Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

Award type：Honored in official journal of a scientific society, scientific journal  Country：Japan

Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/09243046.2023.2225256

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compstruct.2022.116453

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/09243046.2022.2113700

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.1299/transjsme.22-00117

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/09243046.2022.2071117

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compositesa.2021.106690

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compscitech.2021.108938

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.engfracmech.2021.107879

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/09243046.2021.1907877

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compositesa.2021.106300

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1177/1099636220908580

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compstruct.2019.111757

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compstruct.2019.111330

Scopus

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/09243046.2018.1555387

Scopus

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.6089/jscm.45.52

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/09243046.2018.1434731

Scopus

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compositesa.2018.10.004

Scopus

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compositesa.2018.07.022

Web of Science

Scopus

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compositesa.2018.05.036

Scopus

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/09243046.2017.1373384

Scopus

Language：Japanese   Publishing type：Research paper (scientific journal)  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.engfracmech.2017.03.019

Scopus

Authorship：Lead author   Language：Japanese  

DOI： 10.2472/jsms.66.282

Scopus

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/09243046.2016.1212645

Scopus

Language：Japanese   Publishing type：Research paper (scientific journal)  

<p>A unidirectional carbon fiber reinforced plastic (CFRP) was scanned by an X-ray computed tomography (CT) system. Based on the X-ray CT images, a three-dimensional model with random fiber waviness was developed. Each fiber location was identified in a sectional CT image. Subsequently, the relative displacement of fibers between adjacent sectional CT images was obtained with a digital image correlation method. This procedure was repeated to obtain fiber waviness along the axial direction. The constructed three-dimensional fiber model showed random waviness of each fiber in the unidirectional CFRP. Finite element analysis was performed using the three-dimensional model. Simulation results showed bending and twisting deformations coupled with axial contractions during axial compression, which developed due to fiber waviness. A reduction of the axial Young's modulus due to fiber random waviness was quantitatively evaluated.</p>

DOI： 10.6089/jscm.43.219

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.14822/kjsass.66.1_5

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.7791/jspmee.6.125

Authorship：Lead author   Language：Japanese  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compstruct.2016.06.002

Scopus

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compstruct.2016.06.004

Scopus

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/09243046.2014.959240

Scopus

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society for Composite Materials  

Local out-of-plane deformation of CFRP ablator subjected to very rapid heating was investigated in this study. The local out-of-plane deformation is measured by three dimensional digital image correlation (3D-DIC) technique. The 3D-DIC at high temperature is achieved by high-temperature resistance random pattern on specimen surface using ceramic bond and blue filter intended for cutting strong infrared radiation from the specimen. Then discussed the mechanism of the local out-of-plane deformation only at the rapid heating condition, in terms of carbonization, pyrolysis gas occurrence, gas pressure storage and interlaminar debonding due to the gas pressure in this study.

DOI： 10.6089/jscm.42.146

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compscitech.2015.08.019

Web of Science

Scopus

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：American Society of Mechanical Engineers (ASME)  

In this study, numerical analytical model which simulates the damage behavior of the through-the-thickness stitched CFRP laminates under high velocity impact (HVI) is developed. The simulation results are compared with experimental results for validation of the developed model. Through-the-thickness stitched CFRP laminates have good mechanical properties such as higher delamination toughness and better impact resistance than that of conventional laminates. In this study, rigid body impact tests were conducted for the stitched CFRP laminates. Test results revealed that through-the-thickness stitching effectively suppressed the propagation of the delamination, and it increased the performance against the perforation. Among them, moderate stitched CFRP had the highest performance. In order to analyze the HVI damage behavior of the stitched CFRP laminate, special finite element model was developed. In the model, the in-plane tensile and compressive fiber damages were considered by using stress criterion. Transverse cracks were modeled by continuum damage mechanics (CDM). Delamination was modeled by cohesive zone model (CZM). The effect of the stitch threads were introduced by multiscale approach. Out-of-plane tensile tests were performed for small specimens those include single stitching. Small finite element model which contains a non-linear spring element was prepared, and the load-displacement relationship of the nonlinear spring was decided so that the result of the model agreed with the tests. Then, the spring elements were introduced to the HVI simulation model. The simulation results revealed that stitching bridges the delamination and delamination area was reduced. On the other hand, the simulation results revealed that delamination reduces the tensile stress in the bottom surface of the laminate. Because delamination easily propagate in the moderate stitched laminates, the performance against the perforation of the moderate stitched laminates is the highest among the stitched laminates.

DOI： 10.1115/IMECE2015-52467

Scopus

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/09243046.2013.844756

Scopus

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s11665-013-0827-1

Web of Science

Scopus

Language：English   Publishing type：Research paper (scientific journal)  

High-velocity impact damage in CFRP laminates was studied experimentally and numerically. Part I of this study observed and evaluated near-perforation damage in the laminates and characterized the damage pattern experimentally. Part II predicts the extension of high-velocity impact damage based on smoothed particle hydrodynamics (SPH), which facilitates the analysis of large deformations, contact, and separation of objects. A cross-ply laminate was divided into 0 and 90 layers, and virtual interlayer particles were inserted to express delamination. The damage patterns predicted on the surfaces and cross-sections agreed well with the experiments. The analyzed delamination shape was similar to that resulting from a low-velocity impact, consisting of pairs of fan-shaped delaminations symmetric about the impact point. Finally, the mechanisms of high-velocity impact damage in CFRP laminates are discussed based on the observations and numerical analyses. © 2013 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.compositesa.2013.04.012

Scopus

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

In this paper a new method which measures fiber orientation in CFRP laminates from X-ray CT images is proposed. In the proposed method, fiber orientation is analyzed by applying digital image correlation method (DIC) to the acquired tomographic images. By using DIC, brightness pattern, which results from radiodensity difference between fiber and resin, is compared between two different planes in thickness direction. Then three dimensional displacement of brightness pattern, which indicates fiber orientation, can be measured. In this study, we applied the proposed method to a quasi-isotropic CFRP laminate. After X-ray CT imaging, the sample was sectioned and polished. Fiber orientation was then experimentally measured by using a microscope. Fiber orientation calculated by the proposed method agrees very well with experimentally measured one, and the validity of the proposed method was demonstrated. Additionally, we applied the proposed method to a plane-woven CFRP laminate. The result revealed that the invalid fiber orientation may be calculated for the fiber orientation is parallel to the plane of CT image, or for the fiber orientation is calculated using the pattern around the outer edge of CT images.

DOI： 10.6089/jscm.40.146

Authorship：Lead author   Language：Japanese  

DOI： 10.11618/adhesion.50.179

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compscitech.2012.11.001

Web of Science

Scopus

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1299/jmmp.7.426

Language：English   Publishing type：Research paper (scientific journal)  

This study investigated mechanisms of the extension of high-velocity impact damage in CFRP laminates. To this end, damage states due to near-perforation impact were studied in detail. This study consists of two parts. Part I presents the experiment results of high-velocity impact tests for CFRPs with specified stacking sequences. A crater and splits were observed on the impacted surface, while multiple splits with fiber breaks extended on the back surface. The cross-section beneath the impact point included catastrophic ply failure with extensive fiber breaks. Impacted specimens also exhibited a particular delamination pattern consisting of pairs of symmetric fan-shaped delaminations emanating from to the impact point and elongated delamination along the cracks in the bottom ply. These damage patterns were common to all of the stacking sequences. Part II of this study presents a numerical analysis of high-velocity impact based on smoothed-particle hydrodynamics and discusses damage extension mechanisms. © 2013 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.compositesa.2012.12.015

Scopus

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1163/156855112X626219

Scopus

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1163/156856111X593694

Scopus

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compositesa.2011.10.005

Scopus

Language：Japanese   Publishing type：Research paper (scientific journal)  

The application of composite laminates to fan blade of turbofan engine is demanded in order to reduce the fuel cost and the noise of aircrafts. Bird strike is one of the most important problems in the engineering application of fan blades. However, the soft-body impact damage on the composite laminates under high-velocity impact has not been clarified sufficiently due to their complexity. Therefore, it is necessary to understand the damage process of the composite materials under the soft-body impact. The current work presented the numerical simulation for soft-body impact using the SPH method to address the large deformation problem, and discussed the change of the failure mode of the composite laminates as a function of impact velocity. Especially, in order to simulate the realistic damage process in composite laminates, a novel approach for the separation of particles was introduced to the model. We confirmed that the numerical simulation was applicable in the soft-body impact problem by the agreement of contact pressure with the experimental results. Moreover, it was shown that the catastrophic failure of the composite laminates by the soft-body impact could be also predicted using this numerical simulation.

DOI： 10.6089/jscm.37.164

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.nima.2011.04.038

Web of Science

Scopus

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

In the present paper, end notched flexure (ENF) tests are conducted for CFRP/CFRP, CFRP/aluminum sheet adhesive bonded specimens at room temperature (296 K), at low temperature (223 K) and at cryogenic temperature (77 K) in order to investigate the mode II adhesive fracture toughnesses. Large difference of the coefficients of thermal expansion (CTE) between the CFRP and the aluminum sheet derives considerable thermal stress at the cryogenic temperature. Therefore, in the ENF tests, the effect of thermal stress must be considered. In the present paper, first the effect of thermal deformation is analytically discussed, and ENF tests are then carried out. The test results reveal that the fracture toughness is much higher at the low temperature than at the room temperature. However, the toughness is significantly lower at the cryogenic temperature than at the low temperature. Moreover, the results show that the crack extends in the adhesive film (cohesive failure) at the room and the low temperatures, whereas it extends at the interface between adhesive film and CFRP (adhesive failure) at the cryogenic. These results imply that the transition of the crack surface caused the degraded adhesive fracture toughness.

DOI： 10.6089/jscm.37.130

Language：English   Publishing type：Research paper (scientific journal)   Publisher：VSP BV  

In this paper, a simple numerical analytical method is proposed for simulating crack extension in a particulate-reinforced composite material. The numerical method is based on finite element analysis with the homogenization method, where crack extension is expressed using embedded cohesive elements. We first present the formulation of the numerical model and verify the model's validity by comparing the simulated crack extension with the linear fracture mechanics. Next we simulate damage extension for a composite reinforced with spherical particles. We consider the cracks in the particles and on particle-matrix interfaces. The analytical results reveal the effect of crack extension on the macroscopic material properties of the composite. The particle crack extends unstably and sharply decreases the tangent modulus of the material, irrespective of the initial flaw size. In contrast, the interfacial crack invariably grows stably and decreases the tangent modulus gradually. (C) Koninklijke Brill NV, Leiden, 2011

DOI： 10.1163/156855111X610406

Web of Science

Scopus

Language：Japanese   Publishing type：Research paper (scientific journal)  

This paper aims at characterizing the high-velocity impact damage behavior in carbon fiber reinforced plastic (CFRP) unidirectional (UD) and cross-ply (CP) laminates. First, the surface and internal damages of CFRP plates impacted at a velocity of 200 and 430m/s were observed by using optical microscopy together with radiography. Next, dynamic finite element analysis was performed to simulate the damage process. Cohesive elements were introduced to express the delamination and splitting cracks while the maximum stress fracture criteria were employed to express the intralaminar failure. Finally, the simulations were compared with the experiment results to verify the reasonability of the analysis. The damage process in both laminates was as follows : 1. A crater accompanied by splitting cracks is generated at the impact point on the front surface while splitting cracks due to bending are observed on the back surface. 2. Cone-shaped matrix cracking is observed in the UD laminate while few matrix cracking is generated in the CP laminate. 3. The shape of the delamination in the UD and CP laminates is a galaxy and a circle, respectively. Delamination size is larger in the CP laminate than in the UD laminate, which results in higher energy absorption capability in the CP laminate. Simulations are in qualitatively good agreement with the experiment results.

DOI： 10.2472/jsms.60.418

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCI LTD  

Composite laminates with thin-ply layers are expected to exhibit superior damage resistance to the standard composite laminates. This study investigated the damage characteristics of carbon fiber/toughened epoxy thin-ply laminates subjected to transverse loadings. Quasi-isotropic laminates were prepared using both standard prepregs and thin-ply prepregs in order to examine the effect of ply thickness on the damage accumulation processes. Clear difference on damage accumulation process between standard laminates and thin-ply laminates was identified; fiber fractures were susceptible to formation in thin-ply laminates. Finally, the reason of the difference on damage process was investigated using finite element analyses, and it was clarified that the accumulated delamination position has a significant effect on the fiber fractures during the indentation. (C) 2010 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.compstruct.2010.06.016

Web of Science

Scopus

Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCI LTD  

A coupled thermal-electrical analysis of carbon fiber reinforced polymer composites (CFRP) exposed to simulated lightning current was conducted in order to elucidate the damage behavior caused by a lightning strike with the numerical results being compared to experimental results. Based on the experimental results and a preliminary analysis, the specific mechanism of electrical conduction through the thickness direction of CFRP following thermal decomposition was revealed to be a key parameter for accurate numerical simulation. In particular, assuming the electrical conductivity in the thickness direction to be linear with respect to temperature in the range from the epoxy decomposition temperature to carbon sublimation temperature produced reasonable numerical results. The delamination area and damage depth were estimated from numerical results and thermal decomposition behavior of CFRP with the estimated damage area agreeing qualitatively with the experimental results. Numerical results suggest that Joule heat generation significantly influences lightning strike damage. (C) 2010 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.compositesa.2010.04.001

Web of Science

Scopus

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compositesa.2009.12.005

Scopus

Language：English   Publishing type：Research paper (scientific journal)   Publisher：SPRINGER  

We performed a numerical simulation of a time-dependent interfacial failure accompanied by a fiber failure, and examined their evolution under shear and compressive loads in single-fiber composites. The compressive load on the interface consists of Poisson&apos;s contraction for matrix resin subjected to longitudinal tensile load. As time progresses, compressive stress at the interface in the fiber radial direction relaxes under the constant longitudinal tensile strain condition for the specimen, directly causing the relaxation of the interface frictional stress. This relaxation facilitates the failure of the interface. In this analysis, a specific criterion for interface failure is applied; apparent interfacial shear strength is enhanced by compressive stress, which is referred as quasi-parabolic criterion in the present study. The results of the stress recovery profile around the fiber failure and the interfacial debonding length as a function of time simulated by the finite element analysis employing the criterion are very similar to experimental results obtained using micro-Raman spectroscopy.

DOI： 10.1007/s10443-009-9118-2

Web of Science

Scopus

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.2322/tastj.8.Pc_5

Language：Japanese   Publishing type：Research paper (scientific journal)  

This paper presents coupled thermal-electrical analysis of transient temperature distribution in carbon fibre composites (CFRP) exposed to simulated lightning current to understand the damage behaviour due to lightening strike. Thermal and electrical properties of CFRP were evaluated for each direction of the unidirectional composites. The thermal decomposition behaviour was also estimated from thermo-gravimetric analysis results. Based on the experimental results and preliminary analysis results, the electrical and thermal boundary conditions were discussed in detail. The numerical results are directly compared with the experimental results, and the damage mechanisms of CFRP exposed to impulse current were considered. As a result, it was inferred that the delamination of CFRP was mainly caused by the decomposition of matrix resin, and the fibres were broken by the sublimation due to high Joule heat generation.

DOI： 10.2322/jjsass.57.336

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

The present paper proposes a simple numerical analytical method for crack extension simulation in the particle reinforced composite, and reveals the effect of crack extension on the macroscopic material properties of the particle reinforced composite. This numerical method is based on the homogenization method and Dugdale-type cohesive elements. In the present paper, we first present the formulation of the numerical model. We then verify the validity of the numerical model by comparing the simulated crack extension with the linear fracture mechanics. Finally we perform the crack extension simulation for the composite reinforced by spherical particle. We consider the inclusion crack and interfacial crack between inclusion and matrix. The analytical results reveal that the inclusion crack extends always unstably regardless of the size of initial crack, and the evolution of inclusion crack sharply decreases the apparent Young's modulus in the perpendicular direction to the crack surface and shear modulus in the out-of-plane direction of crack surface. The results also demonstrated that the interfacial crack always extends stably regardless of the size of initial crack, and the evolution of interfacial crack gradually degrades the stiffness in all direction.

DOI： 10.6089/jscm.35.112

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1163/156855109X428727

Scopus

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.2322/tstj.7.Pc_19

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.6089/jscm.34.182

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.6089/jscm.34.14

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compositesa.2008.04.019

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.2322/jjsass.56.492

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1163/156855107781393740

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.6089/jscm.32.198

Event date： 2024.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛知県豊橋市   Country：Japan  

Event date： 2024.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛知県豊橋市   Country：Japan  

Event date： 2024.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛知県豊橋市   Country：Japan  

Event date： 2024.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛知県豊橋市   Country：Japan  

Event date： 2024.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛知県豊橋市   Country：Japan  

Event date： 2024.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛知県豊橋市   Country：Japan  

Event date： 2024.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛知県豊橋市   Country：Japan  

Event date： 2024.9

Language：English   Presentation type：Oral presentation (keynote)  

Venue：Nagoya, Aichi   Country：Japan  

Event date： 2024.8

Language：English   Presentation type：Oral presentation (invited, special)  

Venue：Kuala Lumpur   Country：Malaysia  

Event date： 2024.7 - 2024.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：佐賀県鳥栖市   Country：Japan  

Event date： 2024.7 - 2024.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：佐賀県鳥栖市   Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都府京都市   Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都府京都市   Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都府京都市   Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都府京都市   Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都府京都市   Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都府京都市   Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都府京都市   Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都府京都市   Country：Japan  

Event date： 2023.11 - 2023.12

Language：Japanese   Presentation type：Symposium, workshop panel (nominated)  

Venue：千葉県幕張市   Country：Japan  

Event date： 2023.11 - 2023.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Koto-ku, Tokyo   Country：Japan  

Event date： 2023.11 - 2023.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Koto-ku, Tokyo   Country：Japan  

Event date： 2023.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都港区   Country：Japan  

Event date： 2023.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都港区   Country：Japan  

Event date： 2023.10

Language：English   Presentation type：Oral presentation (general)  

Venue：Kanazawa, Ishikawa   Country：Japan  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：茨城県つくば市   Country：Japan  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：茨城県つくば市   Country：Japan  

Event date： 2023.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Woburn, MA   Country：United States  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：宮城県仙台市   Country：Japan  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：宮城県仙台市   Country：Japan  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：宮城県仙台市   Country：Japan  

Event date： 2023.9

Language：Japanese   Presentation type：Symposium, workshop panel (nominated)  

Venue：東京都八王子市   Country：Japan  

Event date： 2023.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Kanazawa, Ishikawa   Country：Japan  

Event date： 2023.7 - 2023.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Belfast, Northern Ireland   Country：United Kingdom  

Event date： 2023.7 - 2023.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Belfast, Northern Ireland   Country：United Kingdom  

Event date： 2023.7 - 2023.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Belfast, Northern Ireland   Country：United Kingdom  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都新宿区   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都新宿区   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都新宿区   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都新宿区   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都新宿区   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都新宿区   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都新宿区   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都新宿区   Country：Japan  

Event date： 2022.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Adelaide, South Australia   Country：Australia  

Event date： 2022.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Adelaide, South Australia   Country：Australia  

Event date： 2022.11

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2022.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Naha, Okinawa   Country：Japan  

Event date： 2022.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Naha, Okinawa   Country：Japan  

Event date： 2022.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：青森県弘前市   Country：Japan  

Event date： 2022.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：青森県弘前市   Country：Japan  

Event date： 2022.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：青森県弘前市   Country：Japan  

Event date： 2022.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡県筑紫野市   Country：Japan  

Event date： 2022.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡県筑紫野市   Country：Japan  

Event date： 2022.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：奈良県奈良市   Country：Japan  

Event date： 2022.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：奈良県奈良市   Country：Japan  

Event date： 2022.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：奈良県奈良市   Country：Japan  

Event date： 2022.7 - 2022.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Online   Country：Japan  

Event date： 2022.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Sendai   Country：Japan  

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Tokyo   Country：Japan  

Event date： 2021.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Online   Country：United States  

Event date： 2021.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Online   Country：United States  

Event date： 2021.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Online   Country：United States  

Event date： 2021.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Online  

Event date： 2021.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Online  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2021.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2020.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Online   Country：Japan  

Event date： 2020.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Online   Country：Japan  

Event date： 2020.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Online   Country：Japan  

Event date： 2020.12

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2020.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2020.9

Language：English   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2020.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2020.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2020.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2020.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2020.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2020.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン開催   Country：Japan  

Event date： 2020.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大阪府大阪市   Country：Japan  

Event date： 2020.3

Language：English   Presentation type：Oral presentation (general)  

Venue：大阪府大阪市   Country：Japan  

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡県糸島市   Country：Japan  

DOI： 10.1299/jsmemm.2019.OS1909

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡県糸島市   Country：Japan  

DOI： 10.1299/jsmemm.2019.OS2118

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡県糸島市   Country：Japan  

DOI： 10.1299/jsmemm.2019.OS2110

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡県糸島市   Country：Japan  

DOI： 10.1299/jsmemm.2019.OS2109

Event date： 2019.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：秋田県秋田市   Country：Japan  

Event date： 2019.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：秋田県秋田市   Country：Japan  

Event date： 2019.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山県岡山市   Country：Japan  

Event date： 2019.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Tokyo   Country：Japan  

Event date： 2019.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Melbourne, VIC   Country：Australia  

Event date： 2019.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Melbourne, VIC   Country：Australia  

Event date： 2019.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Melbourne, VIC   Country：Australia  

Event date： 2019.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Melbourne, VIC   Country：Australia  

Event date： 2019.8

Language：English   Presentation type：Poster presentation  

Venue：Melbourne, VIC   Country：Australia  

Event date： 2019.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長野県長野市   Country：Japan  

Event date： 2019.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長野県長野市   Country：Japan  

Event date： 2019.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長野県長野市   Country：Japan  

Event date： 2019.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長野県長野市   Country：Japan  

Event date： 2019.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Fukui   Country：Japan  

Event date： 2019.5

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2019.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2019.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2019.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2019.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

DOI： 10.1299/jsmetokai.2019.68.101

Event date： 2018.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Seattle, WA   Country：United States  

Scopus

Event date： 2018.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Seattle, WA   Country：United States  

Scopus

Event date： 2018.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：富山県富山市   Country：Japan  

Event date： 2018.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：徳島県徳島市   Country：Japan  

Event date： 2018.6

Language：English   Presentation type：Oral presentation (general)  

Venue：愛知県名古屋市   Country：Japan  

Event date： 2017.10

Language：English   Presentation type：Oral presentation (general)  

Venue：West Lafayettte, IN   Country：United States  

Event date： 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

DOI： 10.1299/jsmecmd.2017.30.259

Event date： 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

<p>In this study, the selective metal melting technology was used for manufacturing the micro-lattice structure, and the effects of laser condition (laser power, scanning speed) on the mechanical properties of lattice block were investigated. Also, by using X-ray CT, the ratio of microstructural void in the lattice was observed. When the laser power increases, the average strand's diameter increases almost linearly. On the contrary, the diameter has a minimum value as the scanning speed increases. Also, the stress-strain curve of lattice block is sensitive to the laser conditions, which is mainly caused by the change of strand's diameter.</p>

DOI： 10.1299/jsmemecj.2017.F041003

Event date： 2017.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Tokyo   Country：Japan  

Event date： 2017.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：Hamamatsu, Shizuoka, Japan   Country：Japan  

DOI： 10.1299/jsmetokai.2017.66.821

Event date： 2016.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Williamsburg, VA   Country：United States  

Scopus

Event date： 2016.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Williamsburg, VA   Country：United States  

Scopus

Event date： 2016.8 - 2016.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Tokyo, Japan   Country：Japan  

Event date： 2016.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Sapporo, Hokkaido   Country：Japan  

Event date： 2016.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Sapporo, Hokkaido   Country：Japan  

Event date： 2016.6

Language：English   Presentation type：Poster presentation  

Venue：Munich, Bavaria   Country：Germany  

Scopus

Event date： 2016.6

Language：English   Presentation type：Oral presentation (general)  

Country：Germany  

Scopus

Event date： 2016.1

Language：English   Presentation type：Oral presentation (general)  

Venue：San Diego, CA   Country：United States  

Event date： 2016.1

Language：English   Presentation type：Oral presentation (general)  

Venue：San Diego, CA   Country：United States  

Scopus

Event date： 2015.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Kanazawa, Ishikawa   Country：Japan  

Event date： 2015.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Kanazawa, Ishikawa   Country：Japan  

Event date： 2015.11

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Carbon fiber reinforced plastics (CFRP) have microscopic inhomogeneity. It is necessary to consider the effect of inhomogeneity in order to improve accuracy for analysis of CFRP structures. In this study, we constructed multiscale simulation method for CFRP plate structure using commercial FEM code, Abaqus. Multiscale simulation consists of microscopic, mesoscopic, and macroscopic scales. In microscopic scale, we obtained material properties of unidirectional fiber tows from material properties of fiber and resin. In mesoscopic scale, CFRP plate stiffness including out-of-plane shear stiffness was calculated for analysis with shell element. Macroscopic analysis was conducted by using plate stiffness and shell elements. Finally we compared results of three-point bending tests including short beam tests with shell element analysis. In three-point bending tests and analysis, we changed aspect ratio by changing jig span. In both of them, when aspect ratio decreases, apparent bending modulus decreases. Analysis showed good agreement with experiments.

DOI： 10.1299/jsmemm.2015._PS0006-18

Event date： 2015.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Houston, TX   Country：United States  

DOI： 10.1115/IMECE2015-52467

Scopus

Event date： 2015.9

Language：English   Presentation type：Oral presentation (general)  

Venue：East Lancing, MI   Country：United States  

Scopus

Event date： 2015.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Copenhagen   Country：Denmark  

Scopus

Event date： 2015.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Copenhagen   Country：Denmark  

Scopus

Event date： 2015.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Copenhagen   Country：Denmark  

Scopus

Event date： 2015.6 - 2015.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Seattle, WA   Country：United States  

Event date： 2015.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Costa Mesa, CA   Country：United States  

DOI： 10.1007/978-3-319-21762-8_38

Scopus

Event date： 2015.5

Language：English   Presentation type：Oral presentation (general)  

Venue：Cesme, Izmir   Country：Turkey  

Event date： 2014.9

Language：English   Presentation type：Oral presentation (general)  

Venue：La Jolla, CA   Country：United States  

Event date： 2014.9

Language：English   Presentation type：Oral presentation (general)  

Venue：La Jolla, CA   Country：United States  

Event date： 2014.9

Language：English   Presentation type：Oral presentation (general)  

Venue：La Jolla, CA   Country：United States  

Event date： 2014.9

Language：English   Presentation type：Oral presentation (general)  

Venue：St. Petersburg   Country：Russian Federation  

Scopus

Event date： 2013.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Nagoya, Aichi   Country：Japan  

Event date： 2013.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Nantes   Country：France  

Event date： 2013.9 - 2013.10

Language：English   Presentation type：Oral presentation (general)  

Venue：Sendai, Miyagi   Country：Japan  

Event date： 2013.9 - 2013.10

Language：English   Presentation type：Oral presentation (general)  

Venue：Sendai, Miyagi   Country：Japan  

Event date： 2013.7 - 2013.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Montreal   Country：Canada  

Scopus

Event date： 2013.7 - 2013.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Montreal   Country：Canada  

Scopus

Event date： 2012.10

Language：English   Presentation type：Oral presentation (general)  

Venue：Arlington, TX   Country：United States  

Scopus

Event date： 2012.10

Language：English   Presentation type：Oral presentation (general)  

Venue：Arlington, TX   Country：United States  

Scopus

Event date： 2012.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Venice   Country：Italy  

Scopus

Event date： 2012.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Venice   Country：Italy  

Scopus

Event date： 2012.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Venice   Country：Italy  

Scopus

Event date： 2011.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Tokyo   Country：Japan  

Event date： 2011.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Tokyo   Country：Japan  

Event date： 2011.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Jeju Island   Country：Korea, Republic of  

Scopus

Event date： 2011.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Jeju Island   Country：Korea, Republic of  

Scopus

Event date： 2011.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Jeju Island   Country：Korea, Republic of  

Event date： 2011.8

Language：English   Presentation type：Oral presentation (general)  

Venue：Jeju Island   Country：Korea, Republic of  

Event date： 2010.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Taipei   Country：Taiwan, Province of China  

Scopus

Event date： 2010.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Taipei   Country：Taiwan, Province of China  

Scopus

Event date： 2010.9

Language：English   Presentation type：Oral presentation (general)  

Country：United States  

Scopus

Event date： 2010.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Dayton, OH   Country：United States  

Scopus

Event date： 2010.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Dayton, OH   Country：United States  

Scopus

Event date： 2009.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Tokyo   Country：Japan  

Event date： 2009.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Edinburgh   Country：United Kingdom  

Scopus

Event date： 2009.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Edinburgh   Country：United Kingdom  

Scopus

Event date： 2009.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Tsukuba, Ibaraki   Country：Japan  

Event date： 2008.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Memphis, TN   Country：United States  

Event date： 2008.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Tokyo   Country：Japan  

Event date： 2007.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Kyoto   Country：Japan  

Event date： 2007.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Seattle, WA   Country：United States  

Event date： 2007.7

Language：English   Presentation type：Oral presentation (general)  

Venue：Kyoto   Country：Japan