Index Catalog // MDR

Multiscale analysis of mechanical behavior of multilayer steel structures fabricated by wire and arc additive manufacturing

Description/Abstract:: The mechanical behavior of multilayer steel structures fabricated via wire and arc additive manufacturing (WAAM) has been investigated fr...
Keyword:: Wire and arc additive manufacturing, finite element method, instrumented indentation, multiscale characterization, and stainless steel
Resource Type:: Article
Author:: Ikumu Watanabe, Zhengzhong Sun, Houichi Kitano, and Kenta Goto
Date Uploaded:: 02/03/2023

Topological alternation from structurally adaptable to mechanically stable crosslinked polymer

Description/Abstract:: Stimuli-responsive polymers with complicated but controllable shape-morphing behaviors are critically desirable in several engineering f...
Keyword:: Covalent adaptable network polymer, creep deformation, shape-morphing polymer material, and topological alternation
Resource Type:: Article
Author:: Wei-Hsun Hu, Ta-Te Chen, Ryo Tamura, Kei Terayama, Siqian Wang, Ikumu Watanabe, and Masanobu Naito
Date Uploaded:: 02/03/2023

Stress dependence of indentation modulus for carbon fiber in polymer composite

Description/Abstract:: Elastic modulus measured through atomic force microscopy (AFM)-based indentation on single carbon fiber (CF) is found with dependence on ...
Keyword:: Atomic force microscopy and indentation
Resource Type:: Article
Author:: Hongxin Wang, Han Zhang, Daiming Tang, Kenta Goto, Ikumu Watanabe, Hideaki Kitazawa, Masamichi Kawai, Hiroaki Mamiya, and Daisuke Fujita
Date Uploaded:: 02/03/2023

Estimation of Texture-Dependent Stress-Strain Curve and <i>r</i>-Value of Aluminum Alloy Sheet Using Deep Learning

Description/Abstract:: Deformation of an aluminum alloy sheet which is affected by its underlying crystallographic texture has been widely studied using crystal...
Keyword:: crystallite orientation, deep learning, flow stress, numerical analysis, tension test, and texture
Resource Type:: Article
Author:: Kohta Koenuma, Akinori Yamanaka, Ikumu Watanabe, and Toshihiko Kuwabara
Date Uploaded:: 02/03/2023

Stress mapping reveals extrinsic toughening of brittle carbon fiber in polymer matrix

Description/Abstract:: We conducted an in situ study on CFRP fracturing process using atomic-force-microscopybased stress-sensitive indentation. Tensile stress ...
Keyword:: AFM, CFRP, Stress, and indentation
Resource Type:: Article
Author:: Hongxin Wang, Han Zhang, Kenta Goto, Ikumu Watanabe, Hideaki Kitazawa, Masamichi Kawai, Hiroaki Mamiya, and Daisuke Fujita
Date Uploaded:: 02/03/2023

Inverse estimation approach for elastoplastic properties using the load-displacement curve and pile-up topography of a single Berkovich indentation

Description/Abstract:: An approach for the inverse estimation of the elastoplastic properties from a single indentation with a Berkovich indenter was developed....
Keyword:: Elastic-plastic material, Finite elements, Indentation, Inverse analysis, and Mechanical testing
Resource Type:: Article
Author:: Kenta Goto, Ikumu Watanabe, and Takahito Ohmura
Date Uploaded:: 02/03/2023

Anisotropic Multiscale Modelling in SAE-AISI 1524 Gas Tungsten Arc Welded Joints

Description/Abstract:: A transient non-linear multiscale finite element heat flow-mechanical model to determine micro residual stresses (type III) and micro pla...
Keyword:: GTA welding, anisotropy, digital microstructure code, micro residual stresses, sub-modeling, and thermal gradients
Resource Type:: Article
Author:: Edison A. Bonifaz and Ikumu Watanabe
Date Uploaded:: 28/02/2023

Analysis of Nano-hardness Distribution Near the Ferrite-martensite Interface in a Dual Phase Steel with Factorization of Its Scattering Behavior

Description/Abstract:: We investigated the local preliminary hardening of ferrite near the ferrite–martensite interfaces in a dual-phase (DP) steel. Geometrical...
Keyword:: dual phase steel, grains and interfaces, nanoindentation, scattering, and serial sectioning
Resource Type:: Article
Author:: Reon Ando, Takashi Matsuno, Tomoko Matsuda, Norio Yamashita, Hideo Yokota, Kenta Goto, and Ikumu Watanabe
Date Uploaded:: 28/02/2023

Data-driven estimation of plastic properties in work-hardening model combining power-law and linear hardening using instrumented indentation test

Description/Abstract:: In this study, a method for determining the additional material constant in a modified work-hardening model combining power-law and linea...
Keyword:: Elastic-plastic material, finite element method, instrumented indentation test, material database, and response surface
Resource Type:: Article
Author:: Ta-Te Chen and Ikumu Watanabe
Date Uploaded:: 28/02/2023

Three-Dimensionally Gradient and Periodic Harmonic Structure for High Performance Advanced Structural Materials

Description/Abstract:: Creation of a unique “Harmonic Structure (HS)” with controlled bimodal grain size distribution in metals and alloys is a new material de...
Keyword:: bimodal Titanium, harmonic structure, lightweight materials, powder metallurgy, severe plastic deformation, and strengthening
Resource Type:: Article
Author:: Sanjay Kumar Vajpai, Han Yu, Mie Ota, Ikumu Watanabe, Guy Dirras, and Kei Ameyama
Date Uploaded:: 28/02/2023

Data-driven estimation of plastic properties of alloys using neighboring indentation test

Description/Abstract:: A data-driven estimation method for the plastic properties of alloys was proposed using indentations at neighboring positions. An instrum...
Keyword:: Elastic-plastic material, finite element method, instrumented indentation test, material database, mechanical testing, and response surface
Resource Type:: Article
Author:: Ta-Te Chen, Ikumu Watanabe, Dayuan Liu, and Kenta Goto
Date Uploaded:: 28/02/2023

Reprogrammable flexible mechanical metamaterials

Description/Abstract:: Mechanical metamaterials are artificial structures with structure-dependent properties. They often harness zero-energy deformation modes....
Keyword:: Buckling, Imperfection, Mechanical metamaterials, Negative Poisson’s ratios, Shape-memory polymers, and Soft robotics
Resource Type:: Article
Author:: Xiaoyang Zheng, Koichiro Uto, Wei-Hsun Hu, Ta-Te Chen, Masanobu Naito, and Ikumu Watanabe
Date Uploaded:: 28/02/2023

Characterization of the Strain-Rate-Dependent Plasticity of Alloys Using Instrumented Indentation Tests

Description/Abstract:: Instrumented indentation tests are an efficient approach to characterize stress--strain curves instead of tensile or compression tests an...
Keyword:: finite elements, instrumented indentation test, mechanical testing, and strain-rate-dependent plasticity
Resource Type:: Article
Author:: Ta-Te Chen, Ikumu Watanabe, and Tatsuya Funazuka
Date Uploaded:: 28/02/2023

A mathematically defined 3D auxetic metamaterial with tunable mechanical and conduction properties

Description/Abstract:: An auxetic metamaterial is a type of mechanical metamaterial that has negative Poisson's ratio. Most auxetic metamaterials are truss-base...
Keyword:: 3D printing, Electroless plating, Metamaterial, Minimal surface, and Negative Poisson’s ratio
Resource Type:: Article
Author:: Xiaoyang Zheng, Xiaofeng Guo, and Ikumu Watanabe
Date Uploaded:: 28/02/2023

Tensile deformation behavior of TRIP-aided bainitic ferrite steel in the post-necking strain region

Description/Abstract:: This study validated the methods for the evaluation of stress triaxiality using finite element (FE) simulations. The FE simulations traci...
Keyword:: Advanced high-strength steel, finite element simulation, large strain, small round-bar tensile test, stress-triaxiality, and synchrotron X-ray diffraction
Resource Type:: Article
Author:: Takashi Matsuno, Tomohiko Hojo, Ikumu Watanabe, Ayumi Shiro, Takahisa Shobu, and Kentaro Kajiwara
Date Uploaded:: 28/02/2023

Origin of phase stability in Fe with long-period stacking order as an intermediate phase in cyclic γ−ε martensitic transformation

Description/Abstract:: A class of Fe-Mn-Si based alloys was found to exhibit a reversible martensitic transformation between the gamma (fcc) and epsilon (hcp) p...
Resource Type:: Article
Author:: Takao Tsumuraya, Ikumu Watanabe, and Takahiro Sawaguchi
Date Uploaded:: 28/02/2023

Effect of Punch Surface Microtexture on the Microextrudability of AA6063 Micro Backward Extrusion

Description/Abstract:: To apply conventional forming processes to microscale processing, the influence of size effects caused by material properties and frictio...
Keyword:: aluminum alloy, microextrusion, microtexture, size effect, and tribology
Resource Type:: Article
Author:: Tatsuya Funazuka, Kuniaki Dohda, Tomomi Shiratori, Syunsuke Horiuchi, and Ikumu Watanabe
Date Uploaded:: 28/02/2023

Controllable inverse design of auxetic metamaterials using deep learning

Description/Abstract:: As typical mechanical metamaterials with negative Poisson's ratios, auxetic metamaterials exhibit counterintuitive auxetic behaviors tha...
Keyword:: Additive manufacturing, Generative adversarial network, Metamaterial, Negative Poisson’s ratio, and Voronoi tessellation
Resource Type:: Article
Author:: Xiaoyang Zheng, Ta-Te Chen, Xiaofeng Guo, Sadaki Samitsu, and Ikumu Watanabe
Date Uploaded:: 28/02/2023

Numerical calculation and finite element analysis for anisotropic elastic properties of carbon fibers: Dependence of integration subinterval and mesh size on indentation-derived elastic modulus

Description/Abstract:: The elastic modulus measured by indentation of carbon fibers with various anisotropic elasticity is calculated by two numerical approache...
Keyword:: Vlassak–Nix model, anisotropic elasticity, finite element method, indentation, and numerical integration
Resource Type:: Article
Author:: Kenta Goto, Kimiyoshi Naito, Keiichi Shirasu, and Ikumu Watanabe
Date Uploaded:: 28/02/2023

Deep-learning-based inverse design of three-dimensional architected cellular materials with the target porosity and stiffness using voxelized Voronoi lattices

Description/Abstract:: Architected cellular materials are a class of artificial materials with cellular architecture-dependent properties. Typically, designing ...
Keyword:: Architected materials, Voronoi lattices, finite element simulation, generative adversarial network, inverse design, and mechanical properties
Resource Type:: Article
Author:: Xiaoyang Zheng, Ta-Te Chen, Xiaoyu Jiang, Masanobu Naito, and Ikumu Watanabe
Date Uploaded:: 28/02/2023

Multiscale characterization of a polycrystalline aggregate subjected to severe plastic deformation with the finite element method

Description/Abstract:: The heterogeneous deformation of a polycrystalline aggregate under severe plastic deformation was reproduced with finite element analysis...
Keyword:: crystal plasticity, finite element analysis, severe plastic deformation, and texture
Resource Type:: Article
Author:: Ikumu Watanabe and Daigo Setoyama
Date Uploaded:: 28/02/2023

Numerical Estimation of Frictional Effects in Equal Channel Angular Extrusion

Description/Abstract:: The purpose of this study is to numerically estimate the friction coefficient for equal channel angular extrusion (ECAE) with and without...
Keyword:: equal channel angular extrusion, finite element analysis, and friction model
Resource Type:: Article
Author:: Vinicius Aguiar de Souza, Ikumu Watanabe, and Akira Yanagida
Date Uploaded:: 28/02/2023

Deep neural network approach to estimate biaxial stress-strain curves of sheet metals

Description/Abstract:: Multiaxial material testing is used to evaluate plastic deformation behavior of sheet metals in multiaxial stress states. A constitutive ...
Keyword:: Aluminum alloy sheets, Deep neural network, Material modeling, and Multiaxial material testing
Resource Type:: Article
Author:: Akinori Yamanaka, Ryunosuke Kamijyo, Kohta Koenuma, Ikumu Watanabe, and Toshihiko Kuwabara
Date Uploaded:: 28/02/2023

Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion

Description/Abstract:: In order to apply conventional forming processes at the micro scale, the size effects caused by material properties and frictional effect...
Keyword:: aluminum alloy, grain size, microextrusion, microtexture, and size effect
Resource Type:: Article
Author:: Tatsuya Funazuka, Kuniaki Dohda, Tomomi Shiratori, Ryo Hiramiya, and Ikumu Watanabe
Date Uploaded:: 28/02/2023

Relationship Extraction with Weakly Supervised Learning Based on Process-Structure-Property-Performance Reciprocity

Description/Abstract:: We developed a computer aided material design system that extracts relationships from natural language texts in weakly labeled data. We b...
Keyword:: Natural language processing, knowledge extraction, materials informatics, relation extraction, and weakly supervised learning
Resource Type:: Article
Author:: Takeshi Onishi, Takuya Kadohira, and Ikumu Watanabe
Date Uploaded:: 17/02/2023

Multiscale analysis of mechanical behavior of multilayer steel structures fabricated by wire and arc additive manufacturing

Topological alternation from structurally adaptable to mechanically stable crosslinked polymer

Stress dependence of indentation modulus for carbon fiber in polymer composite

Estimation of Texture-Dependent Stress-Strain Curve and <i>r</i>-Value of Aluminum Alloy Sheet Using Deep Learning

Stress mapping reveals extrinsic toughening of brittle carbon fiber in polymer matrix

Inverse estimation approach for elastoplastic properties using the load-displacement curve and pile-up topography of a single Berkovich indentation

Anisotropic Multiscale Modelling in SAE-AISI 1524 Gas Tungsten Arc Welded Joints

Analysis of Nano-hardness Distribution Near the Ferrite-martensite Interface in a Dual Phase Steel with Factorization of Its Scattering Behavior

Data-driven estimation of plastic properties in work-hardening model combining power-law and linear hardening using instrumented indentation test

Three-Dimensionally Gradient and Periodic Harmonic Structure for High Performance Advanced Structural Materials

Data-driven estimation of plastic properties of alloys using neighboring indentation test

Reprogrammable flexible mechanical metamaterials

Characterization of the Strain-Rate-Dependent Plasticity of Alloys Using Instrumented Indentation Tests

A mathematically defined 3D auxetic metamaterial with tunable mechanical and conduction properties

Tensile deformation behavior of TRIP-aided bainitic ferrite steel in the post-necking strain region

Origin of phase stability in Fe with long-period stacking order as an intermediate phase in cyclic γ−ε martensitic transformation

Effect of Punch Surface Microtexture on the Microextrudability of AA6063 Micro Backward Extrusion

Controllable inverse design of auxetic metamaterials using deep learning

Numerical calculation and finite element analysis for anisotropic elastic properties of carbon fibers: Dependence of integration subinterval and mesh size on indentation-derived elastic modulus

Deep-learning-based inverse design of three-dimensional architected cellular materials with the target porosity and stiffness using voxelized Voronoi lattices

Multiscale characterization of a polycrystalline aggregate subjected to severe plastic deformation with the finite element method

Numerical Estimation of Frictional Effects in Equal Channel Angular Extrusion

Deep neural network approach to estimate biaxial stress-strain curves of sheet metals

Effect of Punch Surface Grooves on Microformability of AA6063 Backward Microextrusion

Relationship Extraction with Weakly Supervised Learning Based on Process-Structure-Property-Performance Reciprocity

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