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Ikumu Watanabe
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Multiscale Finite Element Analysis of Yield-point Phenomenon in Ferrite–Pearlite Duplex Steels
Description/Abstract:
The yield-point phenomena in ferrite–pearlite duplex steels were investigated using multiscale computational simulations. In these multis...
Keyword:
yield-point phenomenon
Resource Type:
Article
Author:
Shinnosuke Yanagawa
and
Ikumu Watanabe
Journal:
ISIJ International
Date Uploaded:
12/04/2024
Minimal-surface-based multiphase metamaterials with highly variable stiffness
Description/Abstract:
Variable-stiffness materials have a unique ability to change their stiffness reversibly in response to external stimuli or conditions. Ho...
Keyword:
Low-melting-point alloys
,
Mechanical metamaterials
,
Phase transition
,
Shape memory
,
Triply periodic minimal surfaces
, and
Variable-stiffness materials
Resource Type:
Article
Author:
Xiaoyang Zheng
,
Ikumu Watanabe
,
Siqian Wang
,
Ta-Te Chen
, and
Masanobu Naito
Journal:
Materials & Design
Date Uploaded:
12/04/2024
Multi-objective topology optimization of porous microstructure in die-bonding layer of a semiconductor
Description/Abstract:
To enhance semiconductor efficiency, it is imperative to develop a die-bonding material possessing exceptional thermal conductivity and s...
Keyword:
Multi-objective topology optimization
,
finite element analysis
,
highthroughput evaluation
,
microstructure design
, and
porous microstructure
Resource Type:
Article
Author:
Jiaxin Zhou
,
Ikumu Watanabe
,
Weikang Song
,
Keita Kambayashi
, and
Ta-Te Chen
Journal:
Science and Technology of Advanced Materials: Methods
Date Uploaded:
12/04/2024
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
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