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Ikumu Watanabe
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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
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
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
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
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
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
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Ikumu Watanabe
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