Yohei Yasuda
Kitami Institute of Technology
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Publication
Featured researches published by Yohei Yasuda.
Applied Mechanics and Materials | 2015
Lidyana Roslan; Tetsuya Ohashi; Yohei Yasuda; Chikara Suruga
Elasto-plastic tensile deformations in multi-colony structures are studied by finite element analyses to investigate how the deformation in multi-colony structures influence the strain concentration around colony boundary. The results obtained from plastic strain distributions show that plastic strain concentrates around colony boundary when there is a large difference of deformation between adjacent colonies and around the point where boundaries of differently aligned colonies meet.
Key Engineering Materials | 2014
Yohei Yasuda; Tetsuya Ohashi; Takuro Sugiyama
Tensile properties of ferrite lamella in pearlite under lattice strain are examined by a strain gradient crystal plasticity analysis. Tensile direction is made to be parallel to the lamella. Obtained results of macroscopic stress-strain relation of the lamella show significant increase of yield stress and strain hardening rate with the reduction of the lamella thickness and further increase of the yield stress with positive normal lattice strain parallel to the tensile direction in the ferrite layer. Whereas normal lattice strain perpendicular to the tensile direction contributes little to the tensile properties.
Key Engineering Materials | 2014
Roslan Lidyana; Tetsuya Ohashi; Yohei Yasuda; Kohsuke Takahashi; Chikara Suruga
Elasto-plastic tensile deformations in pearlite lamellar and two-colony structures are studied by finite element analyses to investigate the effects of lamellar thickness ratio and difference of lamellae orientation of two colonies in pearlite microstructure. The results obtained from plastic strain distributions in lamellar and colony structures show that plastic deformation in cementite lamellar stabilized when ferrite lamellar is thicker than cementite lamellar thickness and plastic strain concentrates when the difference between cementite lamellar orientation in two colonies are larger than 45°.
Isij International | 2016
Yohei Yasuda; Tetsuya Ohashi
Isij International | 2017
Yohei Yasuda; Tetsuya Ohashi
The Proceedings of Conference of Hokuriku-Shinetsu Branch | 2017
Yohei Yasuda; Tomoaki Niiyama; Tomotsugu Shimokawa; Tetsuya Ohashi
The Proceedings of The Computational Mechanics Conference | 2015
Tetsuya Ohashi; Yuichi Kanazawa; Tsuyoshi Mayama; Yohei Yasuda; Michihiro Sato
The Proceedings of Mechanical Engineering Congress, Japan | 2015
Yohei Yasuda; Tetsuya Ohashi
The Proceedings of The Computational Mechanics Conference | 2014
Yohei Yasuda; Tetsuya Ohashi
The Proceedings of The Computational Mechanics Conference | 2014
Lidyana Roslan; Tetsuya Ohashi; Yohei Yasuda
