計算力学講演会講演論文集
Online ISSN : 2424-2799
セッションID: 11-06
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双晶の体積分率に依存する流れ応力を考慮した双晶誘起塑性モデルに基づく結晶塑性解析
*大橋 春希青柳 吉輝
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Recently, TWIP steels have been focused on because of their excellent ductility and strength. One approach to formulating the behavior of materials containing deformation twins in terms of crystal plasticity is a model in which each material point in the material is represented by a mixture law based on the volume fractions of the twin and matrix phase. Such kind of approach cannot express the macroscopic mechanical property more precisely because the influence of twin boundaries is neglected. In this study, the mechanical property under the existence of twin boundaries is researched by using crystal plasticity simulation. The analysis intended for a material with a laminar structure made of twin phase and matrix phase reproduces the accumulation of dislocations at twin boundaries. By investigating the influence of twin boundaries on several models with different volume fractions of each phase, the relationship between the volume fractions of the twin phase and the influence of twin boundaries was determined.

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