期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 528, 期 4-5, 页码 2002-2016出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2010.11.051
关键词
Particle; Grain orientations; Shear bands; Post-necking; Fracture
类别
资金
- National Science and Engineering Research Council of Canada (NSERC)
- General Motors in Canada
The influence of both particle distributions and grain structure on post-necking deformation, e.g., from localized necking to fracture, is studied using a novel edge-constrained plane strain model. An isotropic elasto-plastic material model is developed for the matrix material with grains having different strengths in terms of their Taylor factors. The Taylor factors and the grain orientations are then mapped into an FE model with a modified Voronoi method by representing grains as ellipses and updating orientations by a Taylor-Bishop-Hill (TBH) model. In contrast to the pre-necking deformation where grain-level inhomogeneity dominates, the results show that particle distributions exhibit significant influence on post-necking deformation. This is because the grain-grain property difference tends to evolve rapidly due to excessive deformation and large rigid body rotation in the localized necking band while the particle-matrix property difference does not evolve during post-necking deformation. (C) 2010 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据