Creep fracture modeling by use of continuum damage variable based on Voronoi simulation of grain boundary cavity

被引：30
|
作者：
Liu, Y [1 ]
Kageyama, Y [1 ]
Murakami, S [1 ]
机构：
[1] Nagoya Univ, Dept Mech Engn, Chikusa Ku, Nagoya, Aichi 46401, Japan
来源：
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 1998年 / 40卷 / 2-3期
关键词：
creep-damage mechanics; micromechanics; grain boundary cavity; Voronoi tessellation; damage variable; anisotropic damage;
D O I：
10.1016/S0020-7403(97)00045-3
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A new approach to creep cavitation damage is developed by combining the basic features of continuum damage mechanics and mechanism-based cavitation models. Based on a polycrystal microstructures simulated by Voronoi tessellation, an anisotropic continuum damage variable is defined, and its evolution is given by applying the mechanism-based equations of cavity nucleation and growth to each grain boundary. Macroscopic creep deformation coupled with the damage variable is calculated by damage mechanics equations. The proposed method has been applied to investigate the damage evolution under uniaxial tension and reversed shear loading conditions. (C) 1997 Published by Elsevier Science Ltd.
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页码：147 / +
页数：11
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