Three-dimensional simulation of crack extension in brittle polycrystalline materials

被引：7

作者：

Kamiya, S

Yamauchi, T

Abé, H

机构：

[1] Tohoku Univ, Dept Mech Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

[2] Tohoku Univ, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

ENGINEERING FRACTURE MECHANICS | 2000年 / 66卷 / 06期

关键词：

brittle polycrystals; anisotropic thermal expansion; three-dimensional residual stress distribution; microcracks; crack extension resistance;

D O I：

10.1016/S0013-7944(00)00040-0

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Crack extension resistance in brittle polycrystals was investigated from the viewpoint of three-dimensional microcrack evolution. Even in the case of macroscopically two-dimensional cracks, inhomogeneous distribution of microscopic stress along the crack front gives rise to three-dimensional structures of extended crack surfaces. Numerical simulations of macroscopic crack extension were carried out, which showed that three-dimensional distribution of grain-by-grain thermal stress leads to a significant increase in the crack extension resistance. It was concluded that three-dimensional interpretation on the microscopic inhomogeneity is necessary for the correct comprehension of macroscopic crack extension behavior in brittle polycrystals. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：573 / 586

页数：14

共 15 条

[1] FINITE-ELEMENT METHOD SIMULATION OF CRACK-PROPAGATION IN A BRITTLE MICROCRACKING SOLID [J].