Damage evolution during microcracking of brittle solids

被引：45

作者：

Zimmermann, A

Carter, WC

Fuller, ER

机构：

[1] Darmstadt Univ Technol, Ceram Grp, D-64287 Darmstadt, Germany

[2] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[3] NIST, Div Ceram, Gaithersburg, MD 20899 USA

来源：

ACTA MATERIALIA | 2001年 / 49卷 / 01期

关键词：

spontaneous microcracking; computer simulation; thermal expansion;

D O I：

10.1016/S1359-6454(00)00294-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microcracking due to thermal expansion and elastic anisotropy is examined via computer simulations with a microstructural-based finite element model. Random polycrystalline microstructures are generated via Monte Carlo Potts-model simulations. Microcrack formation and propagation due to thermal expansion anisotropy is investigated in these microstructures using a Griffith-type failure criterion in a microstructural-based finite element model called OOF. Effects of the grain size distribution on the accumulation of microcrack damage, as well as on the threshold for microcrack initiation, are analysed. Damage evolution is rationalised by statistical considerations, i.e. damage accumulation is correlated with the statistical distributions of microstructural parameters. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：127 / 137

页数：11

共 38 条

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