伴随微孔洞生长的裂纹弹性定常扩展

IMECH-IR > 力学所知识产出(1956-2008)

	伴随微孔洞生长的裂纹弹性定常扩展
	魏悦广
Source Publication	力学学报
	2000
Volume	32 Issue:3 Pages:291-299
ISSN	0459-1879
Abstract	裂纹在韧性材料中扩展时,将伴随着微孔洞的萌生和生长.孔洞的萌生和演化将直接影响着材料的总体断裂韧性和强度.以往的研究主要集中在将裂纹的扩展刻划为微孔洞的萌生、生长和汇合这样一个过程.从传统的断裂过程区模型出发研究微孔洞的萌生和生长对材料总体断裂韧性的影响,通过采用Gurson模型,建立塑性增量本构关系,然后针对定常扩展情况直接进行分析.孔洞对材料断裂韧性的影响由本构关系刻划,而在孔洞汇合模型中,上述影响则由断裂过程区的改变来体现.研究结果显示出,微孔洞的萌生与生长将使材料断裂韧性降低并随着初始孔洞体积百分比的增大裂纹呈脆性扩展且发生损坏破坏。
Subject Area	力学
Indexed By	其他
Document Type	期刊论文
Identifier	http://dspace.imech.ac.cn/handle/311007/16381
Collection	力学所知识产出(1956-2008)
Recommended Citation GB/T 7714	魏悦广. 伴随微孔洞生长的裂纹弹性定常扩展[J]. 力学学报,2000,32,3,:291-299.
APA	魏悦广.(2000).伴随微孔洞生长的裂纹弹性定常扩展.力学学报,32(3),291-299.
MLA	魏悦广."伴随微孔洞生长的裂纹弹性定常扩展".力学学报 32.3(2000):291-299.

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