刘增利   

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Supervisor of Master's Candidates

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Paper Publications

Title of Paper:激光散斑法对冻土微裂纹形貌和发展过程的研究

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Date of Publication:1998-01-01

Journal:大连理工大学学报

Included Journals:PKU、CSCD

Volume:38

Issue:2

Page Number:152

ISSN No.:1000-8608

Key Words:散斑法; 激光; 冻土; 裂纹张开位移/微裂纹区; 裂纹尖端张开位移

Abstract:将激光散斑法用于冻土材料,得出了裂纹尖端存在一个微裂纹损伤区(或称为断裂过程区)的结论.通过对裂纹尖端一系列散斑图的逐点分析,绘出了微裂纹区随载荷增加而发展的形貌及其全过程,测定了裂纹嘴张开位移的临界值δC,从而为冻土材料的宏微观力学行为研究及弹塑性断裂韧度测试分析提供了有效的途径.

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