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能容纳二次应力的J积分断裂参量
引用本文:潘红良,李培宁.能容纳二次应力的J积分断裂参量[J].医学教育探索,1996(2):158-164.
作者姓名:潘红良  李培宁
作者单位:华东理工大学机械工程系
基金项目:“八五”国家重点科技攻关课题
摘    要:在阐述J积分物理意义的基础上,通过有限元的计算,对多种能用于二次应力情况下的修正J积分进行了评价,讨论了它们间的相互关系及其适用范围,证明了由Blackbur提出的J^nw的物理意义最为明确,可作为一种断裂参量。

关 键 词:二次应力  断裂参量  有限元  断裂力学  J积分

On J-integral Parameter in the Presence of secondary Stresses
Pan Hongliang and Li Peining.On J-integral Parameter in the Presence of secondary Stresses[J].Researches in Medical Education,1996(2):158-164.
Authors:Pan Hongliang and Li Peining
Abstract:Since Rice J-integral has lost the propriety of path independence in the presence of secondary stresses,it can not be used to describe the stress-strain fields in the crack tip.Until now several modified J-integrals have been put out for this situation. In the paper,the physical significance and suitability of modified J-integrals have been evaluated by FEM.The relationship among them has also been discussed.Results have shown that the physical significance of given by Blackburn is clearest.It can be used as a fracture parameter in the presence of secondary stresses.
Keywords:secondary stresses  fracture parameter  finite element method  fracture criterion  
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