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中文核心期刊

微裂纹屏蔽问题中守恒积分投影关系

THE PROJECTED RELATION OF THE CONSERVATION INTEGRAL IN MICROCRACK SHIELDING PROBLEMS

  • 摘要: 对连续体损伤力学在微裂纹屏蔽问题中应用的J积分守恒假设提出质疑.用理论分析和电算实践证明了远场J积分在微裂纹损伤区中的再分配关系,即Jκ矢量的投影守恒关系.在这一关系中,被Herrmann所轻视的J2分量起着十分重要的作用.本文的研究表明,Ortiz理论应考虑到远场J积分在损伤区中的损失,并通过计及这一损失做出必要的修正

     

    Abstract: In this paper, the J integral conservation in adopting the continuum mechanics in the microcrack shielding problems is reexamined. From thetheoretical manipulation as well as the computational experiment, it is proved that there is a redistribution relation of the remote J integral in the microcracking damage region, i.e., the relation of theprojected conservation of the J k vector. In the relation, the J 2 component ignored by Herrmann and Herrmann plays an important role. It is concluded...

     

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