三維多裂縫問題之能量式破壞參數分析;Energy Fracture Parameters for Three-Dimensional Multi-Cracked Problems

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题名:	三維多裂縫問題之能量式破壞參數分析;Energy Fracture Parameters for Three-Dimensional Multi-Cracked Problems
作者:	張瑞宏
贡献者:	國立中央大學土木工程學系
关键词:	土木水利工程
日期:	2012-12-01
上传时间:	2014-03-17 11:18:44 (UTC+8)
出版者:	行政院國家科學委員會
摘要:	研究期間：10108~10207;In this proposed research, a problem-invariant Mc-integral is proposed as an energy parameter for characterizing the fracture behavior of 3-D multi-cracked elastic solids. Based on the concept of the M-integral, Mc is defined by suitably choosing a closed surface and taking the integration with respect to the geometric center of all the enclosed cracks. Note that the physical meaning for 3-D Mc, which is to be related to the surface energy corresponding to creation of the cracks, does not hold in a manner as that for 2-D Mc and needs to be properly reformulated. Also, it is to be shown that the 3-D integration is surface-independent in a modified sense. With this property, a closed surface remote from the crack fronts can be chosen so that the 3-D Mc can be accurately evaluated with finite element solutions even when the near-front areas are not simulated with very fine grids.
關聯:	財團法人國家實驗研究院科技政策研究與資訊中心
显示于类别:	[土木工程學系 ] 研究計畫

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