A Damage Mechanics Treatment of Creep Failure in Rock Salt
A Damage Mechanics Treatment of Creep Failure in Rock Salt
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DOI：
10.1177/105678959700600201
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发表时间：
1997-04
影响因子：
4.2
通讯作者：
K. Chan;S. Bodner;A. F. Fossum;D. Munson
中科院分区：
文献类型：
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作者：
K. Chan;S. Bodner;A. F. Fossum;D. Munson
综述了盐岩蠕变损伤耦合本构模型的研究进展。本构模型是基于这样的假设，即位错滑移和蠕变损伤的微裂纹的形式与可能的翼尖有助于宏观非弹性应变率。给出了相应的动力学方程、流动定律和损伤演化方程。评价的耦合蠕变和断裂模型对测量的蠕变响应的清洁盐从废物隔离中试厂（WIPP）网站。此外，WIPP盐在三轴压缩和间接拉伸条件下的蠕变损伤发展和破裂过程也进行了分析，以评价几种蠕变破裂准则。
Recent progress in the formulation of a constitutive model for describing coupled creep and damage development in rock salt is summarized. The constitutive model is based on the assumption that both dislocation slip and creep damage in the form of microcracks with possible wing-tips contribute to the macroscopic inelastic strain rate. The relevant kinetic equations, flow law, and damage evolution equation are presented. Evaluations are made of the coupled creep and fracture model against the measured creep response of clean salt from the Waste Isolation Pilot Plant (WIPP) site. In addition, the development of creep damage and the rupture of WIPP salt subjected to either triaxial compression or indirect tension have been analyzed to evaluate several creep rupture criteria.