A Continuum Theory of Crack Shielding in Ceramics
A Continuum Theory of Crack Shielding in Ceramics
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DOI：
10.1115/1.3172994
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发表时间：
1987-03
期刊：
影响因子：
--
通讯作者：
M. Ortiz
中科院分区：
文献类型：
--
作者：
M. Ortiz
摘要：提出了一种唯象本构模型，旨在描述陶瓷中微裂纹的整体效应。基于该模型，以封闭形式确定了静止宏观裂纹尖端的渐近应力、应变和位移场。计算了近尖端应力强度因子，并且观察到即使对于中等程度的损伤，它也明显小于所施加的应力强度因子。（作者）
Abstract : A phenomenological constitutive model is proposed which aims at describing the overall effect of microfracture in ceramics. Based on this model, the asymptotic stress, strain and displacement fields at the tip of a stationary macroscopic crack are determined in closed form. The near-tip stress-intensity factor is computed and observed to be significantly smaller than the applied stress-intensity factor even for moderate amounts of damage. (Author)