Effects of coating properties on crack propagation in nicalon-fiber/SiC-matrix composites

被引：7
作者：
Kumar, S [1 ]
Singh, RN [1 ]
机构：
[1] UNIV CINCINNATI, DEPT MAT SCI & ENGN, CINCINNATI, OH 45221 USA
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 1996年 / 56卷 / 11期
关键词：
finite element; bi-material interface; composite; fracture mechanics; plane strain;
D O I：
10.1016/S0266-3538(96)00087-5
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
A finite element technique has been toed to study the effects of coating properties on the propagation of cracks which terminate perpendicular to the fiber coating or coating/matrix interfaces. Four types of coatings are considered for Nicalon/SiC composites. The hoop and tangential stresses and the energy release rates are analyzed for the various coatings. Although the change in the thickness of coatings has a very small effect on the stress ratio (ratio of hoop stresses along the crack and at the interface) and energy release rate ratio (ratio of energy release rates for the crack penetration and crack deflection), the magnitudes of the stresses and energy release rates change substantially. The finite element results for Nicalon/SiC composites with a carbon coating are in agreement with previous experimental findings. (C) 1996 Elsevier Science Limited
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页码：1271 / 1281
页数：11
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