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首页> 外文期刊>Key Engineering Materials >Simulation of Crack Propagation with Microcracking in Al_2O_3 Particle-Dispersed SiC Composites
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Simulation of Crack Propagation with Microcracking in Al_2O_3 Particle-Dispersed SiC Composites

机译：Al_2O_3颗粒分散的SiC复合材料中微裂纹的裂纹扩展模拟

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摘要

The propagation behavior of continuously deflected two-dimensional crack is simulated in Al_2O_3 particle-dispersed SiC matrix composite, where microcracking occurs simultaneously at the interface between particle and matrix. By the body force method, stress intensity factors at the tip of the multiply deflected crack during propagation are numerically calculated. The stresses around the crack tip are represented by superposing the externally applied stress on the residual one due to the difference of thermal expansion coefficients between particle and matrix. The direction of crack propagation is determined by the criterion of maximum energy release rate.
机译：在Al_2O_3颗粒分散的SiC基复合材料中，模拟了连续偏转的二维裂纹的扩展行为，其中在颗粒与基体的界面同时发生了微裂纹。通过体力法，数值计算了扩展过程中多次挠曲裂纹尖端的应力强度因子。由于颗粒和基体之间的热膨胀系数不同，裂纹尖端周围的应力通过将外部施加的应力叠加在残余应力上来表示。裂纹扩展的方向由最大能量释放速率的标准确定。

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