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具有理想与非理想界面的双材料四点弯曲试件的界面断裂韧性

, PP. 58-63

Keywords: 理想界面,非理想界面,界面裂纹,断裂韧性

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Abstract:

本文作者用边界元法研究了具有理想与非理想界面的双材料四点弯曲试件的界面断裂韧性.分析了理想界面裂纹尖端的复应力强度因子以及非理想界面裂纹前沿的应变能密度与试件的几何尺寸、双材料的性质等的关系.计算结果表明,当裂纹的长度小于试件内支点的跨度时,上述两个物理量在很大范围内不随裂纹长度而变化.这种稳态的特性为两者的临界值的实验测定提供了方便.

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