考虑长轴方向相邻裂纹影响的双向间隔诱导缝等效强度模型

Equivalent strength model for bilateral interval crack director on the consideration of influence of long axial colinear cracks

基于应力强度因子手册中数值计算结果对长轴方向相邻裂纹影响进行了研究,得到了长轴方向相邻裂纹影响系数公式,将该公式运用到诱导缝等效强度模型中,得到分别基于有效裂纹扩展量和尺寸效应公式且考虑长轴方向相邻裂纹影响的诱导缝等效强度计算公式。算例表明基于有效裂纹扩展量的等效强度模型中抛物线模型计算结果最为合理。

The influence of long axial collinear cracks was studied baaed on simulation results in The Stress Analysis of Cracks Handbook,formula for influence of long axial collinear cracks in bilateral interval crack directors was gotten.The formula was applied to equivalent strength models for bilateral interval crack director.The equivalent strength models considered influence of long axial colinear cracks were gotten on the basis of size effect and effective crack propagation,It is indicated calculation result through parabolic model is the best among all models for bilateral interval crack director based on crack propagation.