中心小裂纹的弹塑性分析

ELASTIC-PLASTIC ANALYSIS OF CENTRAL SHORT CRACKS

用修正能量法得到含中心小裂纹平板在均匀载荷作用下的J积分和张开位移的全塑性解。并用弹塑性分析的工程方法得到相应的弹塑性解。结果与无限大板的解作了比校,表明当a/b≤0.05时两者的差别小于5％。而对于a/b>0.05的情况,把无限大板的解用于中心小裂纹的板条可能会产生较大的误差。

Fully plastic solutions of J integral and Crack Opening Displacement for panels with a central short crack under the action of a uniform load are obtained by the modified energy method. The corresponding elastic-plastic solutions are also obtained by the-engineering method of elastic-plastic analysis. The comparison of the obtained results with those of infinite bodies shows that the difference is within 5% when a/b<0.05. On the other hand, in the case that a/b>05, the error may not be negligible if the solutions for infinite bodies are used for panels with central short cracks.