中文摘要：

采用FRANC2D软件对中心裂纹试样、单边裂纹试样和双边裂纹试样进行计算分析，比较研究了位移相关法、虚裂纹闭合法、J-积分法等3种应力强度因子的计算方法和最大周向应力准则、最大应变能释放率准则和最小应变能密度因子准则等3种裂纹扩展判据．结果表明：3种计算方法中，J-积分法和虚裂纹闭合法计算精度优于位移相关法，虚裂纹闭合法和J-积分法计算的误差总体随着裂纹扩展而减小，而位移相关法计算的误差总体是随着裂纹扩展而增大．在3种判据中，最大周向应力准则和最小应变能密度因子准则优于最大应变能释放率准则，最大应变能释放率准则计算时间和扩展角度误差要比另外2种方法大．

英文摘要：

Samples with center crack, single side crack and two sides crack were analyzed by FRANC2D to compare calculation methods for three stress intensity factors based on displacement correlation method, virtual crack closure integral method and J-integral method, and three crack propagation criterions of maximum circumferential stress, maximum strain energy and minimum strain energy density. The results show that calculation precision of J -integral method and virtual crack closure integral method are superior to displacement correlation method. Two types of calculation error of J - integral method and virtual crack closure integral method decrease with crack propagation, while that of displacement correlation method increases. Calculation velocity and precision of maximum circumferential stress criterion and minimum strain energy density criterion are prior to maximum strain energy release rate criterion. Calculation time and angle error of maximum strain energy release rate criterion is larger than that of other two criterions.