The J-integral failure assessment curves(FAC)of cracks at the semi-elliptical single edge notch crack plates(SENCP)are caculated,some factors affecting FAC are dis cussed in details.

• 计算了单边椭圆缺口试件（SENCP）高应变区裂纹的J积分失效评定曲线（FAC），考察了影响FAC的几种因素。