表面半椭圆裂纹
semi-elliptical surface crack
裂纹-圆-椭圆模型
crack-holeellipse interaction model
预埋椭圆裂纹
pre-existing ellipse flaw
表面裂纹 K1因子
stress-intensity factors for the suace crack
表面裂纹和深埋裂纹
surface flaw and sub-surface flaw
表面裂纹咀张开位移率
surface crack mouth opening displacement rate