Numerical Simulation of Stress Intensity Factor of Surface Crack under Biaxial-bending Loading
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摘要: 本文通过FRANC3D软件计算双轴弯曲载荷下表面裂纹前缘的应力强度因子,数值计算和理论计算结果基本吻合;通过等裂纹面积不同纵横比的表面裂纹前缘应力强度因子的分析可知:当表面裂纹为浅裂纹时,等裂纹面积下a/c=1/3时椭圆表面裂纹最为危险;当表面裂纹为深裂纹时,等裂纹面积下a/c=2时椭圆表面裂纹最为危险。Abstract: Stress intensity factor of surface crack front under biaxial-bending loading was calculated by FRANC3 D.The results of simulation and theoretical calculation are totally consistent.Besides,stress intensity factor of surface crack front of various aspect ratios in the case of equal area crack is analyzed.It is found that,ellipse surface crack with a/c = 1 /3 is mostly dangerous if the surface crack is shallow; ellipse surface crack with a/c = 2 is mostly dangerous if the surface crack is deep.
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Keywords:
- biaxial-bending /
- surface crack /
- stress intensity factor /
- numerical simulation
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