矩形截面梁的疲劳裂纹形成寿命预估

Prediction of crack initiation life of rectangular cross-section beam

用损伤力学推导了大范围损伤下的预估往复弯曲梁疲劳裂纹形成寿命的封闭解答,给出了确定损伤演化方程中材料常数的方法,说明了预估矩形截面梁疲劳裂纹形成寿命的方法。

By using of the theory of damage mechanics, closed-form solution about predicting crack initiation life of a beam subjected to reverse bending which leads to large range damage is derived. The method of determining material constants in damage evolution equation is given. The approach to predicting crack initiation life of rectangular cross-section beam is discussed.