Based on this, the relationship between strain and FDEE is studied and a unified equation for low-cycle fatigue fractal damage evolution depended on strain is established, a life prediction method for TC11 welded joint is obtained.

• 分析建立了分形初始损伤以及分形临界损伤与载荷间的函数关系,将其引入分形损伤演化方程后,得到了仅与载荷相关的焊接接头低周疲劳分形损伤演化统一方程,从而建立了TC11钛合金焊接接头的寿命预测模型,通过该模型可得给定载荷的预测寿命分布。