Multiaxial high-cycle fatigue failure criterion and life prediction is important for structural components under complex low stress. A new multiaxial high-cycle fatigue damage parameter based on the plane of maximum shear stress is proposed, which includes the maximum shear stress amplitude, normal stress amplitude and maximum equivalent normal stress. The maximum equivalent normal stress is defined in the form of SWT stress function considering the influence of mean stress. The feasibility of the proposed failure criterion and life prediction model is verified by test data of different materials. The predicted results show that the life prediction error of the proposed fatigue model is basically within three times by comparing with McDiarmid, Matake, Crossland and Papadopoulos fatigue models.

多轴高周疲劳失效判据和寿命预测对于复杂低应力下的结构部件具有重要意义。提出了一种新的基于最大剪应力平面的多轴高周疲劳损伤参数，包括最大剪应力幅值、法向应力幅值和最大等效法向应力。考虑平均应力的影响，最大等效正应力以 SWT 应力函数的形式定义。通过不同材料的试验数据验证了所提出的失效准则和寿命预测模型的可行性。预测结果表明，与 McDiarmid、Matake、Crossland 和 Papadopoulos 疲劳模型相比，所提出的疲劳模型的寿命预测误差基本在 3 倍以内。