Fatigue life prediction under a requested failure probability is essential to the modern engineering design process. Hence, the validation of multiaxial life prediction models is important with regard to not only the median fatigue lives but also their ability to estimate the failure probability. Herein, the concept of life-dependent material parameters is enhanced by introducing the fatigue life scatter assessment methodology. Aiming to analyze the ability of the life-dependent material parameter concept to calculate the failure probability distribution, we verified this concept’s new ability on a set of stress-based fatigue criteria and new experimental results on 7075-T651 aluminum alloy.

在要求的故障概率下进行疲劳寿命预测对于现代工程设计过程至关重要。因此，多轴寿命预测模型的验证不仅对于中值疲劳寿命，而且对于估计失效概率的能力也很重要。在此，通过引入疲劳寿命散布评估方法，增强了与寿命相关的材料参数的概念。为了分析与寿命相关的材料参数概念计算失效概率分布的能力，我们在一套基于应力的疲劳准则上验证了该概念的新能力，并在7075-T651铝合金上验证了新的实验结果。