缺陷特征对铝合金疲劳性能的研究

Study on Fatigue Performance of Aluminum Alloy with Defect Characteristics

针对铝合金材料,确定不同缺陷特征参数对铝合金疲劳寿命的影响,通过Pearson系数选取与疲劳损伤影响较大的特征参数进行研究,基于Abaqus分析软件建立了缺陷特征的疲劳损伤模型,在特征权重公式的基础上,获得了不同缺陷特征对疲劳性能影响的相对权重,最后达到量化不同缺陷特征对疲劳性能的影响。

For aluminum alloy, the influence of different defect characteristic parameters on the fatigue life of aluminum alloy was determined. Pearson coefficient was selected and the characteristic parameters with great influence on fatigue damage were studied. The damage model of defect characteristics was established based on Abaqus analysis software. The relative weights of the effects of different defect characteristics on the fatigue properties were obtained. Finally, the mesoscopic damage factors were obtained through the multiple linear regression equation, which can effectively characterize the damage degree of aluminum alloy materials.