Abstract The effects of pore size and position on the local stress are characterized by a parameter P dH . This parameter is then introduced into the elastic fatigue damage model to equivalently reflect the influence of pore. The proposed fatigue damage model is numerically implemented to predict fatigue lives of the joints with different pores, and the results agree well with the experimental data. The sensitivity analyses of fatigue life to the pore parameters are investigated for most common pores in practice. An approximate linear relationship is also obtained between the logarithm of the pore indictor parameter P dH and the predicted fatigue life.

中文翻译：

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考虑内孔尺寸和位置影响的基于连续损伤力学的焊接接头疲劳分析模型

摘要 孔径和位置对局部应力的影响由参数P dH 表征。然后将该参数引入弹性疲劳损伤模型，等效反映孔隙的影响。对所提出的疲劳损伤模型进行了数值计算，以预测不同孔隙接头的疲劳寿命，结果与实验数据吻合良好。在实践中研究了大多数常见孔隙的疲劳寿命对孔隙参数的敏感性分析。在孔隙指标参数 P dH 的对数和预测的疲劳寿命之间也获得了近似的线性关系。