【作者】 刘亮； 郭海丁； 刘小刚； 王霄翔；

【Author】 Liu Liang;Guo Haiding;Liu Xiaogang;Wang Xiaoxiang;Nanjing University of Aeronautics and Astronautics,Jiangsu Province Key Laboratory of Aerospace Power System;

【机构】 南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室；

【摘要】 本文针对钛合金Ti17电子束焊接头多轴疲劳寿命评估问题展开研究。作者采用空心薄壁圆管试件对Ti17电子束焊接头展开了多轴疲劳试验,并采用流行的多轴疲劳模型对其寿命进行评估。本文涉及的多轴疲劳模型考虑了材料性能、加载模式的影响,对相关参数进行修正。修正后的多轴疲劳损伤控制参量用于Ti17电子束焊接头多轴疲劳寿命预测取得了良好的效果。更多还原

【Abstract】 In this paper, the multi-axial fatigue behavior of electron beam welded(EBW) joints of titanium Ti17 is studied. The thin wall EBM specimens of Ti17 are used in the multi-axial fatigue test and several multi-axial fatigue models are studied in the evaluation of the EBW joints fatigue life of Ti17. A new fatigue criterion under multi-axial load is proposed which can be used to consider the effects of material properties, loading models and the different load phases. This modified multi-axial fatigue model gives good agreement in the evaluation of multi-axial fatigue life for the EBW joints of Ti17.更多还原