A Modified Cumulative Damage Model for Fatigue Life Prediction under Variable Amplitude Loadings

摘要：

　　To evaluate the fatigue damage accumulation and predict the residual life of components at different stress levels,this paper proposed a modified cumulative damage model based on the strain energy density parameter.Noting that mean stress and load interaction under uniaxial fatigue loading exhibit significant effects on fatigue damage accumulation and life prediction.According to this,a new model based on damaged stress model which considers the effects of mean stress and load interaction was presented in this paper.The proposed model was verified by using four experimental data sets of aluminium alloys and steels.The experimental results are compared with those of the Miner’s rule,damaged stress model (DSM) and damaged energy model (DEM).Results show that the proposed model agrees better with the experimental observations than others.

关键词： Fatigue life prediction Mean stress Load interaction W(o)hler curve

作者: Peng Yue Qiang Lei Chenglin Zhang Shun-Peng Zhu Shun-Peng Zhu

作者单位: School of Mechatronics Engineering,University of Electronic Science and Technology of China,Chengdu, Shanghai Aerospace Equipments Manufacturer,Shanghai,200245,China

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 62-66

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）