Applied Sciences | |
An Improved Nonlinear Cumulative Damage Model Considering the Influence of Load Sequence and Its Experimental Verification | |
Jianmin Li1  Huanguo Chen1  Wei Wang1  Jun Pan1  Wenhua Chen1  | |
[1] National and Local Joint Engineering Research Center of Reliability Analysis and Testing for Mechanical and Electrical Products, Zhejiang Sci-Tech University, Hangzhou 310018, China; | |
关键词: nonlinear cumulative damage; loading sequence; fatigue damage; toughness dissipation; two-level loading; | |
DOI : 10.3390/app11156944 | |
来源: DOAJ |
【 摘 要 】
According to the change characteristics in the toughness of the metal material during the fatigue damage process, the fatigue tests were carried out with the standard 18CrNiMo7-6 material. Scanning the fracture with an electron microscope explains the lack of linear cumulative damage in the mechanism. According to the obtained results, a nonlinear damage accumulation model which considered the loading sequence state under the toughness dissipation model was established. The recursive formula was devised under two-level. The fatigue test data verification of three metal materials showed that using this model to predict fatigue life is satisfactory and suitable for engineering applications.
【 授权许可】
Unknown