标题：Fatigue behavior and influence factor analysis of the structure subject to multiaxial random loading
作者：He, Guangzong; Chen, Huaihai; He, Xudong
作者机构：[He, Guangzong] Shandong Univ Technol, Sch Transportat & Vehicle Engn, Zibo 255049, Shandong, Peoples R China.; [Chen, Huaihai; He, Xudong] Nanjing 更多
通讯作者地址：[Chen, HH]Nanjing Univ Aeronaut & Astronaut, Aerosp Coll, Nanjing 210016, Jiangsu, Peoples R China.
来源：JOURNAL OF VIBROENGINEERING
关键词：multiaxial vibration; stress response; failure mode; correlated inputs
摘要：The fatigue behavior of the structure under multiaxial random loading is studied in this paper. The influence of different parameters on the fatigue behavior is mainly investigated. Firstly, the theoretical analysis for the stress response of the structure under multiaxial random vibration is developed, and the relationship of the stress responses between multiaxial and sequentially applied uniaxial random vibration is obtained, which indicates that the potential failure modes will be different. Then, the experiments are conducted to compare the failure mode between uniaxial and multiaxial inputs (uncorrelated). As anticipated, the experimental results show significantly difference in the fatigue life, failure position and the way of crack propagation. Finally, the correlation between different axial input loads and its influence on the failure mode are investigated experimently. Based on the experiment, the relationship between the failure mode and the correlation coefficient as well as the phase of the input loads are also obtained.