Fatigue analysis of leisure chair mechanical device
based on the load time history

HU Chong, HU Kai, YING Fu-qiang, DUAN Li-jiang

                     (Key Laboratory of E&M Ministry of Education & Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract: Aiming at the problem of fatigue damage of leisure chairs, a leisure chair was designed based on ergonomics theory, and the geometric model was established. Methods to analyze the fatigue life of the leisure chair were summarized, and a method was proposed to analyze the fatigue life based on load time history of leisure chair. Then the transient mechanical analysis of the chair was carried out in ANSYS to find out the bars which stress are larger according to the QB/T 4191-2011 standard. Later, the model was verified and the load time histories of the dangerous bars were obtained in the virtual prototype. And the fatigue life analysis of the dangerous rods was conducted based on ANSYS and DesignLife. Finally, the prototype was made and tested. The result shows that the test results are consistent with the results of fatigue analysis, and the accuracy of the method which provides a reference for the related research and analysis is verified.
Key words: leisure chair mechanical device; load time history; fatigue analysis; prototype testing