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Fatigue Life and Reliability Analysis of a Parallel Hip Joint Simulator

Published online by Cambridge University Press:  22 February 2021

Feng GuoOpen the ORCID record for Feng Guo[Opens in a new window],
Gang Cheng and
Xin Yuan
Feng Guo
Affiliation:
School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, China, E-mails: guofengcumt@163.com, yxincmee@163.com
Gang Cheng*
Affiliation:
School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, China, E-mails: guofengcumt@163.com, yxincmee@163.comExecutive director, Shandong Zhongheng Optoelectronic Technology Co., Ltd., Zaozhuang, China
Xin Yuan
Affiliation:
School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, China, E-mails: guofengcumt@163.com, yxincmee@163.com
*
*Corresponding author. E-mail: chg@cumt.edu.cn
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Summary

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Aiming at 3SPS+1PS parallel hip joint simulator, the maximum stress of branched chains under the suggested trajectory is obtained by elastodynamic analysis. Based on Corten-Dolan fatigue damage theory and Rain-flow counting method, the dynamic stress of each branched chain is statistically analyzed. The fatigue life prediction shows that branched-chain A2P2C2 is the weakest component for the simulator. Finally, the fatigue reliability is analyzed and the fatigue life and reliability under different structural parameters are discussed. The study shows that the fatigue life of each branched chain can be increased or balanced by increasing structural parameters or exchanging initial motion parameters.

Keywords

Parallel simulator elastodynamicsCorten-Dolan fatigue damage theoryRain-flow counting methodFatigue lifeFatigue reliability

Information

Type
Article
Information
Robotica , Volume 39 , Issue 11 , November 2021, pp. 2079 - 2093
Copyright
© The Author(s), 2021. Published by Cambridge University Press

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