1. School of Mechanical EngineeringYanshan University Qinhuangdao, 066004 People's Republic of China
2. Aviation Key Laboratory of Science and Technology on Generic Technology of Self‐Lubricating Spherical Plain BearingYanshan University Qinhuangdao, 066004 People's Republic of China
3. School of Mechanical EngineeringShandong University of Technology Zibo, 255049 People's Republic of China
4. Department of Mechanical EngineeringSchool of Civil and Mechanical Engineering, Curtin University Perth Western Australia, 6845 Australia