1. School of Mechanical Engineering Yanshan University Qinhuangdao China
2. Key Laboratory of Self‐Lubricating Spherical Plain Bearing technology of Hebei Province Yanshan University Qinhuangdao China
3. Aviation Key Laboratory of Science and Technology on Generic Technology of Self‐Lubricating Spherical Plain Bearing Yanshan University Qinhuangdao China
4. School of Civil and Mechanical Engineering Curtin University Perth Western Australia Australia