1. School of Mechanical and Electrical EngineeringUniversity of Electronic Science and Technology of China Chengdu 611731 China
2. Center for System Reliability and SafetyUniversity of Electronic Science and Technology of China Chengdu 611731 China
3. INEGI, Faculty of EngineeringUniversity of Porto Porto 4200‐465 Portugal
4. Faculty of Mechanical Engineering, Department of Mechanics, Materials Science and EngineeringWroclaw University of Science and Technology Smoluchowskiego 25 50‐370 Wroclaw Poland