1. Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China
2. Department of Engineering Mechanics, Zhejiang University, Zheda Road 38, Hangzhou 310027, China
3. Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA