1. College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, P.R. China
2. College of Aeronautics and Astronautics, Taiyuan University of Technology, Taiyuan, P.R. China
3. Beijing Key Laboratory of Civil Aircraft Structures and Composite Materials, Beijing Aircraft Technology Research Institute, Beijing, P.R. China
4. Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC, USA