1. Department of Mechanics, School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2. Department of Mechanics, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, China
3. Department of Civil, Construction and Environmental Engineering, North Dakota State University, Fargo, North Dakota 58108, United States
4. Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
5. Department of Aerospace Engineering, Iowa State University, Ames, Iowa 50011, United States