1. Hunan Key Laboratory of Advanced Fibers and CompositesSchool of Aeronautics and Astronautics, Central South University Changsha 410083 People's Republic of China
2. School of Materials Science and EngineeringNanyang Technological University 50 Nanyang Avenue, Singapore 639798 Singapore
3. Department of Civil and Environmental EngineeringThe University of Vermont, Burlington, VT 05405
4. Department of Mechanical and Aerospace EngineeringThe Hong Kong University of Science and Technology, Clear Water Bay Kowloon Hong Kong