1. Department of Aeronautics and Astronautics, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
2. Department of Aerospace Engineering, Tohoku University, 6-6-01, Aza-Aoba, Aramaki, Aobaku, Sendai, Miyagi 980-8579, Japan
3. Department of Materials Science and Engineering, University of Washington, BOX 352120, Seattle, Seattle, WA 98195, USA
4. Research Center for Structural Materials, Polymer Matrix Hybrid Composite Materials Group, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan