1. Agency for Defense Development, Yuseong, Daejeon 305-600, Republic of Korea
2. Korea Institute of Construction & Transportation Technology Evaluation and Planning, Anyang, Gyeonggi-do 431-060, Republic of Korea
3. Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, Seoul, 139-743, Republic of Korea
4. Department of Materials Engineering, Gangneung-Wonju National University, Gangneung, Gangwon-do 210-702, Republic of Korea