Gwangwoo Han¹, Joongbae Kim¹, Yongkeun Kwon², Sungbaek Cho³ and Joongmyeon Bae⁴, (1)Mechanical Engineering, KAIST, Daejeon, Korea, Republic of (South), (2)Materials Science and Engineering, KAIST, Daejeon, Korea, Republic of (South), (3)Agency for Defence Development, Daejeon, Korea, Republic of (South), (4)Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, Republic of (South)