Heracron 직물의 고속 충돌 해석
Computational analysis of Heracron fabric at high-velocity impact
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초록
고성능 직물은 방탄, 방검 등의 개인 보호구뿐만 아니라, 우주보호시스템, 차량방탄 등 다양한 분야에서 활용되고 있다. 또한 고성능 직물의 성능향상을 위한 다양한 종류의 연구가 진행되었고, 동시에 많은 해석 방법들이 개발되어 왔다. 본 연구에서는 고속 및 초고속 충돌, 충격 현상 등에 특화된 상용해석 프로그램인 Autodyn 을 사용하여 국산 고성능 직물인 Heracron 의 고속 충돌 현상을 최초로 모사하였다. Heracron 직물에 사용된 입력 물성치별 민감도를 확인하는 해석을 수행하였다. 시험의 검증을 위해 2단 경 가스건을 사용하여 직물 1, 3, 5장의 시편을 약 200-500 m/s 의 알루미늄 구체의 충돌시켜 전 후 속도를 측정하였다. Autodyn 프로그램을 이용하여 Heracron 직물의 고속 충돌 현상을 성공적으로 구현하였다.
Abstract
Advanced fiber fabrics have been utilized in not only anti-stabbing and bullet-proofing for body armor but also various industrial fields including vehicular armor and spacecraft structure. Furthermore, there have been a number of research to improve the ballistic performance of advanced fabrics introducing many computational approaches. In our research, an advanced fabric, Heracron manufactured in South Korea was modelled firstly using Autodyn, a commercial software specializing in impact and explosion phenomenon. The sensitivity of the input parameters was also confirmed by conducting simulations. To verify the numerical modelling, we measured and compared the simulation results with velocity decrements after impact involving one, three, and five layers of Heracron under 200-500 m/s impacts by an aluminum spherical projectile. The Heracron fabric was successfully modelled using Autodyn.
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