Abstract
본 논문에서는 머리 부분의 손상 감소를 위한 소방용 헬멧에 충격하중을 가했을 경우에 나타나는 기계적 거동을 유한요소법으로 해석하였다. 컴퓨터 시뮬레이션에서는 소방용 및 오토바이용 헬멧 모델에 대해 충격하중에 따른 거동을 비교하였다. 해석은 ABAQUS 소프트웨어를 사용하였으며 헬멧의 정점, 전면, 후면 및 측면 등 각각의 경우 5개 위치를 선정하여 충격하중에 대한 품질 인증요구사항인 1.5 m 높이의 자유낙하 시험을 모사하였다. 본 연구의 주요 결과로 충격 변형의 안전여부는 해석 내용을 반영하여 분석하였다. 재질에 따른 두 모델의 해석결과에서는 동일한 충격 순간에 매우 다른 충격 흡수성을 보임으로서 본 논문의 시뮬레이션 적용이 헬멧의 설계 및 평가에 유용하게 이용될 수 있음을 확인하였다.This paper investigates the mechanical behavior of firefighter helmets which may reduce the head injuries on accidental impact by using the finite element method. ABAQUS software is employed to analyse computer models of helmets in which the 5 positions for each of top, front, rear, side portion of helmet are chosen to impose the impact load which is the energy falling freely from 1.5 m height upon the standard reference. The major results from this study are to assay the safety from deformation under impact which is obtained by the simulations. It is found that their impact responses show big differences in impact behavior even subjected to the identical load condition; the finite element modeling and analysis are believed to provide very important and efficient tool for helmet design and performance evaluation.
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