원공공차를 가진 볼트 조인트와 핀 조인트의 강도평가에 관한 연구
A Study on the strength of the Bolted Joint & Pin Joint with Hole Clearance
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초록
복합재료가 기계부품 및 항공기 구조물에 폭 넓게 적용됨에 따라, 복합재료 구조물에서 가장 취약한 복합재료 체결부의 설계는 매우 중요한 연구 분야로 대두되고 있다. 본 논문에서는 다양한 원공공차를 가지는 복합재료 볼트 조인트와 핀 조인트의 강도를 상호 비교하였다. 실험결과로부터 조인트의 원공공차가 880 ㎛일 때 원공공차가 0 ㎛ 보다 첫 번째 파손하중의 볼트 조인트는 24.2 %, 핀 조인트는 51.3 %의 강도저하가 발생되었다. 또한, 이에 대한 유한 요소 해석을 수행하여 파손지수를 계산하고 실험값과 상호 비교하였다.
Abstract
With the wide application of fiber-reinforced composite material in aero-structures and mechanical parts, composite joint have become a very important research area because they are often the weakest sites in composite structures. In this paper, the failure strengths of the bolted joint and pin joint which have variable hole clearance were evaluated and compared. From the tests, the first failure loads of the bolted joint and pin joint with 880 ㎛ hole clearance have decreased by 24.2 % and 51.3 % compared to those of joints with 0 ㎛ hole clearance, respectively. Also, the failure index of the joints were calculated by the finite element method and compared with experimental results.
참고문헌 (10)
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