경충돌안전장치용 인장볼트의 충돌특성 평가

Abstract

This paper demonstrates the jig set for the crash test and the crash test results of the tension bolts. The tension bolts are adopted at the light collision safety devices as a mechanical fuse. The kinetic energy due to the crash are absorbed by secondary energy absorbing devices after the fracture of tension bolts. One tension bolt was designed to be failed at the load of 375 kN. The jig set was designed using finite element analysis and installed at the high speed crash tester. The strain gages were attached at the parallel section of the tension bolts to measure the level of the pre-tension acting on the tension bolts. Crash tests were performed with a barrier whose mass was 250 ㎏ and initial speed of the barrier was 9.5 m/sec. The result includes the load response of the tension bolts during the crash tests.