경충돌안전장치용 전단볼트의 준정적 및 동적 전단시험

Abstract

This paper demonstrates the jig set for the crash test and the crash test results of shear bolts which are designed to be failed at train crash conditions. The tension and shear bolts are adopted at Light Collision Safety Devices as a mechanical fuse when tension bolts reach designed failure load. The kinetic energy due to the crash is absorbed by secondary energy absorbing devices after Light Collision Safety Devices off from the main body by the fracture of shear bolts. Single shear bolt was designed to be failed at the load of 250 kN. The jig set was designed to convert a compressive loading to a shear loading and installed at the high speed crash tester. The strain gauges were attached at the parallel section of the jig set to measure the load responses acting on the shear bolts. Crash tests were performed with a barrier whose mass was 250 kg and initial speed of the barrier was 9 m/sec. The results contain quasi-static and dynamic shear tests with two kinds of shear specimens.