복합재 철도차량 차체의 피로내구시험 철차에 대한 연구

초록

This paper explains the fatigue test procedure of a composite train carbody. The composite carbody with length of 23m was manufactured as a sandwich structure composed of a 40mm-thick aluminium honeycomb core and 5mm-thick woven fabric carbon/epoxy face. In order to evaluate fatigue strength of the composite carbody, the carbody will be excited by two 50-ton capacity hydraulic actuators. The excitation frequency will be measured by natural frequency evaluation test under full weight condition. The test The fatigue test is to be conducted for 2x106cycles. During the fatigue test, the nondestructive tests using X-ray and liquid penetrant will be performed. From crack detection tests, the location and fatigue crack progress will be investigated.