Fatigue Test of the Hybrid Composite Carbody for Korean Tilting Train

摘要

This paper explains the fatigue test of a composite train carbody. The composite carbody with length of 23 m was manufactured as a sandwich structure composed of a 40 mm-thick aluminum honeycomb core and 5 mm-thick CF1263 woven fabric carbon/epoxy face. In order to evaluate fatigue strength of the composite carbody, it was excited by two 50-ton capacity hydraulic actuators installed under the body bolster. The excitation frequency was determined by natural frequency evaluation test under full weight condition and was 5 Hz. The fatigue test was conducted for 2 X 106cycles. During the fatigue test, the nondestructive tests using X-ray and liquid penetrant was performed to evaluate the fatigue cracks. From the test, there were no fatigue cracks.