유리섬유/에폭시 4-매 주자직 적층 복합재료의 인장-압축 하중하의 피로수명 평가

초록

This paper describes the evaluations of tension-compression fatigue characteristics and life for glass fiber/epoxy laminate composite applied to railway bogie to reduce weight. Test samples of tension-compression fatigue were composed of glass fiber/epoxy 4-harness woven laminate composites with different stacking sequence of warp-direction, fill-direction and ±45°-direction. The tension-compression fatigue test was conducted with stress ratio (R) of -1 and frequency of 5Hz. Anti buckling jig was designed for prevent buckling of specimen under compression load. The fatigue characteristics and life of glass fiber/epoxy 4-harness satin woven laminate composite was compared with that of SM490 commonly used to the railway bogie frame. The test results showed that glass fiber/epoxy 4-harness satin woven laminate composite with stacking sequence of fill-direction had a good of fatigue characteristic in comparison with that of SM490. Also, Glass fiber/epoxy 4-harness satin woven laminate composite was beneficial for fatigue life via weight in comparison to bogie frame made of SM490.