Abstract
This paper describes the characteristics of tensile fatigue in GFRP tube(±45deg) under dynamic cyclic loading at room temperature and 77K. Dynamic cyclic loading tests were conducted at three levels of the maximum stress and the cyclic frequency 10Hz. The relationship between the visco-elastic plastic properties and the internal fatigue damage was investigated at each stress level. The fatigue strength at cryogenic temp, was greatly improved in the range of this study. However, change of the apparent stiffness and hysteresis loss of the specimen were similar behavior.therefor ,similar fatigue damage mechanisms were conjected at each temperature.
