摘要
In this paper two set of GFRP specimens are manufactured and tested to investigate the relaxation behaviour under cyclic loading in the longitudinal and transversel direction. The relaxation of GFRP unidirectional laminates is evident for both cyclic loadings. Under longitudinal cyclic loading the relaxation is dependent on the number of loading cycles. Under transverse loading the relaxation depends on the loading cycles as well as the time of loading. Two expressions are set up to describe the relaxation for the longitudinal and transverse loading, and the predictions agree well with the experimental data.
研究了在常幅疲劳载荷作用下玻璃纤维树脂基复合材料单向板的纵向和横向应力松弛行为。实验结果表明:玻璃纤维树脂基复合材料的纵向和横向应力松弛是十分明显的。纵向应力松弛主要取决于载荷的循环次数,而横向应力松弛还取决于加载时间。文中提出了描述纵向和横向应力松弛行为的两个表达式。
