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本文介绍了关于用玻璃纤维、碳纤维和Kevlar-49纤维增强的交叉铺敷(0/90)的环氧树脂层压板之疲劳形为的一系列试验的结果,特别是关于环境调节对疲劳性能的影响。所使用的调节处理包括在进行重复拉伸和弯曲疲劳试验以前的干燥、在相对湿度为65％的大气中储存以及水煮。碳纤维增强塑料(CFRP)的耐疲劳性能不受调节处理和施加应力方式的影响;对玻璃纤维增强塑料(GRP)来说,干燥的材料与65％相对湿度(RH)下调节处理的材料两者在性状上没有显著差异。另一方面,水煮总会降低GRP和KFRP性能,但除了进行拉伸试验的0/90°取向的GRP之外,都影响很小。在0/90°取向的GRP情况下,性能的大幅降低直接原因是预调节处理过程中纤维强度的损失。进行完全干燥处理对KFRP层压板的损坏程度比水煮处理更大。
This paper presents the results of a series of experiments on the fatigue behavior of cross-coated (0/90) epoxy laminates reinforced with glass fibers, carbon fibers and Kevlar-49 fibers, especially with respect to fatigue performance influences. Conditioning treatments used included drying prior to repeated tensile and flexural fatigue tests, storage in an atmosphere of 65% relative humidity, and boiling. The fatigue resistance of Carbon Fiber Reinforced Plastic (CFRP) is unaffected by conditioning and stressing methods; for GRP, both dry material and 65% relative humidity (RH) conditioned material There are no significant differences in traits. On the other hand, boiled water always lowers the GRP and KFRP properties but has little effect except for 0/90 ° oriented GRP for tensile testing. In the case of GRP 0/90 ° orientation, a significant reduction in performance is directly attributable to the loss of fiber strength during preconditioning. KFRP laminates were damaged more completely than boiled for complete drying.