摘要
在温度为70℃、相对湿度为85%的湿热环境下,分别对T700碳纤维/环氧树脂基复合材料、T300碳纤维/环氧树脂基复合材料以及两种复合材料/金属胶接结构进行了70 d的加速老化试验,并对老化前后的试样进行了力学性能试验和无损检测。结果表明:湿热环境没有改变两种复合材料的破坏模式,但使复合材料的纵、横向压缩强度和剪切强度略有降低;对复合材料/金属胶接结构,湿热老化环境不会导致胶接界面产生损伤,但会使胶接强度下降;老化前两种复合材料的力学性能基本相当,老化70 d后T700碳纤维/环氧树脂基复合材料的性能保持率略优。
Accelerated aging experiments of T700 and T300 carbon fiber/epoxy resin composites, as well as two types of composite/metal adhesive joints were carried out respectively for 70 d in a hot-wet environment with temperature of 70 ℃ and relative humidity of 85%. Mechanical property tests and nondestructive test （NDT） of the samples before and after aging were also performed. The results show that the hygrothermal environment did not change the failure modes of the two types of composite samples, but decreased slightly the longitudinal/lateral compressive strength and shear strength. For composite/metal joints, the hydrothermal environment could not bring about damage at the bonding interface, but could bring down its shear strength. The mechanical properties of T700/ epoxy resin composite were equivalent to those of T300/epoxy resin composite before aging, while the former was superior to the latter in respect to the property eonservation percentage after aging for 70 d.
出处
《机械工程材料》
CAS
CSCD
北大核心
2009年第6期48-51,共4页
Materials For Mechanical Engineering
关键词
复合材料
湿热老化
加速试验
性能保持率
composite
hydrotherrnal aging
accelerated experiment
property conservation percentage
