Effect of Water Absorption on the Impact Properties of Carbon Fiber/Epoxy Composites  

作　　者：LU Xiao-jun ZHANG Qi 

机构地区：[1]School of Materials Science and Engineering, Bejing University of Aeronautics and Astronautics, Beijing 100083, China

出　　处：《Chinese Journal of Aeronautics》2006年第B12期14-18,共5页中国航空学报（英文版）

基　　金：aeronautical Science Foundation of China(04A51011)

摘　　要：In this paper, the effects of test temperatures and time on the impact damage behavior of unidirectional carbon fiber reinforced epoxy resin composites, immersed in pure water, on a pendulum impact tester, was studied. The results show that immersion in liquids has a significant effect on the impact resistance of the unidirectional composite material. It is obvious that after immersion, the mass of the material increases. The fracture initiation forces as well as the fracture initiation energy decrease as the immersion time lengthens. Moreover, the higher the temperature and the longer the time are, the more the crack propagation energy and the ductility index will be. Immersion makes the fracture mode change from the dominant fiber fracture into dominant delamination. All in all, immersion decreases the impact resistance of the composites and causes the fracture mode to change.

关 键 词：carbon fiber composites impact damage IMMERSION fracture mechanisms 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ327.3[化学工程—合成树脂塑料工业]