Quasi-static crushing behavior of filament wound carbon fiber/epoxy tube
The filament wound carbon fiber reinforced epoxy (CFRP) composite tubes have been extensively used in a variety of applications due to potential advantages over conventional material made tubes,such as high strength,modulus and specific energy absorption,etc.Effect of structural factor and amide grafted multi-walled carbon nanotubes (MWNTS-NH2) on crushing characteristics of filament wound CFRP tube under quasi-static compression conditon was examined in this study.It was found that CFRP tubes sequentially showed the brittle fracturing mode,the local buckling fracturing mode and transverse shearing fracturing mode with the winding angle increasing,respectively,with the characterizations of mechanical testing,SEM and optical microscopy.Moreover,crack propagation initiated by pre-crack and subsequent failure in the tube were strongly dependent of pre-crack angle due to deflection and penetration competition of crack evolution.The simulated compression failure behavior correlated well with the experimental results,revealing that the Chang-Chang failure criteria was effective in representing the quasi-static crushing characteristics of the tube.In addtion,the a-MWNTs were sucessfully obtained by multi-step functionization.The compressvie properties of the tubes were significantly improved by the addition of the a-MWNTs due to their uniform dispersion and high interfacial chemical reactivity,whereas the as-received MWNTs and other functionalized MWNTs were not as effective.
winding angle pre-crack angle crushing characteristics multi-walled carbon nanotubes
ZHU Jinming LI Wenbin YANG Guang JIA Xiaolong YANG Xiaoping
State Key Laboratory of Organic-inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China
国内会议
北京
英文
38-42
2013-09-10（万方平台首次上网日期，不代表论文的发表时间）