Mechanism of Functional Responses to Loading of Carbon Fiber Reinforced Cement-based Composites  

作　　者：JIANG Cuixiang LI Zhuoqiu SONG Xianhui LU Yong 

机构地区：[1]College of Science, Wuhan University of Science and Technology, Wuhan 430065, China [2]School of Science, Wuhan University of Technology, Wuhan 430070, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2008年第4期571-573,共3页武汉理工大学学报（材料科学英文版）

基　　金：the National Natural Science Foundation of China Key Project(No.50238040)

摘　　要：Single fiber pull-out testing was conducted to study the origin of the functional responses to loading of carbon fiber reinforced cement-based composites. The variation of electrical resistance with the bonding force on the fiber-matrix interface was measured. Single fiber electromechanical testing was also conducted by measuring the electrical resistance under static tension. Comparison of the results shows that the resistance increasing during single fiber pull-out is mainly due to the changes at the interface. The conduction mechanism of the composite can be explained by the tunneling model. The interfacial stress causes the deformation of interfacial structure and the interfacial debonding, which have influences on the tunneling effect and result in the change of resistance.Single fiber pull-out testing was conducted to study the origin of the functional responses to loading of carbon fiber reinforced cement-based composites. The variation of electrical resistance with the bonding force on the fiber-matrix interface was measured. Single fiber electromechanical testing was also conducted by measuring the electrical resistance under static tension. Comparison of the results shows that the resistance increasing during single fiber pull-out is mainly due to the changes at the interface. The conduction mechanism of the composite can be explained by the tunneling model. The interfacial stress causes the deformation of interfacial structure and the interfacial debonding, which have influences on the tunneling effect and result in the change of resistance.

关 键 词：carbon fiber functional response tunneling effect single pull-out CEMENT 

分 类 号：O656[理学—分析化学]