中文摘要：

讨论了依附于树脂基体中碳纤维间在微米尺度下的接触导电现象，分析了不同受载阶段下碳纤维搭接处的电阻响应规律。碳纤维接触处受到外加载荷局部有应变产生时，其接触处电阻的力阻响应规律可分为不同的两个阶段：第1阶段搭接处电阻表现出随着压应变的增大而同步线性地减小；第2阶段中纤维间的接触电阻发展为由隧道效应产生的非接触电阻，随着拉伸载荷的增大，搭接处电阻同步增大。

英文摘要：

The contact resistance between the carbon fiber monofilament before and after loading under micro- meter scale was discussed. With taking the experiments of mechanical resistance and tunnel effect, contact re- sistance with two adjacent fibers had different corresponding style to the loading within different loading proce- dure. In the first procedure the contact resistance decreased linearly with larger tension strain. In the second procedure the contact resistance which was caused by tunnel effect becomes higher with larger tension.