摘要
碳纤维水泥基复合材料具有应变-电阻效应。通过碳纤维水泥基复合材料单丝拉伸实验,探究碳纤维水泥基复合材料载荷作用下电阻变化的主要因素。结果表明,在纤维拔出过程中,试样电阻随界面力增大而增大,界面力达到最大值时电阻迅速增大。试样电阻变化规律与界面结构变化一致,弹性变形导致的电阻变化可逆。碳纤维拔出过程中试样电阻的变化主要是由碳纤维—水泥基体界面因素引起的。
The carbon fiber cement has compression sensibility. Many researches are made on compression sensitivity of cement based materials with the development of cementitious materials and the new request for cement based composite. In this paper, the compression sensitivity of carbon fiber concrete is analyzed based on single fiber pull-out testing on the basis of predecessors＇ researches. The results show that the resistance increase with tensile displacement increasing. When the interracial bonding force reaches its maximum, the bond between fiber and matrix is broken completely, and the resistance increases abruptly. In the meantime, the variation of resistance of single fiber pull-out under cyclic loading is studied. The resistance change caused by the elastic deformation is reversibility. The change in resistance is in accord with the chance in interface.
出处
《重庆科技学院学报（自然科学版）》
CAS
2009年第6期65-68,共4页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
关键词
碳纤维
水泥基
复合材料
压敏性
界面
carbon fiber
cement-based
composites
compression sensitivity
interface
