碳纤维束间的摩擦磨损特性

为了对碳纤维束的磨损程度进行定量分析以及探索碳纤维束间摩擦磨损机制，采用自制的摩擦模拟实验装置，研究了摩擦次数、加载力、摩擦角度对碳纤维束摩擦损伤的影响。通过对比摩擦前后碳纤维束的拉伸断裂强力、毛羽量和表面浆膜形态评价了其磨损程度。结果表明:随着摩擦次数、加载力的增大，碳纤维束的磨损程度逐渐加剧；当摩擦角度在90°~30°范围变化时，碳纤维束的拉伸断裂强力随着角度的减小而小幅度下降；而当摩擦角度为0°时，碳纤维束的拉伸断裂强力急剧下降。同时，结合纤维束接触理论和黏性薄膜压痕法揭示了碳纤维束摩擦损伤机制，发现有效接触面积的变化是导致碳纤维束磨损程度改变的主要因素，且纤维束间的有效接触面积随加载力的增大而增大，随摩擦角度的增大而减小。 

Frictional and worn behavior of inter-carbon fiber tows

In order to quantitatively evaluate the worn degree of carbon fiber tows and investigate the mechanism of friction and wear between carbon fiber tows, a frictional simulation device was designed to study the effects of frictional cycle times, loading force and frictional angle on the abrasion of carbon fiber tows. The worn degree was characterized by comparing tensile strength at break, surface morphology and the amount of hairiness of the carbon fiber tows before and after friction. The results show that the wear of carbon fiber tows gradually increases with the increase of frictional cycle times and loading force. As the frictional angle changes from 90° to 30°, the tensile strength at break of the carbon fiber tows decreases slightly as the angle decreases. However, when the frictional angle is 0°, the tensile strength at break of the carbon fiber tows has a significant decrease. The wear mechanism of carbon fiber tows was explained by combining with fiber tow contact theory and viscous film indentation method. The results reveal that the contact area is the main factor causing the worn degree of fiber tows. The real contact area between fiber tows increases with the the loading force increasing and decreases with the frictional angle increasing.