磨削纤维角对碳纤维复合材料磨削性能的影响

为了研究单向碳纤维复合材料在不同磨削纤维角(磨削方向与纤维取向之间的夹角)下表面的磨削特性和机理,通过一系列磨削实验,研究了磨削纤维角对磨削力、粗糙度和表面形貌的影响,并用扫描电镜(SEM)对磨削加工表面的特征进行了分析。结果表明:不同磨削纤维角下的磨削力遵循45°>90°>0°的顺序;表面粗糙度恰好与此相反,磨削纤维角为0°时拥有最差的表面粗糙度;不同磨削纤维角产生不同的损伤形式,磨削纤维角为0°时材料去除机制是以弯曲破坏为主,90°时以剪切破坏为主,45°时则是由弯曲和剪切破坏共同作用导致。

Effect of Grinding Fiber Angle on Grinding Performance of Carbon Fiber Composites

In order to study the grinding characteristics and mechanism of unidirectional carbon fiber composites under different grinding fiber angles(angle between grinding direction and fiber orientation).The effects of grinding fiber angle on grinding force,roughness and surface morphology were studied by a series of grinding experiments.The characteristics of the ground surface were analyzed by scanning electron microscopy(SEM).The results show that the grinding force at different grinding fiber angles follows the order of 45°>90°>0°;the surface roughness is just the opposite,the worst surface roughness is obtained when the grinding fiber angle is 0°;The grinding fiber angle produces different damage forms.When the grinding fiber angle is 0°,the material removal mechanism is mainly bending failure,at 90°,shear damage is dominant,and at 45°,it is caused by bending failure and shear failure.