Carbon fiber tows are used as reinforcement material in composite elements. To ensure mechanical integrity of the composite structure, it is important to ensure a good positioning of the carbon fibers in the mold during the manufacturing process. The positioning of the carbon fiber tows depends greatly on the friction with the mold. In the present paper, the friction between a carbon tow placed on a cylindrical pin rubbing against a rotating glass disk is experimentally studied in both dry and resin-lubricated conditions on a dedicated tribometer. The tests are performed for different loading levels and sliding speeds. The results are compared to numerical simulations taking into account contact mechanics and lubrication. The tows are modeled using a simple elastic foundation approach coupled with the Reynolds equation when the resin flow is considered. It appears that the impact of the deformability of the tow on its frictional behaviour is significant. It conditions the transition between mixed and hydrodynamic lubrication regimes.

中文翻译：

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碳纤维丝束润滑滑动从混合状态到流体动力状态

碳纤维丝束用作复合材料元件中的增强材料。为了确保复合材料结构的机械完整性，在制造过程中确保碳纤维在模具中的良好定位非常重要。碳纤维丝束的定位很大程度上取决于与模具的摩擦力。在本文中，在干燥和树脂润滑条件下，在专用摩擦计上对放置在圆柱形销上的碳丝束与旋转玻璃盘摩擦的摩擦力进行了实验研究。测试针对不同的负载水平和滑动速度进行。将结果与考虑接触力学和润滑的数值模拟进行比较。当考虑树脂流动时，使用简单的弹性基础方法结合雷诺方程对丝束进行建模。看来丝束的变形能力对其摩擦行为的影响是显着的。它调节混合润滑状态和流体动力润滑状态之间的过渡。