Measurement of slippage coefficient between fiber and mandrel surface for non-geodesic filament winding

Based on the stable winding condition of the general surface, a method for measuring the slippage coefficient was established. A special mandrel was proposed, which has a designed meridian profile that enables a linearly proportional relation between the cross-sectional radius and the measured values of the slippage coefficient. With the special mandrel, the slippage coefficient between carbon fiber/glass fiber and aluminum mandrel surface was obtained under several different typical filament-winding process parameters, such as winding speed, winding tension, resin viscosity, and so on. The experimental results show that this method can obtain the slippage coefficient easily and provide a reference for non-geodesic fiber path design.