Research On The Friction And Wear Behavior Of Carbon Fiber In Weaving

In this paper,the mechanical loss and the friction mechanism of carbon fibre tows in the weaving process was investigated by establishing the three-dimensional weaving process experimental simulation.The range of fiber damage caused by the weaving process is predicted,which provides a theoretical basis for optimum design the process parameters of three-dimensional woven fabrics and composite materials.The friction between the warp yarn and the reed dent during the beating up process was simulated,the results showed the carbon fibre tows are rearranged under the action of the normal load,the friction force and friction coefficient of carbon fibre tows are increased with the increase of actual contact area between the carbon fibre tows and the reed dent.The degree of wear increases with the increase of the normal load,resulting in a gradual decrease in the mechanical properties of the yarn.The pre-tension applied in the experiment has little effect on the friction properties of the carbon fibre tows and the reed.The increase of the friction rate makes the carbon fibre tows susceptible to fatigue damage and induce plastic deformation accumulation,resulting in an increase in the friction and friction coefficient of the carbon fibre tows.The simulation of the warp and weft yarns in the weaving process shows that the friction coefficient of the carbon fibre tows decreases with the increase of the normal load,and the wear degree increases with the increase of the normal load,and the tensile strength of corresponding carbon fibre tows decreases gradually.The friction force and friction coefficient of the carbon fibre tows increase with the increase of the pre-tension due to the change in the actual friction contact area.The increase in friction rate hardly affects the friction and friction coefficient of the carbon fibre tows,but prolongs the number of cycles required for the test value to stabilize.In order to verify the friction behavior between warp yarn and reed dent and between warp and weft yarn under different pressure during beating-up,2.5D woven fabrics with different warp and weft densities were designed and weaved respectively.By comparing and analyzing the tensile properties of the warp and weft yarns in the experimental simulation and the actual weaving,the correlation between the mechanical property loss and the normal pressure of the yarn were studied.And the loss rate of mechanical properties of 2.5D woven fabrics and their composites due to friction and wear of warp and weft yarns during actual weaving process was tested.The results showed that the decrease of fabric tensile properties caused by fiber damage in weaving is greater than that of composite materials.