Experimental Simulation Of Three-dimensional Weaving Damage And Weavability Evaluation Of High-performance Fiber

This paper focuses on the weaving damage of high-performance fibers under threedimensional weaving conditions.Through the establishment of a three-dimensional woven damage experiment simulation device,the deformation and damage mode of high-performance fibers under specific weaving conditions are explored,and the main reasons for the damage of different types of fibers during the weaving process are identified.A set of evaluation methods for high-performance fiber weaveability is established to evaluate the weaveability grades of different types of high-performance fibers and provide guidance for the actual weaving process design.Based on the contact and friction conditions of high-performance fibers in the threedimensional weaving process,a three-dimensional weaving damage experiment simulation device was designed.The device comprises a simulated fiber-heddle damage test unit,a fiber-fiber damage test unit,a fiber-reed damage test unit,and a fiber bending damage test unit.It mainly simulated the influence of fiber tension,weaving rate and other parameters on the damage form and degree of high-performance fiber during the three-dimensional weaving process.The experimental device was used to test the damage of different types of fibers,which verified the test stability of the experimental device.Taking TG800-12 K carbon fiber as the research object,a three-dimensional woven damage simulation study was carried out,and the effects of fiber tension,weaving rate,and wear times on the residual tensile breaking strength of the carbon fiber after a single test unit damage were investigated.And the effect of cumulative damage in multiple units on the residual tensile strength of carbon fiber under variable parameter conditions was studied.The results show that the degree of fiber damage increases with the increase of fiber tension and wear times,while the weaving rate and fiber type have no significant effect on fiber damage.The fracture mode of carbon fiber is mostly brittle fracture.Taking carbon fiber,silicon carbide,silicon nitride,alumina,and glass fiber as the research objects,the influence of four test units on the performance loss of different high-performance fibers was analyzed,and the performance loss rate of the same high-performance fiber in different test units was compared.The results show that the damage of TG800-12 K,T300-6K carbon fiber and glass fiber is mainly caused by the contact extrusion wear between the fiber and fiber.The damage of imported and domestic alumina,silicon nitride,and silicon carbide fibers is mainly caused by bending damage to the fibers.In addition,domestic alumina shows poor wear resistance.According to the various data of the performance loss rate of several high-performance fibers under different damage test units,and based on fuzzy mathematics theory,the statistical experimental results were fuzzy comprehensively evaluated,and the evaluation level of highperformance fiber weaveability was established.The quantified comprehensive evaluation results show that the weaving properties of the seven high-performance fibers are ranked from good to bad: TG800-12 K,T300-6K,glass fiber,silicon carbide,imported alumina,silicon nitride,and domestic alumina.