Study on the Numerical Simulation Methodology of Kevlar Fabric Wraps Structure under the Impact of High-Speed Rotating Blade

According to the aero-engine containment structure application and loads, the numerical simulation method of Kevlar fabric wrap structure under the impact of high-speed rotating blade was studied and compared with test results. The mechanical properties of Kevlar fabric were investigated firstly, including static and dynamic tension, shear, and friction. Some test methods and fixtures were developed. The response behavior of Kevlar fabric under different loads were obtained and analyzed. Then MAT-214 material model in LS-DYNA was studied to characterize the Kevlar fabric, and the data obtained by the mechanical properties tests were applied. The numerical simulation model of subscale casing and blade was established to simulate the impact process of casing and rotating blade. The casing is composed of an inner thin aluminum ring and outer wrapping Kevlar fabric. The fabric was modeled as continuum by using shell element. The effect of mesh size and shell element layers was discussed. The impact process was analyzed, and it matched well with the high-speed photography. The blade kinetic energy and fabric deformation of simulation and test results also matched well.