Numerical Simulation Of Mechanical Properties Of Carbon Fiber Polyimide Resin Composite Frame

Today,hypersonic aircraft is being developed by many countries.Carbon fiber polyimide resin composite material is widely applied in hypersonic aircraft,because of its excellent performance.The requirement of material become higher and higher because of the aerothermal heating effect in the hypersonic flight.The performance of composite material decreases when the temperature increasing,therefore it is much important to study the properties of composite materials under high temperature for the practical engineering application.This paper use the finite element analysis methods to study the strength and mechanical properties of the hypersonic aircraft frame that is made of carbon fiber polyimide resin composite material(HT3/KH-304),and analyze the calculation result at normal temperature and high temperature.This paper first introduce the classical lamination theory used in calculation,progressive damage analysis method and some strength theories.Tsai-Wu strength theory is used to analysis and calculate,after comparing the difference between the strength theories.Based on the Tsai-Wu strength theory and progressive damage analysis method,this paper use the finite element analysis software Abaqus to build the shell model of frame structure.At last,the nonlinear finite element model is built,after determining the appropriate type of element and max damage degradation parameter.After building the model,this paper calculate the model under different load both in the normal temperature and high temperature.Then the results are processed to analysis the mechanical properties of the composite frame at different temperature.The critical failure loads are predicted by progressive damage analysis method.The performance of composite frame at high temperature is analyzed by comparing the result at different temperature.This paper can provide the references to application of the composite material for hypersonic aircraft.Finally,this paper prospects the next research work,hoping to provide some references for engineering application.