Simulation Analysis Of The Strength Of Carbon Fiber Composite Material Equipment Cabin Floor

With the rapid development of my country’s high-speed railways,the requirements for the performance and lightweight of trains are becoming increasingly urgent.Compared with traditional metal materials,composite materials are lighter in weight and have excellent mechanical properties.They have received extensive attention in lightweight design.It is of great significance to study the application of composite materials in the field of rail transit.This paper takes the carbon fiber composite equipment cabin floor structure of the EMU as the research object.Based on the progressive failure analysis method,using the finite element software Abaqus combined with the subroutines UMAT and VUMAT,the static strength and low-speed impact simulation analysis of the carbon fiber composite equipment cabin floor are carried out respectively.,The main work content is as follows:Based on the progressive failure analysis method,the static strength simulation analysis of the carbon fiber equipment cabin floor is carried out.The UMAT subroutine was written,the model in the literature was simulated and analyzed and the results were compared to verify the correctness of the subroutine.The static strength simulation analysis model of the carbon fiber equipment cabin floor was established,and the Abaqus/Standard implicit analysis module was used.Based on the failure factor and strain,the static strength simulation analysis was carried out under the working conditions specified in the IEC61373 and EN12663 standards,and the failure load of the structure was obtained.Based on the progressive failure analysis method,the low-speed impact simulation analysis of the carbon fiber equipment cabin floor is carried out.The VUMAT subroutine was written,and the correctness of the subroutine was verified by comparing the simulation and the results in the literature.The low-speed impact simulation model of the carbon fiber equipment cabin floor was established,and the Abaqus/Explicit explicit analysis module was used to perform low-speed impact simulation analysis under different impact energy and different punch diameters.The results show that the impact energy is an important factor affecting the low-speed impact dynamic response and failure of the carbon fiber equipment cabin floor,while the punch diameter has little effect on it.