Research On Performance Of Composite Anti-collision Beam Of Passenger Car

Today,the rapid development of non-renewable energy sources such as oil and the rapid development of intelligent network car based on electric vehicles.The lightweight of automobiles has become the focus of research by major car companies.Carbon fiber composites are increasingly used in the automotive field due to their excellent mechanical properties such as high tensile strength and elastic modulus.As the number of domestic car ownership increases year by year,in addition to the frequent occurrence of traffic accidents,automobile anti-collision beam is an important safety barrier when the car collides at high speed,combined with the potential of composite materials in automobiles,the research on composite anti-collision beams is of great significance.The collision simulation of composite impact beams with different thickness is analyzed in this paper.Determining the thickness of the composite anti-collision beam that can replace the metal anti-collision beam,analyze the degree of lightness;Secondly,improved laminate design for composite impact beams and analysis of crash performance under frontal crash conditions,determine the optimal layering scheme.Furthermore,the collision performance of the composite impact beam and the metal impact beam of the optimal layup scheme under the bias condition is verified.The main research contents of this paper are:First of all,establish a finite element model of the automobile anti-collision beam according to the C-NCAP regulations.Preliminary design of composite layup scheme.Analysis high-speed crash simulation of composite beams with different thicknesses,Analysis of collision performance of metal anti-collision beam and composite anti-collision beams with different thicknesses from energy absorption and deformation.Study the energy absorption and deformation of the composite anti-collision beam equivalent to the metal anti-collision beam and analyze the degree of lightness.Secondly,according to the design criteria of composite laminates,four composite layup schemes are designed to simulate high-speed frontal collision,and the collision performance in terms of energy absorption and deformation is compared,and a better design scheme is obtained.Finally,40% offset collision simulation of the optimally laminated compositeanti-collision beam and metal anti-collision beam,comparing its collision performance in terms of energy absorption and deformation,comprehensive comparison and analysis of the feasibility of composite anti-collision beam to replace metal anti-collision beam under two conditions of frontal collision and offset collision.Research shows,composite anti-collision beams of suitable thickness and layup angle can be used to replace metal anti-collision beams to achieve lightweight,and composite anti-collision beams have better crash performance.