The driving conditions of all-terrain vehicles are harsh and the maneuverability requirements are high,so they put forward higher requirements for fatigue reliability and light weight.In this paper,a body lightweighting method of carbon fiber-metal-carbon fiber composite laminates is proposed.Through the tensile test of the composite laminates,the constitutive model of the composite laminates is obtained and verified.On this basis,combined with the boundary constraints of the high-strength steel body of all-terrain vehicles,the composite laminate structure model is established,and the global response surface method is used to optimize the parameters of the composite laminates.The optimized composite laminate is applied to the body of the all-terrain vehicle for lightweighting,and the modal analysis,stiffness analysis,strength analysis and dynamic simulation analysis are carried out under the same boundary conditions.Finally,the local composite laminate replacement method is used to carry out the simulation analysis and test verification of the typical working conditions of the impact pavement.The results show that while ensuring the static and dynamic stiffness and strength,the weight of the composite laminate lightweight body is reduced by 283.3kg,and the weight reduction rate is 34.9％.
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