ANALYSIS OF DYNAMIC RESPONSE OF STAINLESS-STEEL SQUARE TUBES UNDER LATERAL IMPACT
This paper investigates the dynamic response of stainless-steel square tubes under lateral impact.A nu-merical model of simply supported stainless steel square tubes is established and validated against existing impact testing results to ascertain the accuracy of the finite element model.The influence of wall thickness,section dimen-sions,impact momentum,and impact kinetic energy on the dynamic response of stainless-steel square tubes is inves-tigated in terms of energy absorption and stress variation in the tube during the impact process.The results indicate that the dissipation of impact kinetic energy primarily occurs within the tube deformation.With the increase of steel pipe wall thickness and cross-sectional size,the mid span displacement significantly decreases,the steel pipe wall thickness increases,and the impact duration significantly increases.The impact resistance mechanical performance of stainless-steel square steel pipes is enhanced.The change in impact momentum has a relatively small impact on mid span displacement,with an increase of 2 916.54 kg·m/s in impact momentum and a slight decrease in mid span displacement.The duration of impact force increases by 0.076 seconds.The impact kinetic energy increased by 2 187.42 J,and the mid span displacement increased by 41.9%.The research may provide the reference for the de-sign of engineering structures and the improvement of impact resistance performance.