Aimed at the requirement of safety design of
aluminum alloy components in automobiles and employing a key experiment and
the simulation technique of finite element,the axial anti-collapse behavior of thin-walled square
aluminum alloy tube 6063 was investigated.The pattern of mechanical behavior of this thin-walled
specimen under static and impact load was obtained by means of the experiments on axial static compression and drop-hammer impact.Meantime,simulation analysis of the specimen with different configurational dimensions and under different impact speeds was performed by using finite element model so that,the prediction of its deformation and load was given.It was shown by the investigation that such specimen possesses good energy absorbability;there is a close relationship of anti-collapse ability to the microstructure of material,loading speed,and structural dimension.Lowering of the impact speed and slenderness ratio as well as increasing the wall thickness would be beneficial to improvement of buckling stability.As a damping mechanism for energy absorption in automobiles,the slenderness ratio of its thin-walled tube is to be less than 12,the wall thickness—2 mm,and length—about 310 mm for an optimal construction.