梯度泡沫铝增强铝合管轴压力学性能研究OA

To investigate the effects of gradient aluminum foam filling on the axial compression performance and energy dissipation of thin-walled aluminum alloy tubes,a design method for enhancing the axial compres-sion performance of aluminum alloy tubes was proposed.Firstly,axial compression tests were conducted on aluminum foam with five different relative densities,and a theoretical model was established.Then,to analyze the buckling modes and energy dissipation performance of the composite tubes,axial compression tests were performed on aluminum tubes,gradient aluminum foam,and thin-walled aluminum alloy tubes filled with gra-dient aluminum foam.The results show that embedding gradient aluminum foam can significantly enhance the bearing capacity of aluminum tubes,optimize deformation modes,and improve the energy absorption capacity by more than 51%.The wall thickness and height of the aluminum tubes have a significant impact on their structural mechanical performance.Deformation of gradient aluminum foam with different distribution pat-terns initiates from the regions with lower relative density.The distribution pattern of gradient aluminum foam significantly influences the energy dissipation capacity of the composite tubes.