多壁管增强泡沫铝结构动态响应及吸能性能研究

In order to improve the energy absorption performance of the aluminum foam, a multi-wall tube reinforced aluminum foam was proposed. The dynamic crushing characteristics of the aluminum foam, the multi-wall tube, and the multi-wall tube reinforced aluminum foam were studied by Hopkinson pressure rod tests & finite element analysis with software ABAQUS / Explicit. The deformation mode and energy absorption of the aluminum foam was compared with those of the multi-wall tube reinforced aluminum foam, with the strain rate effect on the coupling enhancement discussed. The results show that, the finite element analysis can simulate the test results well. The strain rate effect on the aluminum foam is not obvious, while that on the multi-walled tube and the multi-wall tube reinforced aluminum foam is considerably obvious, and the energy absorption improves with higher strain rates. Under the dynamic impact condition, the peak strength of the multi-walled tube reinforced aluminum foam has obvious coupling enhancement compared with that of the multi-walled tube or the aluminum foam, and the corresponding energy absorption of the former increases by 10.34% over the sum of those of the latter ones. The study on dynamic crushing characteristics of the multi-walled tube reinforced aluminum foam provides a reference for the application of energy-absorbing load-carrying components.