利用MTS和落锤试验机研究了由复合材料面板和闭孔泡沫铝芯层组成的夹芯板结构在压入和侵彻时的变形和失效行为，并通过引入无量纲参数———能量吸收效率因子，探讨了一些关键参数对夹芯板压入和侵彻性能以及能量吸收性能的影响，如冲击能量、面板厚度、芯层厚度及相对密度、压头／锤头形状和边界条件等。结果表明夹芯板的破坏主要集中在压头作用的局部区域内。夹芯板的能量吸收效率对其结构参数比较敏感，增加上层面板厚度、芯层厚度或芯层相对密度能够有效地提高夹芯板结构的能量吸收能力以及抵抗压入和侵彻的能力，而下层面板厚度的对夹心板抗侵彻性能的影响不明显。不同的压头／锤头形状和边界条件对泡沫铝夹芯板的压入和侵彻响应以及能量吸收性能影响明显。%Indentation and perforation behaviors of sandwich panels with composite face sheets and closed-cell aluminium foam core were investigated experimentally.Quasi-static and low-velocity impact tests were conducted by using a MTS system and a drop hammer tester,respectively.Experimental results showed that the deformation and failure of the sandwich panels are roughly confined to the area underneath the indenter and the material outside the contact area seems to be intact.Effects of some key parameters,such as,impact energy,face sheet and core thicknesses,core density, indenter nose shape,and boundary conditions on the overall energy absorption behavior of the panels were studied and compared with an energy-absorbing efficiency factor.It was showed that the energy-absorbing efficiency of the panels is sensitive to its structural parameters;increasing the upper face sheet thickness and the thickness of core or the relative mass density of core can effectively improve the energy-absorbing ability and the ability against indentation and perforation of the panels;the effects of the lower face sheet thickness on the ability against perforation of the panels is not obvious;different shapes of indenter and hammer and boundary conditions have significant effects on the responses of identation and perforation and the energy-absorbing performance of the panels.
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