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《Journal of Vibration and Shock》 2015-04
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Tests for indentation and perforation of sandwich panels with aluminium foam core

LI Zhi-bin;LU Fang-yun;College of Science,National University of Defense Technology;  
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.
【Fund】: 国家自然科学基金(90916026 11132012)
【CateGory Index】: TB383.4
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