Experimental Investigation of an Energy Absorbing Composite Sandwich Web
Composite materials can be designed to absorb significant energy through crushing type failures, and such energy absorbing elements form integral parts of the fuselage subfloor structure of some modern helicopters. As part of a wider project to develop novel designs for crashworthy helicopter structures, this paper details experimental investigations into the energy absorption of axially compressed constrained sandwich specimens. The sandwich specimens consisted of two carbon epoxy facings bonded to a Nomex honeycomb core. To prevent the specimens failing in a brittle global buckling mode and promote continuous crushing, an embedded ply-drop triggering mechanism was incorporated into each of the carbon facings. A metallic test fixture was used to laterally constrain the specimens. It was found that the steady state crushing load was proportional to the thickness of the sandwich faces. With further refinement this type of structure could be integrated into the subfloor of an aerospace platform.
energy absorption crushing composite sandwich structures experimental testing
M.W. Joosten S. Dutton D. Kelly R. Thomson
School of Mechanical and Manufacturing Engineering,University of New South Wales, Sydney, NSW 2052, Cooperative Research Centre for Advanced Composite Structures Limited,506 Lorimer Street, Fishermans
国际会议
2011年亚太航空航天技术学术会议(APISAT 2011)
澳大利亚
英文
1-11
2011-02-28（万方平台首次上网日期，不代表论文的发表时间）