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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
Some theoretical considerations on the dynamic response of sandwich structures under impulsive loading
International Journal of Impact Engineering, Volume 37, No. 6, Year 2010
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Description
A theoretical solution is obtained to predict the dynamic response of peripherally clamped square metallic sandwich panels with either honeycomb core or aluminium foam core under blast loading. In the theoretical analysis, the deformation of sandwich structures is separated into three phases, corresponding to the transfer of impulse to the front face velocity, core crushing and overall structural bending/stretching, respectively. The cellular core is assumed to have a progressive crushing deformation mode in the out-of-plane direction, with a dynamically enhanced plateau stress (for honeycombs). The in-plane strength of the cellular core is assumed unaffected by the out-of-plane compression. By adopting an energy dissipation rate balance approach developed by earlier researchers for monolithic square plates, but incorporating a newly developed yield condition for the sandwich panels in terms of bending moment and membrane force, "upper" and "lower" bounds are obtained for the maximum permanent deflections and response time. Finally, comparative studies are carried out to investigate: (1) influence of the change in the in-plane strength of the core after the out-of-plane compression; (2) performances of a square monolith panel and a square sandwich panel with the same mass per unit area; and (3) analytical models of sandwich beams and circular and square sandwich plates. © 2009 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Zhu, Feng
Australia, Hawthorn
Swinburne University of Technology
Wang, Zhihua
Australia, Hawthorn
Swinburne University of Technology
China, Taiyuan
Taiyuan University of Technology
Lu, Guoxing
Australia, Hawthorn
Swinburne University of Technology
Singapore, Singapore City
School of Mechanical and Aerospace Engineering
Nurick, Gerald N.
South Africa, Cape Town
University of Cape Town
Statistics
Citations: 84
Authors: 4
Affiliations: 4
Identifiers
Doi:
10.1016/j.ijimpeng.2009.11.003
ISSN:
0734743X