Paper Title:

Thermal Post-Impact Behavior of Closed-Cell Cellular Structures with Fillers – Part I

Periodical Materials Science Forum (Volume 553)
Main Theme Diffusion in Solids and Liquids II, DSL-2006 II
Edited by Andreas Öchsner and José Grácio
Pages 196-201
DOI 10.4028/www.scientific.net/MSF.553.196
Citation Matej Vesenjak et al., 2007, Materials Science Forum, 553, 196
Online since August, 2007
Authors Matej Vesenjak, Andreas Öchsner, Zoran Ren
Keywords Cellular Structure, Closed Cells, Computational Simulation, Fluid Structure Interaction (FSI), Gaseous Pore Filler, Impact Loading
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The study describes the behavior of regular closed-cell cellular structure with gaseous fillers under impact conditions and consequent post-impact thermal conduction due to the compression of filler gas. Two dependent but different analyses types have been carried out for this purpose: (i) a strongly coupled fluid-structure interaction and (ii) a weakly coupled thermalstructural analysis. This paper describes the structural analyses of the closed-cell cellular structure under impact loading. The explicit code LS-DYNA was used to computationally determine the behavior of cellular structure under compressive dynamic loading, where one unit volume element of the cellular structure has been discretised with finite elements considering a simultaneous strongly coupled interaction with the gaseous pore filler. Closed-cell cellular structures with different relative densities and initial pore pressures have been considered. Computational simulations have shown that the gaseous filler influences the mechanical behavior of cellular structure regarding the loading type, relative density and type of the base material. It was determined that the filler’s temperature significantly increases due to the compressive impact loading, which might influence the macroscopic behavior of the cellular structure.

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