Thermal Post-Impact Behavior of Closed-Cell Cellular Structures with Fillers – Part I |
| Journal |
Materials Science Forum (Volume 553) |
| Volume |
Diffusion in Solids and Liquids II |
| Edited by |
Andreas Öchsner and José Grácio |
| Pages |
196-201 |
| DOI |
10.4028/www.scientific.net/MSF.553.196 |
| Online since |
August, 2007 |
| Authors |
Matej Vesenjak, Andreas Öchsner, Zoran Ren |
| Keywords |
Cellular Structure, Closed Cells, Computational Simulation, Fluid-Structure Interaction, Gaseous Pore Filler, Impact Loading |
| Abstract |
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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