Thermal post-impact behaviour of closed-cell cellular structures with fillers

Matej Vesenjak (Avtor), Andreas Öchsner (Avtor), Zoran Ren (Avtor)

Povzetek

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 thermal- structural 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.

Ključne besede

mehanika;celične strukture;zaprte celice;plinsko polnilo;udarne obremenitve;interakcija fluid-konstrukcija;dinamične obremenitve;LS-DYNA;ANSYS CFX 10.0;računalniške simulacije;mechanics;cellular structures;closed cells;gas fillers;impact loading;fluid-structure interaction;dynamic loads;computational simulations;

Podatki

Jezik:	Angleški jezik
Leto izida:	2007
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FS - Fakulteta za strojništvo
UDK:	620.178.7:[531/533:519.61/.64]
COBISS:	11159318
ISSN:	0255-5476
Št. ogledov:	1268
Št. prenosov:	28
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarne ključne besede:	mehanika;celične strukture;zaprte celice;plinsko polnilo;udarne obremenitve;interakcija fluid-konstrukcija;dinamične obremenitve;LS-DYNA;ANSYS CFX 10.0;računalniške simulacije;
URN:	URN:SI:UM:
Strani:	str. 196-201
Letnik:	ǂVol. ǂ553
Čas izdaje:	2007
ID:	8717018