Experimental and numerical evaluation of the mechanical behavior of strongly anisotropic light-weight metallic fiber structures under static and dynamic compressive loading

Olaf Andersen (Avtor), Matej Vesenjak (Avtor), Thomas Fiedler (Avtor), Jehring (Avtor), Lovre Krstulović-Opara (Avtor)

Povzetek

Rigid metallic fiber structures made from a variety of different metals and alloys have been investigated mainly with regard to their functional properties such as heat transfer, pressure drop, or filtration characteristics. With the recent advent of aluminum and magnesium-based fiber structures, the application of such structures in light-weight crash absorbers has become conceivable. The present paper therefore elucidates the mechanical behavior of rigid sintered fiber structures under quasi-static and dynamic loading. Special attention is paid to the strongly anisotropic properties observed for different directions of loading in relation to the main fiber orientation. Basically, the structures show an orthotropic behavior; however, a finite thickness of the fiber slabs results in moderate deviations from a purely orthotropic behavior. The morphology of the tested specimens is examined by computed tomography, and experimental results for different directions of loading as well as different relative densities are presented. Numerical calculations were carried out using real structural data derived from the computed tomography data. Depending on the direction of loading, the fiber structures show a distinctively different deformation behavior both experimentally and numerically. Based on these results, the prevalent modes of deformation are discussed and a first comparison with an established polymer foam and an assessment of the applicability of aluminum fiber structures in crash protection devices is attempted.

Ključne besede

materiali;struktura vlaken;ortotropija;sintranje;stiskanje;statične obremenitve;dinamične obremenitve;absorpcija energije;numerične simulacije;aluminum fiber;fiber structure;orthotropy;sintering;compression;static loading;dynamic loading;energy absorption;numerical simulation;

Podatki

Jezik:	Angleški jezik
Leto izida:	2016
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FS - Fakulteta za strojništvo
UDK:	539.216:620.1
COBISS:	19567126
ISSN:	1996-1944
Št. ogledov:	675
Št. prenosov:	415
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	materiali;struktura vlaken;ortotropija;sintranje;stiskanje;statične obremenitve;dinamične obremenitve;absorpcija energije;numerične simulacije;
URN:	URN:SI:UM:
Vrsta dela (COBISS):	Znanstveno delo
Strani:	Str. 1-20
Letnik:	ǂVol. ǂ9
Zvezek:	ǂiss. ǂ5
Čas izdaje:	2016
DOI:	10.3390/ma9050398
ID:	10843817