Crack tip shielding or anti-shielding due to smooth and discontinuous material inhomogeneities

N.K. Simha (Avtor), Franz Dieter Fischer (Avtor), Otmar Kolednik (Avtor), Jožef Predan (Avtor), G.X. Shan (Avtor)

Povzetek

This paper describes a theoretical model and related computational methods forexamining the influence of inhomogeneous material properties on the crack driving force in elastic and elastic-plastic materials. Following the configurational forces approach, the crack tip shielding or anti-shielding dueto smooth (e.g. graded layer) and discontinuous (e.g. bimaterial interface)distributions in material properties are derived. Computational post-processing methods are described to evaluate these inhomogeneity effects.The utility of the theoretical model and computational methods is demonstrated by examining a bimaterial interface perpendicular to a crack in elastic and elastic-plastic compact tension specimens.

Ključne besede

lomna mehanika;lomna žilavost;kompoziti;slojeviti materiali;nehomogenost;razpoke;metoda končnih elementov;elastični bimateriali;fracture mechanics;fracture toughness;composite materials;layered material;inhomogeneity;cracks;finite element method;elastic bimaterials;

Podatki

Jezik:	Angleški jezik
Leto izida:	2005
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FS - Fakulteta za strojništvo
UDK:	539.3:519.61/.64
COBISS:	10400022
ISSN:	0376-9429
Št. ogledov:	1736
Št. prenosov:	78
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarne ključne besede:	lomna mehanika;lomna žilavost;kompoziti;slojeviti materiali;nehomogenost;razpoke;metoda končnih elementov;elastični bimateriali;
URN:	URN:SI:UM:
Strani:	str. 73-93
Letnik:	ǂVol. ǂ135
Zvezek:	ǂiss. ǂ1/4
Čas izdaje:	2005
ID:	8718382