Unilateral constraints in fracture and contact problems
Book
·
OSTI ID:5517094
In this work, the effect of unilateral constraints is examined by considering several fundamental fracture and contact problems. The first crack problem considered consists of an interface crack in a combined tension or compression and shear field. Unrealistic oscillatory singularities and ensuing material interpenetration from previous analyses are eliminated in this problem by allowing frictionless contact zones at the crack tips. Both tensile and compressive normal loads are considered and numerical results for the contact zone extents, interface crack opening profiles, and stress-intensity factors are presented. For the second crack problem, a periodic array of interface cracks is considered as a simple model for interface crack interaction. Crack opening profiles and stress-intensity factors are presented for various combinations of shear and tension-compression loads. The first contact problem considered consists of an elastic layer resting on an elastic substrate with identical material properties. A uniform pressure and concentrated tensile force are applied to the layer.
- OSTI ID:
- 5517094
- Country of Publication:
- United States
- Language:
- English
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