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On the finite opening of intersonic shear cracks
- Source :
-
International Journal of Solids & Structures . May2004, Vol. 41 Issue 9/10, p2293. 14p. - Publication Year :
- 2004
-
Abstract
- Recent molecular dynamics simulations of dynamic crack propagation have shown that there is a finite crack opening for a shear crack propagating at a sub-Rayleigh speed, but the crack opening becomes significantly smaller once the crack tip velocity exceeds the shear wave speed. To understand this difference between the crack opening for sub-Rayleigh and intersonic shear cracks, we develop in this paper a finite deformation continuum theory incorporating the linear harmonic potential to describe the deformation of a crack in a solid with triangular lattice structure. Using the asymptotic method developed by Knowles [Eng. Fract. Mech. 15 (1981) 469], we show that even after the geometric nonlinearity of finite deformation is accounted for, the intersonic shear cracks have a vanishing crack opening displacement. [Copyright &y& Elsevier]
- Subjects :
- *SHEAR (Mechanics)
*LATTICE dynamics
*STRAINS & stresses (Mechanics)
*SOLIDS
Subjects
Details
- Language :
- English
- ISSN :
- 00207683
- Volume :
- 41
- Issue :
- 9/10
- Database :
- Academic Search Index
- Journal :
- International Journal of Solids & Structures
- Publication Type :
- Academic Journal
- Accession number :
- 12573232
- Full Text :
- https://doi.org/10.1016/j.ijsolstr.2003.12.014