Displacement field for an edge dislocation in a layered half-space
| Autor: | J. C. Savage |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Atmospheric Science
Materials science Soil Science Geometry Aquatic Science Oceanography symbols.namesake Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Perpendicular Earth-Surface Processes Water Science and Technology Dislocation creep Ecology Paleontology Forestry Half-space Poisson's ratio Geophysics Classical mechanics Space and Planetary Science Peierls stress Displacement field symbols Dislocation Burgers vector |
| Zdroj: | Journal of Geophysical Research: Solid Earth. 103:2439-2446 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/97jb02562 |
| Popis: | The displacement field for an edge dislocation in an Earth model consisting of a layer welded to a half-space of different material is found in the form of a Fourier integral following the method given by Weeks et al. [1968]. There are four elementary solutions to be considered: the dislocation is either in the half-space or the layer and the Burgers vector is either parallel or perpendicular to the layer. A general two-dimensional solution for a dip-slip faulting or dike injection (arbitrary dip) can be constructed from a superposition of these elementary solutions. Surface deformations have been calculated for an edge dislocation located at the interface with Burgers vector inclined 0°, 30°, 60°, and 90° to the interface for the case where the rigidity of the layer is half of that of the half-space and the Poisson ratios are the same. Those displacement fields have been compared to the displacement fields generated by similarly situated edge dislocations in a uniform half-space. The surface displacement field produced by the edge dislocation in the layered half-space is very similar to that produced by an edge dislocation at a different depth in a uniform half-space. In general, a low-modulus (high-modulus) layer causes the half-space equivalent dislocation to appear shallower (deeper) than the actual dislocation in the layered half-space. |
| Databáze: | OpenAIRE |
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