The energy momentum tensor in the presence of body forces and the Peach-Koehler force on a dislocation

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:45

Article

Lubarda, V. A.^1,2 

[1] Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA

[2] Montenegrin Acad Sci & Arts, Podgorica 81000, Montenegro

关键词: body force;    dislocation;    energy momentum tensor;    geomechanics;    gravity load;    J integral;    Peach-Koehler force;    potential energy;   

DOI  :  10.1016/j.ijsolstr.2007.10.004

来源: Elsevier

【 摘 要 】

A modified energy momentum tensor, in the presence of body forces, is introduced and used to construct the nonconserved J, M, and L integrals, and to derive the energetic forces associated with a defect motion within the material. The J integral is then applied to evaluate the Peach-Koehler force on an inclined edge dislocation within a large block due to its own weight. The equilibrium position of the dislocation is determined for different boundary conditions of interest in geomechanics. (c) 2007 Elsevier Ltd. All rights reserved.

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