Work

The revised elastic field of an edge dislocation

Year: 2025

Type: article

Abstract: We modify the traditional linear-elastic field of an edge dislocation. The modifications stem from symmetry and energy requirements imposed in terms of embedded (deformed) coordinates. These requirements are satisfied if a line force is added to the dislocation field. The modification to the stress field is expressed by coefficients that are a function only of Poisson's ratio. Qualitatively, the field of the dislocation is increased in the glide direction and decreased in the climb direction. There are small changes to the field of a screw dislocation that do not entail the addition of a line force. Effects of nonlinearity, anisotropic elasticity, and image forces are briefly considered.

Source: Proceedings of the National Academy of Sciences

DOI: 10.1073/pnas.2420808122

Authors: J. P. Hirth, P. M. Anderson

Institution: The Ohio State University

Language: English

Topic: Elasticity and Wave Propagation

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Funders: U.S. Department of Energy, Office of Science, Basic Energy Sciences

Awards: G2692140857, NEW: MECHANISMS AND MODELING OF HIGH OUTPUT SHAPE MEMORY ALLOYS; PI-MICHAEL MILLS, NEW: MECHANISMS AND MODELING OF HIGH OUTPUT SHAPE MEMORY ALLOYS; PI-MICHAEL MILLS