2020/05/20 by Yves-Patrick Pellegrini, Pellegrini, Yves-Patrick · 1 citation
Engineering · #FOS: Physical sciences #Fatigue and fracture mechanics #Materials Science (cond-mat.mtrl-sci) #Numerical methods in engineering #Rock Mechanics and Modeling #Soft Condensed Matter (cond-mat.soft) #Ultrasonics and Acoustic Wave Propagation
paper · pdf · doi:10.48550/arxiv.2005.12704
openalex publication_date 2020/05/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The elastodynamic Peach-Koehler force is computed for a fully-regularized straight dislocation with isotropic core in continuum isotropic elastic elasticity, in compact forms involving partial mass or impulsion functions relative to shear and compressional waves. The force accounts for both dynamic radiation damping and inertia. The expressions are valid indifferently for subsonic or supersonic velocities. Results are compared with the case of a flat-core dislocation of the Peierls-Eshelby type, for a motion of jump from rest to constant velocity. In the steady-state limit, the Lagrangian function relevant to expressing the force in the flat-core case must be replaced by a related but different function for the regularized dislocation. However, by suitably defining the regularizing dislocation width, the steady-state limits of the force for the fully-regularized and flat-core dislocations can be matched exactly.