Superlinear free-discontinuity models: relaxation and phase-field approximation
Abstract
Abstract In this paper we develop the Direct Method in the Calculus of Variations for free-discontinuity energies whose bulk and surface densities exhibit superlinear growth for large gradients and small jump amplitudes, respectively. A distinctive feature of this kind of models is that the functionals are defined on SBV functions whose jump sets may have infinite measure. Establishing general lower semicontinuity and relaxation results in this setting requires new analytical techniques. In addition, we propose a variational approximation of certain superlinear energies via phase-field models.
Fields of Study & Subjects
Solidification and crystal growth phenomena
Advanced Mathematical Modeling in Engineering
Differential Equations and Numerical Methods
Publication details
- Journal / source
- Calculus of Variations and Partial Differential Equations
- Volume
- 65
- Issue
- 8
- Publication date
- 18 July 2026
- Language
- EN