2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/137103This note addresses a three-dimensional model for isothermal stress-induced transformation in shape-memory polycrystalline materials. We treat the problem within the framework of the energetic formulation of rate-independent processes and investigate existence and continuous dependence issues at both the constitutive relation and quasi-static evolution level. Moreover, we focus on time and space approximation as well as on regularization and parameter asymptotics.33 pages, 3 figuresAnalysis of PDEs74C05; 49J40text