2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/21471We use considerations of energy balance and dissipation to derive a self-consistent version of the shear-transformation-zone (STZ) theory of plastic deformation in amorphous solids. The theory is generalized to include arbitrary spatial orientations of STZs. Continuum equations for elasto-plastic material and their energy balance properties are discussed.26 pages, 4 figuresSoft Condensed MatterMaterials Sciencetext