PRINCIPLES OF LOCALIZATION IN THE FRACTURE OF QUASI-BRITTLE STRUCTURES

摘要

Comparisons between elastic and dissipative truss-like models for systems with bilinear constitutive characteristics reveal useful analogies for computation. In particular, where localization and unloading are concerned, interpretation of a dissipative system in elastic terms generates a, global potential function embracing many possible equilibrium states. We invoke the Maxwell stability criterion, based on global rather than local minima of energy, to determine the most likely outcome. Models in one and two dimensions are developed to explore in detail the analytical implications. [References: 16]