RESUMEN

A matched asymptotic analysis is used to exhibit the connection between supplemental balance equations arising in sharp-interface and phase-field theories for transformations between two rigid phases distinguished only by their constant free-energy densities. The analysis exposes the relationship between the forces and balances arising in the two theories

RESUMEN

We prove the existence of solutions global in time to an initial-boundary value problem for a system of partial differential equations, which consists of the equations of linear elasticity and a nonlinear nonuniformly parabolic equation of second order. The problem models the behavior in time of materials with martensitic phase transformations. This model with diffusive phase interfaces was derived from a model with sharp interfaces, whose evolution is driven by configurational forces, and can be considered to be a regularization of that model. Our existence proof, which contributes to the verification of the model, is only valid in one space dimension.