Thermomechanical couplings in shape memory alloy materials

In this work we address several theoretical and computational issues which are related to the thermomechanical modeling of shape memory alloy materials. More specifically, in this paper we revisit a non-isothermal version of the theory of large deformation generalized plasticity which is suitable for describing the multiple and complex mechanisms occurring in these materials during phase transformations. We also discuss the computational implementation of a generalized plasticity based constitutive model and we demonstrate the ability of the theory in simulating the basic patterns of the experimentally observed behavior by a set of representative numerical examples

PSRI schemes for shells: a benchmark study

The aim of this paper is to experimentally study the accuracy of the partial selective reduced integration (PSRI) scheme, for the numerical solution of the classical 2D Naghdi\u27s shell model. In this work we consider a bending dominated shell as a benchmark problem and we analyze the convergence properties of the PSRI finite elements as well as their behaviour in presence of the locking phenomenon. Moreover we study the computed solutions in order to evaluate their dependence on different types of mesh, in particular if boundary layers appear