Dinâmica não linear de um sistema não-suave com suporte de memória de forma.

Abstract

Non-smooth dynamical systems are common in engineering systems being associated with impacts and discontinuities, presenting complex responses. The use of smart materials allows attenuating undesirable vibration amplitudes by exploiting characteristics such as hysteretic dissipation. This work presents an investigation of the nonlinear dynamics of an impact system involving shape memory alloys. It is considered a one degree of freedom system subjected to unilateral impact on a discontinuous support with a shape memory alloy element. The thermomechanical behavior of shape memory alloys is described by a constitutive model with assumed transformation kinetics. Numerical simulations are performed comparing the response of an elastic support with the shape memory support. Results show significant changes in responses due to phase transformations.