A two-dimensional shape memory alloy/elastomer actuator

This paper presents a theoretical model for the response of a two-dimension al, thermally driven. shape memory alloy (SMA)/elastomer actuator. The actu ator is assumed to be constructed from a thin layer of SMA bonded to a laye r of elastomer. The proposed device is considered to undergo small displace ments and small strains. The governing equations are developed utilizing th e classical laminated plate theory, energy balance equations, and a two-dim ensional transition model of the SMA layer. A finite element model is devel oped to solve the nonlinear system of equations. Parametric studies are con ducted to demonstrate the effects of the elastomer thickness, thermal condu ctivity, input energy, and heat sink strength on the overall time response of the SMA/elastomer actuator. (C) 2001 Elsevier Science Ltd. All rights re served.