MODELING OF THERMOELECTRIC HEAT-TRANSFER IN SHAPE-MEMORY ALLOY ACTUATORS - TRANSIENT AND MULTIPLE CYCLE SOLUTIONS Conference Paper uri icon

abstract

  • In this paper we study the transient and multiple cycle solutions of one-dimensional symmetric thermoelectric shape memory alloy (SMA) actuators. From the model proposed by Bhattacharya et al. [1], an approximately equivalent simpler model governed by an integro-differential equation is derived first, to describe the temperature distribution in SMA. Then a numerical algorithm is proposed to solve the integro-differential equation. It is found that for the transient cooling problem with constant electric current density of magnitude |J| there is a critical value J0 of |J| such that when |J|>J0, the temperature in SMA may not be always decreasing. The heat transfer problem and the resulting phase transition of SMA, induced by a piecewise constant electric current source, are also studied. It is found that there exist restrictions on the maximum and minimum values of the current density J ff a repeated complete phase transition to take place in SMA. Explicit expressions for the critical values of J are derived and their physical implications are discussed. 1995.

published proceedings

  • INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE

author list (cited authors)

  • LAGOUDAS, D. C., & DING, Z. H.

citation count

  • 17

complete list of authors

  • LAGOUDAS, DC||DING, ZH

publication date

  • January 1995