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A three‐dimensional model describing stress‐temperature induced solid phase transformations: thermomechanical coupling and hybrid composite applications
Author(s) -
Auricchio Ferdinando,
Petrini Lorenza
Publication year - 2004
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1087
Subject(s) - shape memory alloy , sma* , composite number , materials science , coupling (piping) , finite element method , joule heating , work (physics) , phenomenological model , stress (linguistics) , composite material , mechanical engineering , structural engineering , computer science , engineering , physics , algorithm , linguistics , philosophy , quantum mechanics
Between composite materials, shape memory alloy (SMA) composites are having a more and more relevant role. Typically, SMA wires are embedded in a metallic or a polymeric matrix to obtain materials with native multi‐functionality and adaptive properties. This work approaches the computational study of the mechanical response of a composite in which SMA wires, previously deformed, are activated by electrical current heating, and accordingly try to recover the original shape inducing a shape change or a prestress in the structure. In particular, since the SMA behaviour is strongly affected by the thermo‐mechanical coupling, in the first part of this work we present a 3D phenomenological model able to take into account this aspect. The model time‐discrete counterpart is used to develop a 3D solid finite element able to describe the thermo‐electro‐mechanical coupled problem due to shape memory alloy response and to Joule effect. Finally, in the second part of the paper, we employ the developed computational tool to simulate different feasible SMA composite applications. Copyright © 2004 John Wiley & Sons, Ltd.