Modeling and Finite element simulation

Ferdinando Auricchio 

Dipartimento di Meccanica Strutturale, Universita' di Pavia, Via Ferrata 1, Pavia 27100, Italy

Abstract

An always increasing knowledge on material properties as well as a progressively more sophisticated production technology make Shape Memory Alloys (SMA)

extremely interesting for the industrial world.At the same time, SMA devices are typically characterized by complex multi-axial stress states as well as non-homogeneous and non-isothermal conditions both in space and time.

This aspect suggests the finite element method as a useful tool to help and improve application design and realization. With this aim, we focus on three-dimensional macroscopic thermo-mechanicalmodeling able to reproduce the most significant SMA features, such as pseudo elasticity and shape memory effect. Moreover, for the proposed models it is possible the development of a

time-discrete solution algorithm, which is effective and robust.

We verify the computational tool ability to simulate complex pointwise stress-strain histories as well as realistic thermo-mechanical boundary value problems.

As an example we may consider coronaric stents, which are small metal tubes, inserted into an artery at the site of a narrowing to act as an internal scaffolding or support to the blood vessel. Other simulations and details can be found on the web page

http://www.unipv.it/dms/auricchio/cofin\02/home.htm

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Related papers
  1. A phenomenological 1D model describing main and secondary effects of stress-induced solid phase transformations.

Presentation: invited oral at E-MRS Fall Meeting 2005, Symposium C, by Ferdinando Auricchio
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-07-04 07:55
Revised:   2009-06-07 00:44
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