Modeling and Finite element simulation
Dipartimento di Meccanica Strutturale, Universita' di Pavia, Via Ferrata 1, Pavia 27100, Italy
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
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