1E. Artioli, 2S. Reese
1University of Rome Tor Vergata/IT, 2RWTH Aachen University/DE
The shape memory effect is seen in metallic as well as polymeric materials. A typical representative of the first class is NiTi (also called Nitinol) which exhibits different phase transformations. The effect of pseudoelasticity where the material undergoes a reversible stress-induced transformation from an austenitic to a martensitic crystallographic configuration is often exploited in stents implanted into narrow blood vessels as found in the intracraniel domain. Typical for NiTi are also the temperature-induced one-way and two-way effects which are utilized in the context of stents but also other applications such as actuatoric devices. The shape memory effect in polymers is controlled by the glass transition typical for polymers. Decreasing the temperature in polymers reduces chain mobility and finally results into a so-called glassy state. Re-increasing the temperature enables the polymeric structure to recover its original state. This effect is also exploited in medical technology, e.g. for stent implantation.
The minisymposium aims at highlighting the shape memory behaviour and also the pseudo-elasticity effect in different contexts. Welcome are physically-based and phenomenological models as well as special numerical methods to robustly simulate the complex behaviour of these peculiar materials. We are also looking forward to simulations of practically relevant simulations validated by experimental data.