Admedes Schuessler GmbH
Fluid-structure interaction transient simulation of aortic valve taking into account stent crimping and release against the aortic wall
The interaction of blood, stent and aorta are critically importance in determining accurate stress cycles in Nitinol self-expanding stent implants. These factors could improve stent lifetime.
Admedes Schuessler and CADFEM (Suisse) developed a modeling procedure with a set of important steps:
- Stent crimping
- Stent release against the aortic wall
- Fluid-structure two-way coupled transient simulation using mesh morphing and remeshing
The team considered a number of factors, including frictional contacts between stent and wall, shape memory alloy, pericardium valve orthotropic properties and non-newtonian blood.
Simulation provided unprecedented information levels — not available with experimental measurements. These revealed the evolution of forces and stresses during a heart pulse and the effects on working conditions, integrity and lifetime of the stent.
- ANSYS Fluent
- ANSYS Mechanical