Z. C. Lin, Abbott Vascular Inc., Santa Clara, CA; D. Mackiewicz, B. Anukhin, H. M. Hsiao, K. Pike, Guidant Corporation, Santa Clara, CA
Nitinol and Radiopaque Nitinol hypotube usually contains greater than 30% cold work in order to optimize its performance in superelasticity. The microstructure of the cold-worked hypotube is texture-like, and therefore, the mechanical properties of the hypotube should be anisotropic.
In this study, for each material, two groups of dog-bone specimens will be prepared from hypotube: one has the spine along the longitudinal direction and the other has the spine 45 degree from the longitudinal direction. The specimens will be tested for tension properties. The discussion will be focused on if there are anisotropic properties and how the anisotropy of hypotube impacts the results of finite element analysis.
For both nitinol and radiopaque nitinol, two groups of dog-bone specimens will be prepared from hypotube: one has the spine along the longitudinal direction and the other has the spine 45 degree from the longitudinal direction. The specimens will be tested for tension properties. The discussion will be focused on if there are anisotropic properties and how the anisotropy of hypotube impacts the results of finite element analysis.
