Finite element analysis for the design of Nitinol medical devices

Abstract

Medical technology continues to advance rapidly, as physicians and engineers move closer and understand better each other's needs. Nowhere is there more evidence for this than in the development of advanced medical implants. Traditionally, new products were developed by prototyping and evaluation; however, this process is very time-consuming and often does not fully reveal any potential failures. Finite element modelling and analysis can greatly reduce testing and time to market, by allowing the designer to computer-test his product in advance of any prototypes. Algorithms have been developed which allow for the accurate predictive finite element analysis of nickel-titanium alloys that have extremely complex, but highly attractive mechanical behaviour for medical applications.

Key Words:

• finite element analysis (FEA)
• Nitinol
• non-linearities
• stent