[Optimization based on finite element technique of nitinol stent]

Area of Science:

• Biomedical Engineering
• Materials Science
• Mechanical Engineering

Background:

• Nitinol stents are crucial in cardiovascular interventions.
• Understanding their mechanical performance and fatigue is vital for patient safety and device longevity.
• Optimizing stent design requires detailed analysis of structural parameters.

Purpose of the Study:

• To simulate and evaluate the mechanical performance and fatigue safety of three distinct Nitinol stent structures.
• To investigate the impact of varying stent edge width (omega) and strut angle (theta) on performance.
• To provide a reference for the optimal design of Nitinol stents.

Main Methods:

• Finite element method (FEM) was employed for simulation.
• Geometry and finite element models were established with necessary assumptions and simplifications.
• Material models and boundary conditions were defined for accurate analysis.

Main Results:

• Strain distribution and fatigue life were computed for different stent configurations.
• The study identified how variations in edge width and strut angle influence mechanical behavior.
• Key performance metrics were quantified for each stent design.

Conclusions:

• The finite element analysis provides valuable data for Nitinol stent design.
• Specific geometric parameters significantly affect stent mechanical performance and fatigue life.
• This research supports the development of safer and more effective Nitinol stent devices.