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Updated: Jul 30, 2025
11:01
Ferromagnetic Bare Metal Stent for Endothelial Cell Capture and Retention
Published on: September 18, 2015
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Elemental and experimental analysis of modified stent's structure under uniaxial compression load
Patrick Munyensanga1, Khalil El Mabrouk1
1Euromed Research Center, Euromed Polytechnic School, Euromed University of Fes, Eco-Campus, Meknes Road, 30 030, Fes, Morocco.
Summary
Additive manufacturing enables self-expanding stents with tunable energy absorption. Increasing unit cells in the X-direction significantly boosts specific energy absorption (SEA) for cushioning applications.
Area of Science:
- Materials Science
- Mechanical Engineering
- Additive Manufacturing
Background:
- Additive manufacturing facilitates the creation of complex metamaterials with enhanced energy absorption and impact resistance.
- 3D auxetic materials, like stents, exhibit self-expanding behavior and tunable mechanical properties.
Purpose of the Study:
- To investigate the energy absorption capabilities of a designed stent structure.
- To analyze the impact of varying unit cell numbers in X and Y directions on energy absorption.
Main Methods:
- Experimental testing of 3D printed specimens.
- Numerical simulations and theoretical analysis.
- Fabrication using Fused Deposition Modeling (FDM) techniques.
Main Results:
- Designed self-expanding stents demonstrated tunable yield stress (1.5-2.0 MPa) and effective elastic moduli.
- Maximum energy absorption ranged from 7.1J to 18J.
- Increasing unit cells in the X-direction significantly enhanced specific energy absorption (SEA), while the Y-direction had no significant effect.
Conclusions:
- Self-expanding stents can be designed with innovative energy absorption capabilities.
- These structures are suitable for cushioning applications and can be tailored for specific requirements.
- Unit cell tessellation is a key parameter for optimizing energy absorption in these metamaterials.
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