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A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
Published on: May 18, 2015
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Hyperelastic material models for simulating deformation of silicone ring pessaries
Kyra M Wanuch1, Alexandra Blokker2, Hamed Kalami2
1Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Ave W, Waterloo, ON, N2L 3G1, Canada.
Journal of the Mechanical Behavior of Biomedical Materials
|August 21, 2024
Summary
This study developed hyperelastic material models for silicone pessaries, enabling accurate finite element analysis of their mechanical behavior. This advances the biomechanical understanding of pelvic floor disorder devices.
Area of Science:
- Biomedical Engineering
- Materials Science
- Gynecological Devices
Background:
- Pessaries are crucial for managing pelvic floor disorders but their mechanical behavior is understudied.
- Custom pessary manufacturing is costly and time-intensive, limiting design optimization.
- Finite element (FE) modeling offers a cost-effective alternative for analyzing pessary mechanics, yet requires accurate material data.
Purpose of the Study:
- To identify hyperelastic material models for silicone used in ring with support (RWS) pessary manufacturing.
- To validate these models through FE analysis of RWS pessaries under various conditions.
- To enable improved biomechanical analysis and design of silicone pessaries.
Main Methods:
- Performed uniaxial tension and compression tests on two silicone materials (Shore 60A and 40A).
- Fitted experimental data to Mooney-Rivlin (MR) hyperelastic material models.
- Validated MR models by comparing FEBio simulations of RWS pessary folding and 3-point bending tests against experimental results.
Main Results:
- Successfully identified hyperelastic material models for the tested silicone materials.
- FE models demonstrated good agreement with experimental force-displacement data for folding and bending simulations.
- Model accuracy was consistent across different RWS pessary sizes and silicone stiffnesses.
Conclusions:
- Hyperelastic material models effectively capture the mechanical response of silicone pessaries.
- FE analysis using these models provides reliable biomechanical insights into RWS pessary designs.
- This research facilitates future advancements in the computational analysis and optimization of pessary devices.
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