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Updated: Jul 17, 2026
07:07
Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing
Published on: December 13, 2016
A theoretical framework to analyze bend testing of soft tissue.
1Department of Mechanical Engineering, Widener University, Chester, PA, USA. manicosia@widener.edu
Journal of Biomechanical Engineering
|January 18, 2007
Summary
A new theory based on finite elasticity analyzes biomaterial bending properties, crucial for understanding bioprosthetic heart valve fatigue failure. This framework fits experimental data to nonlinear strain energy functions.
Area of Science:
- Biomedical Engineering
- Materials Science
- Biomechanics
Background:
- Bioprosthetic heart valve failure is often linked to repetitive flexural stresses.
- Existing experimental methods for measuring biomaterial bending lack a robust theoretical framework for data analysis.
Purpose of the Study:
- To develop a theoretical framework based on finite elasticity to analyze bending properties of biomaterials.
- To enable fitting experimental bending data to arbitrary strain energy functions.
Main Methods:
- Formulation of a theory based on finite elasticity to analyze large displacement bending.
- Construction of a simple finite element model to validate the proposed theoretical approach.
- Fitting experimental bending moment versus radius of curvature data to nonlinear strain energy functions.
Main Results:
- The developed theory successfully fits experimental bending data to arbitrary strain energy functions.
- A finite element model confirmed the validity of the proposed analytical method.
- Bend testing data for glutaraldehyde-fixed bovine pericardium showed good agreement when fit to a nonlinear strain energy function.
Conclusions:
- The presented finite elasticity theory provides a method to analyze biomaterial bending properties.
- This approach can be integrated into constitutive models for soft tissues, improving understanding of fatigue failure in bioprosthetic devices.
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