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Biaxial Mechanical Characterizations of Atrioventricular Heart Valves
Published on: April 9, 2019
A hyperelastic constitutive law for aortic valve tissue
Karen May-Newman1, Charles Lam, Frank C P Yin
1Department of Mechanical Engineering, San Diego State University, San Diego, CA 92182-1323, USA. kmn@kahuna.sdsu.edu
Journal of Biomechanical Engineering
|July 17, 2009
Summary
Researchers developed a new model to predict aortic valve leaflet behavior. This strain energy function accurately describes the nonlinear, anisotropic material properties for improved computational modeling.
Area of Science:
- Biomedical Engineering
- Materials Science
- Cardiovascular Research
Background:
- Aortic valve leaflets exhibit complex nonlinear and anisotropic material properties.
- Accurate material characterization is crucial for computational modeling of valve function and disease.
Purpose of the Study:
- To develop a strain energy function for aortic valve leaflets.
- To accurately predict the mechanical behavior of aortic valve tissue under biaxial loading.
Main Methods:
- Biaxial testing was performed on porcine aortic valve leaflets.
- Constitutive modeling was applied to fit a strain energy function to experimental data.
Main Results:
- A strain energy function based on two strain invariants accurately described the nonlinear anisotropic behavior.
- The model utilized only three coefficients to predict stress-strain behavior across a wide range of deformations.
Conclusions:
- The developed constitutive law effectively models aortic valve leaflet mechanics.
- This model has significant applications in computational simulations for valve treatments and engineering.
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