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Updated: Aug 7, 2026
11:28
A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
Published on: May 18, 2015
Reduced parameter formulation for incorporating fiber level viscoelasticity into tissue level biomechanical models
1Department of Mechanical Engineering, University of South Carolina, 300 South Main, Columbia, SC 29208, USA. bischoff@engr.sc.edu
Annals of Biomedical Engineering
|June 15, 2006
Summary
This study incorporates collagen's time-dependent viscoelastic properties into soft tissue models. The new fiber-based hyperelastic model accurately predicts complex tissue behaviors like anisotropy and preconditioning.
Area of Science:
- Biomedical Engineering
- Materials Science
- Soft Tissue Mechanics
Background:
- Collagen is a viscoelastic material crucial for soft tissue behavior.
- Existing soft tissue models often neglect collagen's time-dependent properties, limiting their accuracy.
Purpose of the Study:
- To develop a fiber-based hyperelastic model that directly incorporates collagen's viscoelasticity.
- To enhance the prediction of soft tissue mechanical responses.
Main Methods:
- Utilized the one-dimensional theory of quasi-linear viscoelasticity.
- Integrated time-dependent collagen properties into a locally defined, anisotropic extracellular matrix model.
- Employed numerical and computational analysis.
Main Results:
- The developed model successfully predicts key soft tissue behaviors: anisotropy, strain hardening, preconditioning, and rate-independent hysteresis.
- The model incorporates seven material parameters.
- A formulation for fiber-level viscoelasticity in structural models was introduced.
Conclusions:
- Directly modeling collagen's viscoelasticity significantly improves the accuracy of soft tissue mechanical response predictions.
- The new model provides a more comprehensive understanding of extracellular matrix behavior.
- This approach offers a foundation for advanced structural modeling of biological tissues.
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