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Viscoelasticity of Tendons Under Transverse Compression
Journal of Biomechanical Engineering
|August 7, 2016
Summary
This study reveals anomalous creep and recovery in bovine tendons under transverse compression. Tendon behavior suggests stress-driven dehydration and pressure-sensitive adhesion, impacting 3D deformation models.
Area of Science:
- Biomechanics
- Materials Science
- Biomedical Engineering
Background:
- Tendons exhibit complex anisotropic and viscoelastic properties.
- Understanding tendon viscoelasticity under off-axis loading is crucial for modeling 3D deformation.
Purpose of the Study:
- To investigate the creep and recovery behavior of bovine digital extensor tendons under transverse compressive stress.
- To analyze the viscoelastic response and its implications for tendon modeling.
Main Methods:
- Bovine digital extensor tendons were subjected to transverse compression tests between glass plates.
- Creep and recovery phases were analyzed under increasing stress loads (up to ~100 kPa).
- Power law dependence on time and stress was evaluated for creep deformation.
Main Results:
- Anomalous creep response observed: relative creep rate decreased with increasing stress.
- Creep deformation followed a power law, with the exponent decreasing from ~0.18 to ~0.058.
- Anomalous recovery was noted, with relative residual strain decreasing with increasing creep stress.
Conclusions:
- Stress-driven dehydration may explain the anomalous creep behavior.
- Tendons acted as pressure-sensitive adhesives due to low transverse shear modulus.
- Creep and recovery are consistent with the Boltzmann superposition principle when accounting for adhesion.
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