Abstract

Significance We report nonlinear rheology experiments on collagen type I networks, which demonstrate a surprising concentration independence of the network stiffness in the nonlinear elastic regime. We develop a model that can account for this, as well as the classical observations of an approximate exponential stress–strain relationship in collagenous tissues, for which a microscopic model has been lacking. Our model also demonstrates the importance of normal stresses in controlling the nonlinear mechanics of fiber networks.

Keywords

Nonlinear systemRheologyStiffnessIndependence (probability theory)Stress (linguistics)MechanicsExponential functionCollagen fiberStress–strain curveMaterials scienceMathematicsPhysicsMathematical analysisComposite materialAnatomyDeformation (meteorology)

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Publication Info

Year
2015
Type
article
Volume
112
Issue
31
Pages
9573-9578
Citations
372
Access
Closed

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Cite This

Albert James Licup, Stefan Münster, Abhinav Sharma et al. (2015). Stress controls the mechanics of collagen networks. Proceedings of the National Academy of Sciences , 112 (31) , 9573-9578. https://doi.org/10.1073/pnas.1504258112

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DOI
10.1073/pnas.1504258112