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National Academy of Sciences, Proceedings of the National Academy of Sciences, 31(112), p. 9573-9578, 2015

DOI: 10.1073/pnas.1504258112

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Stress controls the mechanics of collagen networks

Journal article published in 2015 by Albert James Licup, Stefan Münster, Abhinav Sharma, Michael Sheinman, Louise M. Jawerth, Ben Fabry ORCID, David A. Weitz, Fred C. MacKintosh
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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.