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dc.contributor.authorVahabi, M.
Vos, Bart E.
de Cagny, Henri C.G.
Bonn, Daniel
Koenderink, Gijsje H.
MacKintosh, F.C.
dc.date.accessioned 2018-08-17T13:36:22Z
dc.date.available 2018-08-17T13:36:22Z
dc.date.issued 2018
dc.identifier.citation Vahabi, M., Vos, Bart E., de Cagny, Henri C.G., et al.. "Normal stresses in semiflexible polymer hydrogels." Physical Review E, 97, no. 3 (2018) American Physical Society: https://doi.org/10.1103/PhysRevE.97.032418.
dc.identifier.urihttps://hdl.handle.net/1911/102463
dc.description.abstract Biopolymer gels such as fibrin and collagen networks are known to develop tensile axial stress when subject to torsion. This negative normal stress is opposite to the classical Poynting effect observed for most elastic solids including synthetic polymer gels, where torsion provokes a positive normal stress. As shown recently, this anomalous behavior in fibrin gels depends on the open, porous network structure of biopolymer gels, which facilitates interstitial fluid flow during shear and can be described by a phenomenological two-fluid model with viscous coupling between network and solvent. Here we extend this model and develop a microscopic model for the individual diagonal components of the stress tensor that determine the axial response of semiflexible polymer hydrogels. This microscopic model predicts that the magnitude of these stress components depends inversely on the characteristic strain for the onset of nonlinear shear stress, which we confirm experimentally by shear rheometry on fibrin gels. Moreover, our model predicts a transient behavior of the normal stress, which is in excellent agreement with the full time-dependent normal stress we measure.
dc.language.iso eng
dc.publisher American Physical Society
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.title Normal stresses in semiflexible polymer hydrogels
dc.type Journal article
dc.citation.journalTitle Physical Review E
dc.citation.volumeNumber 97
dc.citation.issueNumber 3
dc.identifier.digital PhysRevE.97.032418
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1103/PhysRevE.97.032418
dc.identifier.pmid 29776166
dc.type.publication publisher version
dc.citation.articleNumber 032418


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