Journal
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
Volume 42, Issue 2, Pages 258-270Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijnonlinmec.2007.01.013
Keywords
swelling; non-linear elasticity; fiber recruitment; constitutive behavior; soft tissue biomechanics
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We study the effect of fiber recruitment on the mechanical response of a fiber reinforced non-linearly elastic tube that is both swollen and pressurized. Attention is restricted to cylindrically symmetric tube deformation. The constitutive model permits fibers to support tension, but not compression. While many combinations of pressure and swelling cause all of the fibers to be recruited for load support, both large swelling and large deswelling can give rise to fiber derecruitment at certain locations in the tube. This leads to less channel opening than would be the case if the fibers provided support while contracted. The transition between mechanically active and mechanically inactive fibers can be described in terms of the quasi-static motion of a fiber recruiting interface. (C) 2007 Elsevier Ltd. All rights reserved.
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