Bending instabilities of soft biological tissues

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Title: Bending instabilities of soft biological tissues
Authors: Destrade, Michel
Ní Annaidh, Aisling
Coman, Ciprian D.
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Date: Dec-2009
Abstract: Rubber components and soft biological tissues are often subjected to large bending deformations while 'in service'. The circumferential line elements on the inner face of a bent block can contract up to a certain critical stretch ratio λcr (say) before bifurcation occurs and axial creases appear. For several models used to describe rubber, it is found that λcr=0.56, allowing for a 44% contraction. For models used to describe arteries it is found, somewhat surprisingly, that the strain-stiffening effect promotes instability. For example, the models used for the artery of a seventy-year old human predict that λcr=0.73, allowing only for a 27% contraction. Tensile experiments conducted on pig skin indicate that bending instabilities should occur even earlier there.
Type of material: Journal Article
Publisher: Elsevier
Journal: International Journal of Solids and Structures
Volume: 46
Issue: 25-26
Start page: 4322
End page: 4330
Copyright (published version): 2009 Elsevier
Keywords: Large bendingNonlinear elasticityBifurcationStrain-stiffening effectSoft biological tissue modeling
DOI: 10.1016/j.ijsolstr.2009.08.017
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

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