Bending instabilities of soft biological tissues

Michel Destrade, Aisling Ní Annaidh, Ciprian D. Coman

Research output: Contribution to journalArticle

64 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)4322-4330
Number of pages9
JournalInternational Journal of Solids and Structures
Issue number25-26
Early online date28 Aug 2009
Publication statusPublished - 15 Dec 2009
Externally publishedYes

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