Bending instabilities of soft biological tissues

Michel Destrade, Aisling Ní Annaidh, Ciprian D. Coman

Research output: Contribution to journalArticlepeer-review

84 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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