The effect of aspect ratio on adhesion and stiffness for soft elastic fibres.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 21227962.
- Also identified by DOI 10.1098/rsif.2010.0582 and PMC identifier 3119877.
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Abstract
The effect of aspect ratio on the pull-off stress and stiffness of soft elastic fibres is studied using elasticity and numerical analysis. The adhesive interface between a soft fibre and a smooth rigid surface is modelled using the Dugdale-Barenblatt model. Numerical simulations show that, while pull-off stress increases with decreasing aspect ratio, fibres get stiffer. Also, for sufficiently low aspect ratio fibres, failure occurs via the growth of internal cracks and pull-off stress approaches the intrinsic adhesive strength. Experiments carried out with various aspect ratio polyurethane elastomer fibres are consistent with the numerical simulations.
Medical subject headings
- Materials Testing
- Models, Theoretical
- Polyurethanes