Elasticity in Biological Materials
AimsBefore you startIntroductionHookean elasticityS-shaped curvesAneurysmsDemonstration of aneurysmsJ-shaped curvesViscoelasticity and hysteresisSummaryQuestionsGoing furtherTLP creditsTLP contentsShow all contentViewing and downloading resourcesAbout the TLPsTerms of useFeedbackCredits Print this page
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Extension ratio
The extension ratio, λ , is a measure of how much an object has been extended. For an object with initial length l0 and extended length l,
$$\lambda = {l \over {{l_0}}}$$
and so λ = 1 + strain
The extension ratio is commonly used when discussing the mechanical properties of rubber, with tensile strain being used in other applications. In this TLP, both extension ratio and strain are used.