Author(s)

S.J. Jerrams & J. Bowen

Abstract

Finite element software for analysing components made from rubber-like materials employ strain energy functions to enable the determination of stress and displacement. Most use Mooney-Rivlin constants to define the material behaviour and these constants are simply related to the rigidity modulus for a given material. The statistical theory for the stress-strain relationship for rubbers implies that the material will obey Hooke's Law in shear though not in tension or compression. Previous research suggests that the modulus of rigidity remains constant for shear strains up to 1 .0. Values for rigidity modulus for a 60IRHD rubber are determined from standard tests on dual-lap and quad-lap specimens. These are compared with the value given by the manufacturer, that determined from

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