Abstract

The material behaviour of rubber is investigated for a special type of deformations namely small amplitude vibrations superposed on finite static prestrain. By restricting the magnitude of the prestrain it is possible to derive a simplified constitutive equation which can be used to solve simple boundary value problems. On this theoretical background the stiffness of two types of sample geometries were computed and measured in a vibration experiment. The resulting expression for the dynamic sample stiffness contains besides the classical relaxation modulus three other complex, frequency dependent moduli and the static prestrain.

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