Abstract
The application of finite linear viscoelastic theory to elastomeric networks is discussed. It is shown that the time dependent behaviour of rubber-like materials in moderately large deformations can be described successfully by introducing a suitable chosen non-linear strain measure into the Boltzmann superposition integral. A new two-term elastic potential is proposed. The first term is the neo-Hookean potential predicted by the statistical theory of rubber elasticity for a ‘perfect’ network. The second accounts for contributions arising from the topological constraints which are generally present in real networks. The resulting two-network theory is verified on hand of published data.
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