Abstract

SYNOPSIS Elastomeric O-ring seals perform essential functions in domestic equipment, transport and the energy industries, often over many years and in environments which are demanding in terms of fluid exposure, temperature or both. In this chapter a step towards improved service life prediction of these components is described. The literature and work performed by the authors on pertinent aspects of the long-term behaviour of elastomers including stress relaxation and set are discussed, as are experiments to study seal failure directly. It is concluded that current methods for life prediction may not be appropriate in all cases. Alternative approaches are suggested.

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