Abstract
Creep, stress relaxation and set are all methods of investigating the longterm effects of an applied stress or strain. Creep is the measurement of the increase of strain with time under constant force; stress relaxation is the measurement of change of stress with time under constant strain, and set is the measurement of recovery after the removal of an applied stress or strain. It is important to appreciate that there are two distinct causes for the phenomena of creep, relaxation and set: the first is physical and the second is chemical. The physical effect is due to rubbers being viscoelastic, as discussed in Chapter 9, and the response to a stress or strain is not instantaneous but develops with time. The chemical effect is due to ‘ageing’ of the rubber by oxidative chain scission, further cross-linking or whatever.
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© 1996 R. P. Brown
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Brown, R.P. (1996). Creep, relaxation and set. In: Physical Testing of Rubber. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0529-3_11
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DOI: https://doi.org/10.1007/978-94-011-0529-3_11
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