Numerous phenomenological relationships have been proposed in the past to describe the shape of the creep curve. These equations are generally found to apply over restricted temperature and stress ranges. In the present work, it is suggested that creep may be considered in terms of a damped dynamical system, using the equation dS/dt+ωS = 0 where S is the strain rate after time t, and ω is an effective damping coefficient, which is a function of time and strain rate. A procedure is described by which a creep curve may be analysed in terms of the above equation. It is shown that this equation can provide a unifying base to many of the equations used previously.
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