Unaxial tensile tests have been conducted on commercially pure lead and cellulose nitrate, both time-dependent materials. It is shown that it is possible to predict all the important features of a tensile stress-strain curve from creep-test data, including the dependence of the curve upon extension rate.
The behaviour of cellulose nitrate at the yield point is shown to be similar in nature to that of lead at the ultimate point. The stresses at these particular points were predicted with remarkable accuracy from the creep data over a range of extension rates from 1 per cent per minute up to 100 per cent per minute.
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