Abstract
In a screw-driven machine, the transition from tension to stress relaxation occurs over a finite time that is required by the cross head to decelerate from a constant speed (tension) to a dead stop (relaxation). Computer simulation with a simple yet realistic model shows that several apparently anomalous features of early stress relaxation can be ascribed to this transition time. The extent to which transition time modifies the early relaxation is found to depend upon the strain rate sensitivity of the flow stress of the specimen, the machine stiffness and the strain rate in tension
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