State Variable Approach to Transient Creep Deformation in Stress Reduction Experiments

摘要

Stress reduction experiments have been widely used to explore the internal state of a creeping material. Although there has been some criticism of the use of this method to measure internal stress directly, data from stress reduction experiments can be used to generate parameters for state variable models that are verified by other means. In this paper the predictions of a state variable approach to stress reduction experiments are explored in detail and compared to previously published data. The state variable model is shown to give a consistent description of the processes involved during the transient deformation, and the predictions and the model parameters are found to compare well with the data obtained by other means. (ERA citation 10:021456)