Steady and Transient Creep Behavior Based on Unified Constitutive Equations

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Abstract
A set of constitutive equations, which has been used to describe a variety of quasi-static and dynamic viscoplastic phenomena, are applied to creep problems. Simulations of steady and transient creep at constant stress are obtained which compare well with experimental results both qualitatively and quantitatively. Simulations of creep resulting from rapid changes in the applied stress also compare well with observations. The constitutive equations can be used to describe logarithmic creep. These latter predictions are compatible with experimental results in considerable detail.

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