Modeling of 316 Stainless Steel (17.12 Sph.) Mechanical Properties Using Biaxial Experiments—Part I: Experiments and Basis of the Model

[+] Author and Article Information
P. Delobelle, C. Oytana

Laboratoire de Mécanique Appliquée associé au CNRS, Besancon Cedex, France

J. Pressure Vessel Technol 109(4), 449-454 (Nov 01, 1987) (6 pages) doi:10.1115/1.3264929 History: Received June 23, 1987; Online November 05, 2009


Experimental results aimed at establishing the relationship existing between plastic instantaneous and creep strains are reported. They are chiefly tensile at constant strain rates and tensile or tensile-torsion creep experiments. Recovery and hardening are also measured. It is shown that two types of viscous behavior may occur according to whether the loading path is an active loading or an unloading. The features of these two types of viscoplastic behavior are such that they can be modeled with the same plastic state equation using a single internal variable. But according to a criterion based on internal variables, the single internal variable of the plastic state equation may split into the sum of an isotropic and a kinematical variable with small strain hardening (case of large viscoplastic strains) or remain a single kinematical variable with very high hardening (case of unloadings). The bases of the model are described.

Copyright © 1987 by ASME
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