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RESEARCH PAPERS

Description of Nonproportional Cyclic Plasticity of Stainless Steel by a Two-Surface Model

[+] Author and Article Information
Yukio Takahashi, Takashi Ogata

Central Research Institute of Electric Power Industry, Komae-shi, Tokyo 201, Japan

J. Appl. Mech 58(3), 623-630 (Sep 01, 1991) (8 pages) doi:10.1115/1.2897241 History: Received July 29, 1988; Revised May 09, 1990; Online March 31, 2008

Abstract

A simple elastic-plastic constitutive model based on the two-surface theory is developed to describe deformation behavior of austenitic stainless steels under multiaxial cyclic loading. Dependency of saturated stress range both on strain range and the proportionality of loading is considered. To establish a precise procedure for determination of material constants for nonproportional loading, the intervariable relation in the axial-torsional circular strain-path condition is studied in detail. A full procedure is then developed for determination of all material parameters. Finally, the effectiveness of the present model is demonstrated by application to axial-torsional cyclic tests for type 304 stainless steel at 550°C.

Copyright © 1991 by The American Society of Mechanical Engineers
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