Redundant Deformation Factor Evaluation Through the Stress-Strain Curves Superposition Method in Round Section Bar Drawing—A Literature Analysis

[+] Author and Article Information
P. R. Cetlin

Department of Metallurgical Engineering, Universidade Federal de Minas Gerais, 30.000, Belo Horizonte, MG, Brazil

J. Eng. Mater. Technol 109(4), 272-275 (Oct 01, 1987) (4 pages) doi:10.1115/1.3225976 History: Received May 01, 1987; Online September 15, 2009


An analysis of the stress-strain curves superposition method for the evaluation of the average deformation ε and redundant deformation factor φ is presented. This approach, originally proposed by Hill and Tupper, makes unrealistic suppositions, which led to some confusion in the literature concerning curve superposition criteria; the values of φ depend on the material, contrarily to Hill and Tupper’s original idea. If the technique is to be used, it is necessary to establish clear and objective superposition criteria.

Copyright © 1987 by ASME
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