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RESEARCH PAPERS

Equibiaxial Low-Cycle Fatigue Properties of Typical Pressure-Vessel Steels

[+] Author and Article Information
K. D. Ives

The Babcock & Wilcox Research Center, Alliance, Ohio

L. F. Kooistra, J. T. Tucker

The Babcock & Wilcox Company, Barberton, Ohio

J. Basic Eng 88(4), 745-754 (Dec 01, 1966) (10 pages) doi:10.1115/1.3645956 History: Received April 06, 1965; Online November 03, 2011

Abstract

Large-size circular-plate specimens made of typical pressure-vessel materials were tested to determine their low-cycle fatigue strength. The test consisted of two distinct phases; i.e., development of an appropriate testing apparatus and the fatigue testing of the plate specimens. A unique apparatus was developed to test simply supported, circular plate-type specimens. Through a hydraulic system, a uniform pressure was applied to the specimen that resulted in a state of equibiaxial strain at the center of the plate. Tests were conducted to evaluate the pressure-deflection characteristics for various specimen strain levels. Biaxial fatigue data with a strain ratio (circumferential to radial) of 1:1 were generated for three pressure-vessel materials (A-201, A-302, T-1) for a completely reversed strain cycle. Initial cracking was used as a criterion of failure. Cracks were determined by monitoring electrical-resistance strain gages mounted on the specimen.

Copyright © 1966 by ASME
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