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RESEARCH PAPERS

Fatigue of Thick Steel Plates Bent to a Low R/t Ratio

[+] Author and Article Information
H. Vossoughi, K. Soudki, R. N. White, A. R. Ingraffea, M. Sansalone

Department of Structural Engineering, Cornell University, Ithaca, NY 14853

J. Pressure Vessel Technol 111(3), 259-265 (Aug 01, 1989) (7 pages) doi:10.1115/1.3265673 History: Received May 01, 1988; Revised December 05, 1989; Online November 05, 2009

Abstract

The use of cold-bent plates, instead of welded corner joints, in the fabrication of pressure vessels can reduce production costs. The cold-bending operation is relatively easy, inexpensive, and requires minimum quality control. The attractiveness of using cold-bent plates as a potential substitute for plates with welded corner joints motivated the fatigue study described here. Fatigue test resutls are reported for nineteen 25-mm thick HY80 and HY100 steel plates, cold-bent to a nominal bend angle of 90 deg and an R /t (inner bend radius/thickness) of 1.5, and ten 25-mm thick HY80 welded corner joints. Testing was performed under zero-to-tension loading (stress ratio R = 0) at room temperature and at a frequency of 4 Hz on specimens that retained the actual cold-bending-induced residual stresses. These test results indicate that the cold-bent plates may be a good alternative to welded corner joints for cyclic loading histories.

Copyright © 1989 by ASME
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