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RESEARCH PAPERS

On the Collapse of Long, Thick-Walled Tubes Under External Pressure and Axial Tension

[+] Author and Article Information
R. Madhavan

California Institute of Technology, Pasadena, CA 91125

C. D. Babcock

GALCIT, California Institute of Technology, Pasadena, CA 91125

J. Singer

Technion, Israel Institute of Technology, Haifa, Israel

J. Pressure Vessel Technol 115(1), 15-26 (Feb 01, 1993) (12 pages) doi:10.1115/1.2929488 History: Received March 25, 1992; Revised October 22, 1992; Online June 17, 2008

Abstract

The paper presents the results from a combined experimental and analytic study on the collapse of long, thick-walled tubes subjected to external pressure and axial tension. The experiments involved tubes of diameter-to-thickness ratio (Dm /t ) 10 to 40. Collapse envelopes were obtained for two different pressure-tension loading paths. Collapse tests involving initially ovalized tubes were also carried out. The collapse strength predicted with a two-dimensional elasto-plastic model applying J2 flow rule was in good agreement with the experiments. The results show that the collapse strength under combined loading is strongly influenced by initial ovality and that the shape of the stress-strain curve has a significant influence on the tension-pressure collapse envelope.

Copyright © 1993 by The American Society of Mechanical Engineers
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