Prediction of Fracture Stresses of High Pressure Gas Cylinders Containing Cracklike Flaws

[+] Author and Article Information
Mahendra D. Rana

 Praxair, Inc., 175 East Park Drive, Tonawanda, NY 14151mahendra̱rana@praxair.com

George B. Rawls

 Savannah River National Laboratory, Building 773-41A, Room 173, Aiken, SCgeorge.rawls@srnl.doe.gov

J. Pressure Vessel Technol 129(4), 639-643 (Oct 24, 2006) (5 pages) doi:10.1115/1.2767346 History: Received September 19, 2006; Revised October 24, 2006

Full scale tests were conducted on high pressure gas cylinders containing cracklike flaws. The cylinders were then pressurized to destruction, and the membrane hoop stress at failure in the cylinder wall was calculated from the failure pressure. Mechanical properties, including tensile and fracture data, were obtained on specimens representing the heats of the tested cylinders. Analyses were performed to predict the failure stresses using several methods available in the open literature. This paper presents the results of the predicted and measured fracture stresses.

Copyright © 2007 by American Society of Mechanical Engineers
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Figure 1

Photograph of tested cylinder 3

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Figure 2

FAD for cylinder 3 with Kmat=KIC(J)

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Figure 3

Level 3 FAD ductile tearing cylinder 1

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Figure 4

Comparison of results




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