Analysis and Design of Ellipsoidal Pressure Vessel Heads

[+] Author and Article Information
E. P. Esztergar

La Jolla, Calif.

H. Kraus

Hartford Graduate Center, Rensselaer Polytechnic Institute, East Windsor Hill, Conn.

J. Eng. Ind 92(4), 805-817 (Nov 01, 1970) (13 pages) doi:10.1115/1.3427850 History: Received June 23, 1970; Online July 15, 2010


The paper describes the development of design rules for 2:1 Ellipsoidal Heads. Elastic, elasto-plastic, and limit analysis results are evaluated to determine the lowest failure mode, including buckling under internal pressure. The numerical values of the failure pressure are compared with ASME Code requirements. It is shown that the code rules are overly conservative for thick heads and are unsafe for very thin heads used in low-pressure applications. A simple design formula is developed, based on rational safety factors, in a form adaptable for a pressure vessel code. The need for further work toward improved failure mode analysis is discussed.

Copyright © 1970 by ASME
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