FEM Analysis of the Collapse Strength of a Tube

[+] Author and Article Information
K. Tokimasa, K. Tanaka

Central Research Laboratories, Sumitomo Metal Industries, Ltd., Amagasaki, Japan

J. Pressure Vessel Technol 108(2), 158-164 (May 01, 1986) (7 pages) doi:10.1115/1.3264764 History: Received July 20, 1984; Revised July 31, 1985; Online November 05, 2009


Using the FEM program, the effects of geometry, residual stress and the elasticplastic behavior of material on the collapse strength of a tube is analyzed and the following results are obtained. The plastic collapse pressure is maximum when the circumferential residual stress on the inner surface is tensile and is equal to 0.7σy . The plastic collapse pressure of a perfectly round tube can be approximately estimated by the following equation independent of the plastic-hardening behavior of the material: P = 2σ0.04 (D /t − 1)/(D /t )2 . Based on these FEM results, a new formula is presented to evaluate the collapse strength of a tube.

Copyright © 1986 by ASME
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