Study on the Stress Concentration at the Round Corners of Flat Heads in Pressure Vessels Subjected to Internal Pressure

[+] Author and Article Information
H. Chen, J. Jin, J. Yu

Department of Mechanical Engineering, Beijing University of Chemical Technology, P.O. Box 53, Beijing 100029, P.R. China

J. Pressure Vessel Technol 118(4), 429-433 (Nov 01, 1996) (5 pages) doi:10.1115/1.2842209 History: Received September 12, 1995; Revised January 16, 1996; Online February 11, 2008


Results from finite element analysis were used to show that the stress index k σ and the nondimensionalized highly stressed hub length kh of a flat head with a round corner in a pressure vessel subjected to internal pressure are functions of three dimensionless parameters: λ ≡ h/dt, η ≡ t/d, and ρ ≡ r/t . Approximate formulas for estimating k σ and k h from λ, η, and ρ p are given. The formulas can be used for determining a suitable fillet radius for a flat head in order to reduce the fabricating cost and to keep the stress intensity at the fillet under an acceptable limit.

Copyright © 1996 by The American Society of Mechanical Engineers
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