Elastic Stresses of Pressurized Cylinders With Hillside Nozzle

[+] Author and Article Information
H. F. Wang, Z. F. Sang

Department of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing, 210009, P.R. China

L. P. Xue, G. E. Widera

Department of Mechanical and Industrial Engineering, Marquette University, Milwaukee, WI 53233

J. Pressure Vessel Technol 128(4), 625-631 (Apr 27, 2006) (7 pages) doi:10.1115/1.2349576 History: Received November 05, 2005; Revised April 27, 2006

The purpose of this work is to investigate the elastic stress and deformation of pressurized cylinders with a hillside nozzle. Two full-scale test models were designed and fabricated specially for the test. A 3D finite element numerical analysis was also performed. The elastic stress distribution, stress concentration range, deformation characteristics, and stress concentration factor were obtained. The elastic results show that the distinct stress concentration occurs on the hillside-nozzle intersection, and the intersection shrinks in the longitudinal section of cylinder, while a bulge appears in the transverse section. The range of stress concentration of the hillside-nozzle intersection in the transverse section of the cylinder is larger than that in the longitudinal section and the stress concentration factor declines with the increment of the angle β. The results will serve as the basis for developing a design guideline for pressurized cylinders with various angles of the hillside nozzle.

Copyright © 2006 by American Society of Mechanical Engineers
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Figure 1

Geometry and dimension of the model

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Figure 2

Construction of the model vessel No. 2 (β=25deg)

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Figure 3

Details of the welds (dimension in mm)

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Figure 4

Location of strain gauges of vessel No. 1 (β=0deg)

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Figure 5

Location of strain gauges of vessel No. 2 (β=25deg)

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Figure 6

Distribution of elastic stresses on the outside surface of the test vessels (from test, p=2MPa)

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Figure 7

Finite element mesh of model vessel (β=25deg)

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Figure 8

Distribution of elastic stresses on the outside surface of the hillside nozzle with angle β=25deg (from FEA, p=2MPa)

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Figure 9

The maximum principle stress and deformation of the model No. 2 (displacement scale=400, p=2MPa)

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Figure 10

Maximum stress concentration factors of the hillside nozzles



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