Research Papers: Design and Analysis

Burst Pressure of Pressurized Cylinders With Hillside Nozzle

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

College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing, 210009, P.R.C.

L. P. Xue

 MMI Engineering, Inc., Houston, TX 77077

G. E. O. Widera

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

J. Pressure Vessel Technol 131(4), 041204 (Jun 12, 2009) (6 pages) doi:10.1115/1.3147987 History: Received April 02, 2007; Revised February 10, 2009; Published June 12, 2009

The burst pressure of cylinders with hillside nozzle is determined using both experimental and finite element analysis (FEA) approaches. Three full-scale test models with different angles of the hillside nozzle were designed and fabricated specifically for a hydrostatic test in which the cylinders were pressurized with water. 3D static nonlinear finite element simulations of the experimental models were performed to obtain the burst pressures. The burst pressure is defined as the internal pressure for which the structure approaches dimensional instability, i.e., unbounded strain for a small increment in pressure. Good agreement between the predicted and measured burst pressures shows that elastic-plastic finite element analysis is a viable option to estimate the burst pressure of the cylinders with hillside nozzles. The preliminary results also suggest that the failure location is near the longitudinal plane of the cylinder-nozzle intersection and that the burst pressure increases slightly with an increment in the angle of the hillside nozzle.

Copyright © 2009 by American Society of Mechanical Engineers
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Figure 1

Construction of model vessel (β=25 deg)

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Figure 2

True stress-strain curves for construction materials

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Figure 3

Details of welds (dimensions in mm)

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Figure 4

Rupture of test models

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Figure 5

Microstructure of the facture

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Figure 6

Finite element mesh of model vessel No. 2

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Figure 7

Location where maximum equivalent plastic strain occurs

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Figure 8

Pressure versus equivalent plastic strain at critical points of FEA models

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Figure 9

Contour plot of nodal von Mises stress for model 2

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Figure 10

Effect of angle “beta” on vessel with hillside nozzle



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