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Research Papers: Design and Analysis

Dynamic Burst Pressure Simulation of Cylindrical Shells

[+] Author and Article Information
Cunjiang Cheng

Bjorksten Research Laboratory, BIT 7, Inc., Madison, WI 53718Cunjiang.Cheng@gmail.com

G. E. O. Widera

Center for Joining and Manufacturing Assembly, Marquette University, Milwaukee, WI 53233geo.widera@mu.edu

J. Pressure Vessel Technol 131(6), 061205 (Oct 13, 2009) (11 pages) doi:10.1115/1.4000205 History: Received January 19, 2009; Revised September 04, 2009; Published October 13, 2009

The object of this study is to determine the short-term burst pressure of metal cylinders under short-term dynamic loading conditions. The finite element method via the use of the LS-DYNA code (1998, LS-DYNA Theoretical Manual, Livermore Software Technology Corporation) is used to carry out the study. The influence of the geometric parameters diameter (D) and wall thickness (T) as well as loading parameters such as the dynamic pressure versus time function is examined. Additionally, an empirical formula based on experimental data and incorporating the ultimate dynamic strength of low carbon steel is developed. Based on the agreement between the results of the finite element analyses and those of the empirical formula, it can be concluded that a properly modeled finite element analysis (FEA) can be employed with sufficient accuracy to study the short-term dynamic burst pressures of metal cylinders.

Copyright © 2009 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Stress-strain curve of A-106B steel at different strain rates

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Figure 2

Cylinder shape and dimensions

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Figure 3

Pressure spike curves for different spike duration

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Figure 4

Boundary conditions of FEA model

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Figure 5

First configuration (L=4D, 3 layers, 0.115RT element size)

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Figure 6

von Mises stress (109 Pa) distribution at 5.2005 ms

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Figure 7

Effective plastic strain (mm/mm) versus time (ms)

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Figure 8

Pressure and plastic strain versus time

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Figure 9

Second configuration (L=4D, 1 layer, 0.343RT element size)

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Figure 10

Third configuration (L=8D, 1 layer, 0.343RT element size)

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Figure 11

Burst pressure versus pulse duration of 14 in. OD cylindrical shell with different wall thickness (T)

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Figure 12

Burst pressure versus pulse duration of 14 in. OD cylindrical shell with wall thickness of 0.375 and 0.438 in.

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Figure 13

Burst pressure versus pulse duration of 10.5 in. OD cylindrical shell with different wall thicknesses

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Figure 14

Burst pressure versus pulse duration of 7 in. OD cylindrical shell with wall thickness of 0.0825 and 0.219 in.

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Figure 15

Burst pressure versus diameter-thickness ratio (OD=14 in.)

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Figure 16

Burst pressure versus diameter-thickness ratio (OD=10.5 in.)

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Figure 17

Burst pressure versus diameter with D/T ratio at 83.85

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Figure 18

Burst pressure versus diameter with D/T ratio of 30.96

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