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Research Papers: Design and Analysis

Dynamic Burst Pressure Simulation of Cylinder-Cylinder Intersections

[+] Author and Article Information
Cunjiang Cheng

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

G. E. Otto Widera

Center for Joining and Manufacturing Assembly, Marquette University, Milwaukee, WI 53718geo.widera@mu.edu

J. Pressure Vessel Technol 132(1), 011201 (Dec 04, 2009) (10 pages) doi:10.1115/1.4000359 History: Received January 19, 2009; Revised July 09, 2009; Published December 04, 2009; Online December 04, 2009

In this study, the determination of the burst pressure of a series of cylinder-cylinder intersections representing vessels of diameter D and wall thickness T, and nozzles of diameter d and wall thickness t subjected to short-term dynamic loading is investigated. Dynamic simulations via the use of the finite element method are carried out to determine the effects of dimensionless parameters d/D, D/T, and t/T, as well as pressure versus time history. The LS-DYNA (1998, LS-DYNA Theoretical Manual, Livermore Software Technology Corporation) software is employed to model and analyze various intersections for the geometric parameter ranges 0.1d/D<1.0, 0.1t/T3, and 50D/T250. The use of both solid and shell elements is investigated and applied in this study. A correlation equation to predict the dynamic burst pressure of cylinder-cylinder intersections is proposed based on the parametric finite element analyses. Static test data are used to verify the dynamic correlation equation by applying a relatively long pressure pulse duration.

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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

Pressure spike curves for different spike durations

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Figure 3

von Mises stress distribution before and after burst

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Figure 4

Pressure applied to all of the inside surfaces

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Figure 5

Pressure applied to 1/3 of the inside surface

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Figure 6

Pressure applied to 2/3 of the inside surface

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Figure 7

Solid eight-node mesh of model with d/D=0.1, t/T=0.1, and D/T=50

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Figure 8

Shell four-node mesh of model with d/D=0.1, t/T=0.1, and D/T=50

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Figure 9

von Mises stress (GPa) distribution by using solid element (after burst)

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Figure 10

von Mises stress (GPa) distribution by using selected reduced integration Hughes–Liu shell element (after burst)

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