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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

## Abstract

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 $0.1≤d/D<1.0$, $0.1≤t/T≤3$, and $50≤D/T≤250$. 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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## Figures

Figure 1

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

Figure 2

Pressure spike curves for different spike durations

Figure 3

von Mises stress distribution before and after burst

Figure 4

Pressure applied to all of the inside surfaces

Figure 5

Pressure applied to 1/3 of the inside surface

Figure 6

Pressure applied to 2/3 of the inside surface

Figure 7

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

Figure 8

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

Figure 9

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

Figure 10

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

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