Dynamic Burst Pressure Simulation of Cylinder-Cylinder Intersections

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.