Modares Mechanical Engineering

Modares Mechanical Engineering

2D Numerical simulation of the nonlinear deformation of thin plate under gaseous mixture detonation axisymmetric loading

Document Type : Original Research

Authors
Mojtaba Haghgoo 1
Hashem Babaei 2
Tohid Mirzababaie mostofi 3
1 MSc, Mechanical Engineering Department, Mechanical Engineering Faculty, University of Guilan, Rasht
2 Associate Professor, Department of Mechanical Engineering, Faculty of Mechanical Engineering, University of Guilan, Rasht, Iran
3 Assistant Professor of Mechanical EngineeringDepartment of Mechanical EngineeringFaculty of Electrical, Mechanical & Computer Engineering, University of Eyvanekey, Eyvanekey, Iran
Abstract
Numerical simulation of Eulerian fluid Lagrangian solid interaction incorporating H2-O2 mixture gas detonation plate forming by employing conservative element and solution element immersed boundary method in LS-DYNA software is proposed in this paper. The detonation mechanism includes 7 species and 16 reactions. The chemical reaction mechanism and detonation wave propagation of Eulerian solver and dynamic plastic response of mild steel thin plate of Lagrangian solver are discussed thoroughly. The Johnson-Cook phenomenological material model with failure criterion is used to provide accurate predictions of dynamic response and failure state of detonation loaded steel plates taking into account material strain-rate sensitivity and non-linearities. The 2D numerical model is validated by comparing the simulation results with experimental data for thickness strain. The simulated pressure-time history of combustion cylinder, von Mises stress and deflection pattern of plate are also represented. Furthermore, a series of numerical simulation was carried out to determine the effect of the magnitude of internal detonation pressure on plate, taking into account different combustion cylinder longitudinal capacities, pre-detonation pressures and ignition point locations. Results show that an increase of pre-detonation pressure is conducive to increase the value of maximum detonation pressure while decreasing the combustion duration. Moreover, combustion cylinder with higher longitudinal capacity is more powerful to deform the plate.
Keywords
Numerical simulation
Chemical reaction
Fluid-solid interaction
Immersed Boundary Method
Gaseous Detonation

Subjects

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Modares Mechanical Engineering
Volume 21, Issue 11
September 2021
Pages 729-742