Appropriate Coupling Solvers for the Numerical Simulation of Rolled Homogeneous Armor Plate Response Subjected to Blast Loading

Ahmad Mujahid Ahmad Zaidi,Gunasilan Manar,Fuad Shah Koslan,Zaid Othman

doi:10.1155/2013/637564

Ahmad Mujahid Ahmad Zaidi, Gunasilan Manar + Show 2 more

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https://doi.org/10.1155/2013/637564

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Abstract

Rolled homogeneous armor (RHA) plate subjected to blast loading is a complex problem involving the nonlinear fluid-structure interaction. The numerical techniques using the spatial discretization scheme that has been provided as a solver in the AUTODYN computer code will be used in this study in order to predict the RHA response subjected to explosive (TNT) blast loading. The final deflection will be used as a reference in order to identify the suitable solver for both materials RHA and TNT; then the plastic deformation will be chosen in the simulation process. Instead of using the same solver for RHA and TNT domains, the optimization of solver can be achieved if it is only used in an appropriate domain, or in other words, a different domain will be using different solver. The solvers, which were available in AUTODYN, were used in the analysis of impact and explosion or fluid-structure interaction. Therefore, in this paper, we will determine the suitable solver for both materials (TNT and RHA plate), and the appropriate interaction coupling solver will be obtained. Defining TNT and RHA plates using the Arbitrary Lagrangian Eulerian solver has found the best coupling solver for this case study when compared with existing experimental data. This coupling solver will be used for future analysis in simulating blast-loading phenomena.

Highlights

In the blast phenomena, interaction between fluid and structure, called fluid-structure interaction (FSI), normally will occur, and there is no single method that can be used for all conditions in FSI analysis [1]
Defining TNT and Rolled homogeneous armor (RHA) plates using the Arbitrary Lagrangian Eulerian solver has found the best coupling solver for this case study when compared with existing experimental data
Interaction between fluid and structure, called fluid-structure interaction (FSI), normally will occur, and there is no single method that can be used for all conditions in FSI analysis [1]

Summary

Introduction

Interaction between fluid and structure, called fluid-structure interaction (FSI), normally will occur, and there is no single method that can be used for all conditions in FSI analysis [1]. The solution over the time domain can be achieved by an explicit method [2]. It can be obtained by utilizing different spatial discretization such as Lagrange, Euler, and Arbitrary Lagrangian Eulerian (ALE) or mesh-free method known as Smooth Particle Hydrodynamic (SPH) methods [1]. The basic solvers for explicit integration numerical wavecodes (sometimes termed “hydro-codes”) can be utilized as an outline with their associated strengths and weaknesses [3]. The numerical solver be used in AUTODYN generally fall into the following methods which are Lagrange, Euler, ALE, and SPH methods. With intelligent selection of suitable solver for various regimes, an optimal solution in terms of accuracy and efficiency can be achieved. The appropriate solvers in AUTODYN will be carried out, and the effect on a final result will be discussed further

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