Analytical performance study of explosively formed projectiles

Hussain, G.; Hameed, Amer; Hetherington, J.G.; Malik, Abdul; Sanaullah, Khairuddin

doi:10.1134/s0021894413010021

Cited by 23 publications

(21 citation statements)

References 3 publications

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“…These velocities' distributions are responsible for the final forming time and for the appropriate final quality of projectile shaping during explosively driven propulsion. Finally, positive remarks, are that, papers [1] (part 1, p. 285), and [2] (p. 167), as well as paper [17], obtained similar values for the liners' temperatures as in this research. Relations of temperatures vs. effective plastic strains exposed in the paper [16], also proved data obtained in this papaer.…”

Section: Sequences Analyses Of the Liner's Particular Points Behaviorsupporting

confidence: 73%

“…9, achieving temperatures of about 500 K for the front layer, to 600 K for the back layer. The same effect is visible on the graph of average temperatures vs. testing time, for the variable materials exposed in the paper [17]. The most of back layer points achieved approximately the same temperature of about 530-550 K, as well as front leyer points that slowly increase to the similar values.…”

Section: Sequences Analyses Of the Liner's Particular Points Behaviorsupporting

confidence: 64%

“…The problem of temperature and its influence on the liner's deformation is presented in the papers [1,[16][17][18]. The numerical approach in the papers [17,19,20] is set up to test the influencing comparative parameters of the temperature values and initial velocity of the EFP as its dynamical performance. In the paper [1] the basic statement about shaping of EFP is exposed as the condition that effective plastic strain has to be constant in shaping time, to avoid liner mass loses, made by critical stretching during prompt deformation.…”

Section: Introductionmentioning

confidence: 99%

“…Paper [17], as well as [1] seem more comprehensive regarding average values of temperatures and deformation energy vs. time but also missed particular considerations of mentioned performances along liner. Deformation analyses derived by [14] used Johnson-Cooks' approximation for the strain-stress and absorbed energy, valid for the process of plastic deformation as the cause for the increasing temperatures in the roughly observed parts of liners' volume.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of changes in temperature and pressure fields during high speed projectiles forming by explosion

et al. 2016

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The research in this paper considered the temperatures fields as the consequently influenced effects appeared by plastic deformation, in the explosively forming process aimed to design explosively formed projectiles. As the special payloads of the missiles, used projectiles are packaged as the metal liners, joined with explosive charges, to design explosive propulsion effect. Their final form and velocity during shaping depend on distributed temperatures in explosively driven plastic deformation process. Developed simulation model consider forming process without metal cover of explosive charge, in aim to discover liner's dynamical correlations of effective plastic strains and temperatures in the unconstrained detonation environment made by payload construction. The temperature fields of the liner's copper material are considered in time, as the consequence of strain/stress displacements driven by explosion environmental thermodynamically fields of pressures and temperatures. Achieved final velocities and mass loses as the expected explosively formed projectiles performances are estimated regarding their dynamical shaping and thermal gradients behavior vs. effective plastic strains. Performances and parameters are presented vs. process time, numerically simulated by the Autodyne software package.

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Section: Sequences Analyses Of the Liner's Particular Points Behaviorsupporting

confidence: 73%

Section: Sequences Analyses Of the Liner's Particular Points Behaviorsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simulation of changes in temperature and pressure fields during high speed projectiles forming by explosion

et al. 2016

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“…G. Hussain et al [5][6][7] carried out both numerical simulations and experiments to study the effects of the liner materials-mild steel, copper, Armco iron, tantalum, and aluminum. Aluminum showed to be a kind of reliable EFP liner material, which could form a complete hollow EFP with the highest velocity when compared with other materials with the same constant liner wall thickness.…”

Section: Introductionmentioning

confidence: 99%

Research on Feasibility of Several High Density Materials for EFP Liner and Material Selection Criteria

Ding

Jiang

Men

et al. 2017

Propellants Explo Pyrotec

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In order to find new kinds of EFP liner materials with high density, W alloys, Ni, Mo, U, and U alloy were selected to be tested. Both liner test and flyer plate test were carried out in experiment, with existing EFP liner materials being testified as reference. It turned out that among the selected materials only Ni was suitable for EFP liner material, other potential candidates fractured to different extent in experiment. The potential reasons of materials’ fracturing under explosive loading were analyzed through different scales in fracture mechanics. Characteristics of a feasible candidate material for EFP liner were discussed through fracture toughness KIC, impact toughness αk, damage tolerance dy, and microstructure mechanics analysis. Finally material selection criteria of EFP liner were presented. The research results are significant in the material selection of EFP liner especially within high density materials, and it can be important guidelines for the researchers to avoid the blindness in research investments and waste in experiments in EFP research field.

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Structural Design and Parameter Optimization of Linear Explosive Forming Projectile

Liu

Wang

2022

Propellants Explo Pyrotec

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The development of new warhead structures is an important means to enhance the destructive ability of projectiles. Compared with the traditional projectiles, the shaped charge warhead has a better destructive effect. Based on the traditional optimization method, a multi‐objective optimization method based on an approximate model is used for the structural design of linear explosive forming projectile (LEFP). In this paper, four different methods are applied to optimize the structure of LEFP. Numerical simulations of penetration into steel target are carried out for the optimization results, and the reliability of the numerical results are verified by experiments. The results indicate that: 1) the optimization method can improve the molding effect and penetration ability of LEFP reliably; 2) the combined optimization method has obvious advantages in promoting the performance of LEFP over the single one.

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Analytical performance study of explosively formed projectiles

Cited by 23 publications

References 3 publications

Simulation of changes in temperature and pressure fields during high speed projectiles forming by explosion

Simulation of changes in temperature and pressure fields during high speed projectiles forming by explosion

Research on Feasibility of Several High Density Materials for EFP Liner and Material Selection Criteria

Structural Design and Parameter Optimization of Linear Explosive Forming Projectile

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