A numerical investigation on explosive fragmentation of metal casing using Smoothed Particle Hydrodynamic method

Kong, Xiangshao; Wu, Weiguo; Li, Jun; Liu, Fang; Chen, Pan; Li, Ying

doi:10.1016/j.matdes.2013.04.041

Cited by 88 publications

(26 citation statements)

References 24 publications

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“…This software is particularly suitable for nonlinear dynamic problems, such as impact or explosion. It allows for the application of different algorithms such as Euler, Lagrange, arbitrary Lagrange-Euler (ALE), and SPH to solve the fluid-structure problems [26][27][28]. Eight-node brick elements with ALE were adopted for the structure.…”

Section: Model and Materialmentioning

confidence: 99%

Parallel Control to Fragments of a Cylindrical Structure Driven by Explosive inside

Chen¹,

Li²,

Lu³

et al. 2015

Mathematical Problems in Engineering

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By analyzing the fragmentation distributions of a cylindrical structure and a specific structure, the necessity of parallel control to the fragments is presented. The shell shape of structures has an influence on the fragment spatial distribution. A new design method for the shell shape is proposed. To facilitate the establishment of the numerical model and the machining for relative experiments, the mathematical description of the theoretical calculated generatrix of the shell is simplified. The fragment spraying processes of the designed structures are simulated, and end effects are analyzed. Based on the theoretical design and plentiful simulation data, the relationships between the size of the parallel fragmentation structure and the optimized curvature radius of the shell are expressed by an equation. The equation is validated by numerical means and can be a reliable reference to the design of the parallel fragmentation structure.

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Section: Model and Materialmentioning

confidence: 99%

Parallel Control to Fragments of a Cylindrical Structure Driven by Explosive inside

Chen¹,

Li²,

Lu³

et al. 2015

Mathematical Problems in Engineering

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“…Hoggatt and Recht [3] further extended to shear fracture mode by perfecting Taylor's model. Mott [4] and Grady [5,6] separately investigated dynamic fragmentation behavior from statistics-based and energy-based perspectives, predicting the relationship between fragment number and loading strain rates and building a systematic theoretical model for fragmentation, which lays the foundation for conducting numerical simulations [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Dynamic shear fracture of an explosively-driven metal cylindrical shell

Ren

Guo

Fan

et al. 2016

International Journal of Impact Engineering

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This work investigates shear fracture behavior occurring in a titanium alloy cylinder internally filled with high explosives through the use of photonic Doppler velocimetry(PDV) array, high-speed framing camera and soft capture tank. The real-time velocity profiles diagnosed by PDV array display from overlapping to scattering, corresponding to the cylinder from uniform expansion to onset of fracture. In addition to the general findings obtained from individual diagnostics, combined analysis from the experimental measurements determines sliding velocity between sheared cracks and the overall adiabatic shear failure process of the metal cylinder is discussed.

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“…However, for confidence, a third warhead configuration is adopted and numerically established to compare with our theoretical formulas. The warhead configuration is taken from Kong's experiment [21], and it is composed of TNT explosive and A235 steel casing. The diameter of the charge is 110 mm and the casing thickness is 6 mm.…”

Section: Full Papermentioning

confidence: 99%

“…The diameter of the charge is 110 mm and the casing thickness is 6 mm. The material parameters used in the model is adopted from [21] with the casing failure model of a principal tensile strain of 0. Table 5.…”

Section: Full Papermentioning

confidence: 99%

New Formula for Fragment Velocity in the Aiming Direction of an Asymmetrically Initiated Warhead

Xiong

et al. 2018

Propellants Explo Pyrotec

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Fragment velocity is an important parameter for fragmentation warheads, but for an asymmetrically initiated warhead, formulas for calculating the fragment velocity in the aiming direction are rare. In this work, new formulas for calculating fragment velocities in the aiming direction and the initiation side of an asymmetrically initiated warhead were established by taking the long element from the warhead section and applying one‐dimensional gas dynamics. Accounting for the assumptions made during the formulas establishing, three experimentally verified warheads modelling of different charge ratios were used to verify the formulas. It is found that the velocity ratios of the modelling to the formulas’ calculations of different warheads are very similar. Hence the fitted curves for the velocity ratios versus the warhead charge ratios were used as correction factors for the established formulas. Finally experiments were designed and conducted to validate the revised formulas, which shows acceptable relative errors of 2.8 % and 9.9 %, better than already existing formulas. The established formulas could be a good reference for the damage evaluation of aimable warheads and for fragment velocity distribution research.

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A numerical investigation on explosive fragmentation of metal casing using Smoothed Particle Hydrodynamic method

Cited by 88 publications

References 24 publications

Parallel Control to Fragments of a Cylindrical Structure Driven by Explosive inside

Parallel Control to Fragments of a Cylindrical Structure Driven by Explosive inside

Dynamic shear fracture of an explosively-driven metal cylindrical shell

New Formula for Fragment Velocity in the Aiming Direction of an Asymmetrically Initiated Warhead

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