Fragment spatial distribution of prismatic casing under internal explosive loading

Ma, Tianbao; Shi, Xinwei; Li, Jian; Ning, Jianguo

doi:10.1016/j.dt.2019.11.006

Cited by 11 publications

(7 citation statements)

References 26 publications

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“…In numerical calculation, the state equation of ideal gas [ 33 ] is used to calculate the air material, and its expression is as follows:

where

is the air density,

is the specific internal energy of the air,

is the isentropic index of the air, and

is used in numerical calculation.…”

Section: Methodsmentioning

confidence: 99%

“…The JWL state equation [ 33 ] is adopted for detonation products generated after explosive detonation. The expression is as follows:

where

is the volume ratio of the detonation product and unexploded explosive, and

and

are undetermined constants.…”

Section: Methodsmentioning

confidence: 99%

“…The numerical simulation of large deformation does not directly influence the material. Thus, it is able to deal with the large deformation problem, but the interface between the multi-material is difficult to track, and the accuracy of tracking the material interface is not as good as that of Lagrange methods [ 33 ]. In this paper, a coupled Euler and Lagrange method, which combined the advantages of the Euler method and Lagrange methods, is adopted [ 34 ].…”

Section: Methodsmentioning

confidence: 99%

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Experimental and Numerical Study on the Mechanical Behavior of Composite Steel Structure under Explosion Load

Zheng

2021

Materials

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Most engineering structures are composed of basic components such as plates, shells, and beams, and their dynamic characteristics under explosion load determine the impact resistance of the structure. In this paper, a three-dimensional composite steel structure was designed using a beam, plate, and other basic elements to study its mechanical behavior under explosion load. Subsequently, experiments on the composite steel structure under explosion load were carried out to study its mechanical behavior, and the failure mode and deformation data of the composite steel structure were obtained, which provided important experimental data regarding the dynamic response and mechanical behavior of the composite steel structure under explosion load. Then, we independently developed a parallel program with the coupled calculation method to solve the numerical simulation of the dynamic response and failure process of the composite steel structure under explosion load. This program adopts the Euler method as a whole, and Lagrange particles are used for materials that need to be accurately tracked. The numerical calculation results are in good agreement with the experimental data, indicating that the developed parallel program can effectively deal with the large deformation problems of multi-medium materials and the numerical simulation of the complex engineering structure failures subjected to the strong impact load.

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“…In numerical calculation, the state equation of ideal gas [ 33 ] is used to calculate the air material, and its expression is as follows:

where

is the air density,

is the specific internal energy of the air,

is the isentropic index of the air, and

is used in numerical calculation.…”

Section: Methodsmentioning

confidence: 99%

“…The JWL state equation [ 33 ] is adopted for detonation products generated after explosive detonation. The expression is as follows:

where

is the volume ratio of the detonation product and unexploded explosive, and

and

are undetermined constants.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and Numerical Study on the Mechanical Behavior of Composite Steel Structure under Explosion Load

Zheng

2021

Materials

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show abstract

“…Increasing the lethality of fragmentation warhead is the most important development direction for fragmentation warhead at present. The formation process of natural fragment [1][2][3][4][5] is complicated, which consists of initiation and propagation of detonation waves, interaction between detonation waves and shells, fracture and fragmentation of shell materials, etc. There are several factors that affect the properties of fragment, mainly including shell material and structure, explosive type, initiation mode.…”

Section: Introductionmentioning

confidence: 99%

Design Methods for the Lethality of Fragmentation Warhead based on a Multi-Objective Optimization Algorithm

Liang

et al. 2022

J. Phys.: Conf. Ser.

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Fragmentation warhead is the main weapon used to damage personnel and light armored objectives, with the lethal parameters primarily consisting of the number and velocity of fragments. Increasing the lethality of fragmentation warhead is currently the most important development direction for fragmentation warhead. The formation process of natural fragment is complicated and there are several factors that affect the properties of fragment, so there are still many techniques of developing the lethality of fragmentation warhead. In this paper, our object is to focus on the optimization design for the lethality of fragmentation warhead, based on the optimal Latin hypercube test design method and the radial basis function neural network surrogate modelling, taking the number of effective fragments per unit mass and the average kinetic energy of the effective fragments as the optimization objectives, and the explosive charge, the fragment material, the overall structure and initiation method are considered, respectively. The Pareto optimal solution sets under different design variables are obtained, and the optimal matching of multiple design parameters is realized, establishing the integration design method for “explosive - material-structure” of the fragmentation warhead. The research results can provide technical support for the structural optimization design of the fragmentation warhead.

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“…Anderson et al [10] employed a time-dependent 2D finite-difference code to model the fragmenting cylinders. Ma et al [11] conducted numerical and experimental investigations into the fragment spatial distribution of a prismatic casing under internal explosive loading. The fragment velocity was not measured.…”

Section: Introductionmentioning

confidence: 99%

Blast and Fragmentation Studies of a Scaled Down Artillery Shell-Simulation and Experimental Approaches

Ahmed¹,

Malik²,

Hussain³

et al. 2021

IJM

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Blast and fragmentation of a scaled down model of standard artillery shell is investigated experimentally and numerically. Simple experimental techniques are employed in this study to measure the fragments' velocity, mass and spatial distribution. Fragments of mass ranging from tens of milligram(s) to 6.4 grams are produced with velocities ranging from 960 to 1555 m/s. The cylindrical part of the shell has larger contribution among high velocity fragments ~1369-1555m/s than the conical and rear parts due to higher charge to mass (C/M) ratio. Overpressure of 44.2psi (304.7kPa) is measured at stand-off distance of 0.550m. The numerical simulation of fragmentation is carried out using Smoothed Particle Hydrodynamics (SPH) solver available in ANSYS AUTODYN. A coupled Euler-ALE (Arbitrary Lagrangian-Eulerian) approach is used to simulate the shell blast propagation in the surrounding air. A good agreement is achieved between the simulation and experimental results. The investigation can help in the development of protective configurations against the damaging effects of blast and fragmentation.

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Fragment spatial distribution of prismatic casing under internal explosive loading

Cited by 11 publications

References 26 publications

Experimental and Numerical Study on the Mechanical Behavior of Composite Steel Structure under Explosion Load

Experimental and Numerical Study on the Mechanical Behavior of Composite Steel Structure under Explosion Load

Design Methods for the Lethality of Fragmentation Warhead based on a Multi-Objective Optimization Algorithm

Blast and Fragmentation Studies of a Scaled Down Artillery Shell-Simulation and Experimental Approaches

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