Response of impulsively loaded cylindrical shells

Gefken, Paul R.; Kirkpatrick, Steven W.; Holmes, Bayard S.

doi:10.1016/0734-743x(88)90027-9

Cited by 13 publications

(9 citation statements)

References 3 publications

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“…2, it can also be found that ~0 is greater than li0, this means that the radial displacement is greater than axial displacement when the shell is subjected to cosine pressure impulse. This conclusion corresponds with the experimental results in [2]. is necessary to illustrate the reason that, when n takes different values, hr., hit, hs., k4.…”

Section: Examples and Results Analysismentioning

confidence: 94%

Elastic pulse buckling of cylindrical shells under radial impulsive loading

et al. 1996

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When a cylindrical shell is subjected to dynamic implusive loading in radial direction and the ratio of rqdius-to-thickness exceeds a special value, the cylindrical shell will produce elastic dynamic buckling. This paper which is based on the results of some" relative experiments, assumes deformation mode and utilizes Lagrange method to analyse the elastic pluse buckling of a thin cylindrical shell with a finite length under a cosine impulse. The dynamic buckling equations are derived and solved by numerical method. The results of calculatiott are compared with some relative calculation results which were obtained by other authors.

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Section: Examples and Results Analysismentioning

confidence: 94%

Elastic pulse buckling of cylindrical shells under radial impulsive loading

et al. 1996

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“…Lindberg et al [6] studied the transition relationships between the asymmetric load and symmetric load for the thick-and thin-walled casing structure. Gefken et al [7] performed some buckling tests on the short cylindrical casing clamped at both ends under cosine impact loading, and the conclusion was verified by Kirkpatrick [8] using DYNA-3D. Yakupov [9,10] studied the deformation of free cylindrical casings under the action of plane and spherical waves, and the typical plastic hinge theory was applied to analyze the deformation process.…”

Section: Introductionmentioning

confidence: 98%

“…Neilson et al [18] analyzed the relationships between the critical penetration speed and internal pressure, based on impact tests on filled steel tubes. Gefken et al [7] studied the dynamic response of free cylindrical shells under lateral impulsive loading, and the effect of internal pressure on the deformation of cylindrical shells was obtained. Li et al [19] established the theoretical analysis model of metal cylindrical casing filled with liquid under lateral plane impact loading.…”

Section: Introductionmentioning

confidence: 99%

Rapid Evaluation and Analysis of the Deformation of Filled Cylindrical Casing with Deforming Charge Width Based on Self-Compiled MATLAB Program

Lee

et al. 2018

Symmetry

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The casing of deformable warheads warps under the action of deforming charges. The deformation profiles may be concave-, convex-, or D-shaped, but they are all symmetrical. The D-shape is considered the optimal deformation profile. The width of the deformed surface affects the number of fragments in the target area. In order to evaluate the deformable surface width of the cylindrical casing, a criterion α was established and its optimum range was determined as 20 to 30%. Based on our previous theoretical analysis, a MATLAB program that can rapidly evaluate the projectile deformation surface was compiled, which was verified using LS-DYNA and experiments. The laws influencing the deforming charge width on the deformed surface of the filled cylindrical casing were also studied using the MATLAB rapid evaluation program. As the deforming charge width increased, the deformation profile of the casing gradually transferred from “inner-concave” to the “outer-convex”. In addition, a formula that can better reflect the relationship between the deforming charge width φ and the criterion value α was fitted and verified. The conclusions obtained in this paper provide rapid guidance for the structural design of deformable warheads.

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“…Yakupov [2,3] studied the dynamic response of the cylindrical shell subjected to a planar plastic shock wave with rigid plastic hinge theory and presented the residual deformation of the cylindrical shell as a function of a planar wave pressure. Gefken et al [4] extended the earlier analysis by Lindberg and Florence to one-side inward radial pressure that varied as the cosine of the angular position around the shell and was uniform along length, to identify the structural response modes of thin cylindrical shell, with and without internal pressure, subjected to external radial impulsive loads. For unpressurized shells the response modes consisted of dynamic pulse buckling followed by large inward deflections of the loaded surface.…”

Section: Introductionmentioning

confidence: 99%

An Analytical Approach for Deformation Shapes of a Cylindrical Shell with Internal Medium Subjected to Lateral Contact Explosive Loading

Liang

2015

Mathematical Problems in Engineering

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An experimental investigation on deformation shape of a cylindrical shell with internal medium subjected to lateral contact explosion was carried out briefly. Deformation shapes at different covered width of lateral explosive were recovered experimentally. Based on the experimental results, a corresponding analytical approach has been undertaken with rigid plastic hinge theory. In the analytical model, the cylindrical shell is divided into end-to-end rigid square bars. Deformation process of the cylindrical shell is described by using the translations and rotations of all rigid square bars. Expressions of the spring force, buckling moment, and deflection angle between adjacent rigid square bars are conducted theoretically. Given the structure parameters of the cylinder and the type of the lateral explosive charge, deformation processes and shapes are reported and discussed using the analytical approach. A good agreement has been obtained between calculated and experimental results, and thus the analytical approach can be considered as a valuable tool in understanding the deformation mechanism and predicting the deformation shapes of the cylindrical shell with internal medium subjected to lateral contact explosion. Finally, parametric studies are carried out to analyze the effects of deformation shape, including the covered width of the lateral explosive, explosive charge material, and distribution of initial velocity.

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Response of impulsively loaded cylindrical shells

Cited by 13 publications

References 3 publications

Elastic pulse buckling of cylindrical shells under radial impulsive loading

Elastic pulse buckling of cylindrical shells under radial impulsive loading

Rapid Evaluation and Analysis of the Deformation of Filled Cylindrical Casing with Deforming Charge Width Based on Self-Compiled MATLAB Program

An Analytical Approach for Deformation Shapes of a Cylindrical Shell with Internal Medium Subjected to Lateral Contact Explosive Loading

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