Abstract
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.
Highlights
The dynamic responses of cylindrical casing structures under lateral impact loading often affect the national defense industry
In order to further verify the rationality of the MATLAB rapid evaluation program, we designed
Based on the above research, the deforming charge width was found to affect the lateral explosive loading range on the research, the deforming charge width was found to affect the lateral explosive loading range on the casing, and the difference in the range of the load distribution inevitably leads to the difference in the casing, and the difference in the range of the load distribution inevitably leads to the difference in the deformed surface of the filled cylindrical casing
Summary
The dynamic responses of cylindrical casing structures under lateral impact loading often affect the national defense industry. Taking the deformable warhead as an example, the casing cross-section of a deformable warhead changes from circular to non-circular under the explosive loading of lateral deforming charge. Konig and Mostert [2] designed and improved the structure of the deformable warhead on the basis of previous studies, and some conventional knowledge was obtained. 49–59) reported the mechanism of deformable warheads and the obtained conclusions were enlightening. In the 1990s, Fairlie et al [4] conducted a series of numerical simulations on the deformation mechanism of deformable warheads and the scattering process of fragments using AUTODYN-3D. Compared with the conventional fragment warhead, the deformable warhead can increase the fragment density gain and fragment velocity gain on the target, thereby increasing the damage probability of the target
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