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本文用流体动力学和弹塑性状态解决材料流变问题的二维、多种材料、欧拉有限差分程序研究了多种材料所制动能弹的侵彻性能。所研究的这个弹是一种带有不同材料作被甲的尖圆锥形钢心穿甲弹。本文对高密度与低密度的被甲材料均进行了分析。高密度被甲材料的潜在优点是:提高了截面密度,降低了径向流交和阻止了弹头的变形,这一切均导致穿透能力增加。另一方面低密度材料则可有效地吸收大部分初始冲击能,并减少弹丸心部传递的应力值。 对于未加被甲的钢弹头以及用钨合金和铝作被甲的弹头进行了计算。从穿甲深度、弹头变形、靶孔尺寸、塑性交形功、能量和动量转移以及其它因素综合考虑,可以得出这样的结论,即对于厚靶来说,任何材料的被甲对弹的性能影响很小,或者没有影响。但对于相当薄的靶来说,被甲的材料及几何形状会显著提高穿甲性能,并明显延迟弹头变形。文中对用多种材料作穿甲弹的设计根据也进行了讨论。
In this paper, the fluid dynamics and elastoplastic state of the two-dimensional and multi-material materials are used to solve the rheological problems of materials. The Euler finite difference program is used to study the penetration performance of the braking energy shells of various materials. The bomb studied was a pointed conical steel core armor with different materials. In this paper, both high density and low density are analyzed. The potential advantages of a high density armor material are: Increased cross section density, reduced radial flow, and warhead warhead deformation, all leading to increased penetration. On the other hand, low-density materials can effectively absorb most of the initial impact energy and reduce the stress transmitted through the heart of the projectile. Calculations were carried out for the steel warheads without armor and warheads made of tungsten alloy and aluminum. From the perspective of piercing depth, warhead deformation, target hole size, plasticity work, energy and momentum transfer, and other factors, it can be concluded that for a thick target, the performance of a shell versus shell for any material Little effect, or no effect. However, for a relatively thin target, armor material and geometry significantly improve armor piercing performance and significantly delay warhead deformation. The paper also discusses the design basis of using a variety of materials as armor-piercing bullets.