Penetration Models of Ceramic Composite Target
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摘要: 为了研究陶瓷复合靶的抗侵彻性能，在陶瓷的空腔膨胀理论中，提出了一个表征陶瓷损伤的损伤因子。基于考虑损伤的陶瓷空腔膨胀理论和金属空腔膨胀理论，并忽略靶板侧向边界的影响，根据陶瓷材料和金属材料的特点，按照弹-靶交界面处材料的不同应力状态，分4种情况进行了讨论。分别求得了4种分区下的陶瓷靶板的抗侵彻阻力，分析了影响陶瓷靶板抗侵彻阻力的材料性质。结果表明:(1)在陶瓷靶板的材料参数中，陶瓷失效后的压剪系数对靶板阻力的影响较大，而抗拉强度和抗压强度对靶板阻力的影响较小；(2)当陶瓷靶板近似为一个无限大的靶板时，其裂纹区的相对尺寸及空腔膨胀压力是一个常数。Abstract: In order to study the penetration ability of the ceramic composite target, a damage factor is proposed to characterize the radial damage of the material in the cracked zone in the cavity expansion theory (CET).Based on the CET of ceramic with damage factor and the CET of metal, the composite target composed of a ceramic tile and a semi-infinite metallic substrate is theoretically modeled.In this model, the effects of the finite lateral boundary are ignored by assuming that the lateral dimension is infinite.Depending on the property of the penetrator-target interface to the ceramic-metal interface, 4 distinct possibilities arise.The stress state and target resistance of each possibility are calculated respectively.The conclusion shows that:(1) the pressure-shear coefficient in the comminuted zone has an obvious effect on the penetration property of the ceramic, while the tensile strength and compressive strength have a little effect on it; (2) when the composite target is approximated as an infinite target, the relative size of different zones and the cavity expansion pressure are not affected.
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Key words:
- ceramic /
- composite target /
- penetration /
- cavity expansion theory /
- damage
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图 2 空腔区-粉碎区-裂纹区-弹性区-弹性区(金属)
Figure 2. Cavity-comminuted-cracked-elastic-elastic (metal)
图 4 空腔区-粉碎区-裂纹区-塑性区(金属)-弹性区(金属)
Figure 4. Cavity-comminuted-cracked-plastic (metal)-elastic (metal)
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