Penetration of SiCP/Al functionally graded plates——Experiment and numerical simulation
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摘要: 采用粉末冶金方法制备碳化硅陶瓷颗粒(SiCP)增强金属铝基复合材料板(MMCs), 并采用热压扩散法制备功能梯度装甲板(FGM)。利用高速冲击空气炮系统, 对纯铝靶板和两种不同铺层结构的功能梯度装甲靶板进行侵彻试验, 并利用LS-DYNA软件对侵彻试验过程进行数值模拟分析, 同时考察等厚、 等面密度下SiC颗粒分布对抗侵彻性能的影响。研究结果表明, 功能梯度板的抗侵彻性能比纯铝板好, 而两种不同铺层结构功能梯度板的抗侵彻性能相差不大。数值计算结果与现有试验结果取得了较好的一致, 说明了数值模拟的有效性。从数值计算结果可以看出, 层状功能梯度板比等厚、 等面密度均质复合材料靶板的抗侵彻能力好, 并可近似地认为等厚、 等面密度下多层功能梯度板的抗侵彻性能对颗粒分布不敏感。Abstract: The penetration tests of two kinds of functionally graded plates (FGM) were performed by using a high speed air-gun system. The plates consist of layered structures with two stack sequences prepared by the vacuum hot-pressure diffusion processing. Each layer is made from aluminum matrix composites reinforced by different volume fraction SiC particles (MMCs) by the vacuum hot-pressure sintering method. The numerical simulations of penetration process were carried out by LS-DYNA code. The numerical simulations were also performed to explore the optimal distribution of certain average SiCP fraction. The test results show that the anti-penetration ability of the functionally graded plate is much better than that of the pure aluminum plate. The difference of anti-penetration ability between the two tested functionally graded plates is not apparent. The numerical simulation results are in good agreement with experimental results. From the simulation results, the layered plates have superior anti-penetration ability to the that of homogeneity plate of MMCs. And the anti-penetration of layered plates with the same thickness and the same areal density can be approximately regarded as not sensitive to the particle distribution.
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Keywords:
- penetration /
- LS-DYNA /
- functionally graded plate /
- SiC particle /
- numerical simulation
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