“三明治”结构复合材料的超高速撞击行为

Hypervelocity Impact Behaviors of Sandwich Structural Composites

摘要:

紧凑型“三明治”结构复合材料在航空航天领域具有广泛的应用前景。本文设计了几种由软/硬材料组合而成的“三明治”结构复合材料：(TiB₂/2024＋Al)结构复合材料、((2D-M40_f)/5A06＋Al)结构复合材料、((2D-M40_f＋2D-Ti_f)/5A06)结构复合材料。利用二级轻气炮、光学显微镜(OM)、扫描电镜(SEM)等多种手段系统地研究了这几种“三明治”结构复合材料薄靶在2.5 km/s速度下,粒子直径为0.8~2.0 mm撞击时的抗高速撞击能力、靶板宏观损伤特征,并采用平均吸能性能来评价不同破坏特征的“三明治”结构复合材料的抗高速撞击能力。结果表明,几种“三明治”结构复合材料的抗高速撞击能力优于相应的单一复合材料,其最大吸能的高低顺序依次为(TiB₂/2024＋Al)结构复合材料、((2D-M40_f)/5A06＋Al)结构复合材料、((2D-M40_f＋2D-Ti_f)/5A06)结构复合材料。

Abstract:

2/2024＋Al) structure, ((2D-M40f) /5A06＋Al) structure, ((2D-M40f＋2D-Tif)/5A06) structure. The use of secondary light gas guns, optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM) and other methods to systematically study these "sandwich" structure composite thin targets at a speed of 2.5 km/s , The high-speed impact resistance and the macroscopic damage characteristics of the target plate when the particle diameter is 0.8~2.0 mm, and the average energy absorption performance is used to evaluate the high-speed impact resistance of the "sandwich" structure composites with different damage characteristics. The results show that the high-speed impact resistance of several "sandwich" composite materials is better than the corresponding composite materials, and the order of their protective performance is (TiB2/2024＋Al) structure, ((2D-M40f)/5A06＋Al) structure, (( 2D-M40f + 2D-Tif)/5A06) structure.