研究了钢板一纤维增强复合材料板一钢板构成的三明治结构对破片的防护性能。通过破片模拟弹丸（FSP）高速撞击不同结构三明治板实验，获得FSP弹丸贯穿16种三明治板的弹道极限，分析结构特征对纤维增强复合材料三明治板比吸收能的影响。结果表明，叠层芳纶、玻纤基三明治板较单层结构三明治板比吸收能分别提高了8．31％和16．09％，8mm面板＋8mm夹层＋6mm背板芳纶、玻纤基三明治板较4mm面板＋8mm夹层＋10mm背板的芳纶、玻纤基三明治板比吸收能分别提高了37．72％和25．35％；芳纶、玻纤基三明治板的比吸收能均随复合材料夹层厚度的增加呈指数递增，夹层基板的抗拉性能是影响三明治板比吸收能的重要因素；同面密度下，厚面板、薄背板及多层叠合夹层结构的三明治板具有更高的比吸收能。%The defense performance of sandwich structure of steel plate - fiber composite material plate - steel plate structure against fragment was investigated. By the experiment on the fragment simulation projectile （FSP）, impacted to different kinds of sandwich plate with high velocity, the ballistic limits of fragment pierced 16 kinds of sandwich plates were obtained, and the influence of structure characteristic on the speeifie energy absorption of the sandwich plate was analyzed. The results show that the specific energy absorption of laminated sandwich structure on aramid and glass fiber is 8. 31% and 16.09% higher than that of a single-layer structure, respectively. The specific energy absorption of the sandwich structure with 8 mm front＋ 8mm core＋ 6 mm back on aramid and glass fiber is 37.72% and 25. 35% higher than the one with 4 mm frontq-8 mm core＋10 mm back, respectively. The speeific energy absorption of sandwich plate exponentially increases with the thickness of fiber composite sandwich. The tensile properties of middle layer plate is an important factor on the specific energy absorption of the sandwich plate. At the same areal density, the specific energy absorption of the sandwich plate can be significantly improved by adopting thicker faceplate, thinner backboard and laminated structure for middle layer.
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