船用多孔材料夹层板冲击动态响应实验研究（英文）

Experimental Investigation on Dynamic Behavior of Porous Material Sandwich Plates for Lightweight Ship

多孔材料夹层结构具有优越的力学性能,可用于设计船舶防护结构,以提高船体结构的抗爆抗冲击性能。文章利用INSTRON 9350冲击试验机对泡沫铝夹层板和轻木夹层板进行了动态冲击实验,分析了在不同能量冲击作用下以上两种多孔材料夹层板的冲击响应特点,并将两种夹层板的抗冲击性能进行了对比。结果表明,在冲击载荷作用下,泡沫铝夹层板的冲击力峰值大于轻木,而其最终挠度小于轻木;泡沫铝夹层板上下面板与芯层之间没有出现脱层现象,而轻木夹层板出现了脱层现象,并且轻木芯层出现断裂失效;泡沫铝夹层板的塑性吸能率大于轻木,其能量吸收性能比轻木夹层板好,即泡沫铝夹层板的抗冲击性能优于轻木。文中的研究成果可以为船舶结构的抗冲击设计提供技术支撑。

Due to the excellent mechanical performance,the porous material sandwich structures have potential applications in the design of protective devices,which can improve the impact resistance of ship structures.In this paper,the dynamic behaviors of porous material sandwich plates under impact loadings were investigated experimentally by INSTRON 9350 Drop Tower,and the impact resistance of Aluminum Foam Sandwich Plate(AFSP)and Balsa Wood Sandwich Plate(BWSP)was analyzed and compared.The results show that when suffering from impact loadings,the peak impact force of AFSP was larger than that of BWSP.On the contrary,the permanent deflection of AFSP was smaller than that of BWSP.Meanwhile,no delamination was observed for AFSP,while the delamination between the face sheet and the core was obvious for BWPS.In addition,the plastic energy absorption ratio of AFSP was larger than that of BWSP,indicating the impact resistance of AFSP is better than that of BWSP.This paper can provide technical supports for the anti-impact design of ship structures.