PDF(Pubmed)
Abstract：
A composite structure containing a metallic skeleton and polyurea elastomer interpenetrating phase was fabricated, and its anti-penetration performance for low-velocity large mass fragments was experimentally studied. The protection capacity of three polyurea was compared based on the penetration resistance force measurement. Results show that the polyurea coating layer at the backside improves the performance of the polyurea-filled spherical cell porous aluminum (SCPA) plate due to its backside support effect and phase transition effect, which are accompanied by a large amount of energy absorption. The frontal-side-coated polyurea layer failed to shear and provided a very limited strengthening effect on the penetration resistance of the interpenetrating phase composite panel. The filling polyurea in SCPA increased the damage area and formed a compression cone for the backside coating layer, leading to a significant stress diffusion effect. The anti-penetration performance was synergistically improved by the plug block effect of the interpenetrating phase composite and the backside support effect of the PU coating layer. Compared with SCPA, the initial impact failure strength and the average resistance force of the composite plate were improved by 120-200% and 108-274%, respectively.
摘要：
制备了包含金属骨架和聚脲弹性体互穿相的复合结构，实验研究了其对低速大质量碎片的抗侵彻性能。基于穿透阻力测量，比较了三种聚脲的保护能力。结果表明，由于其背面支撑效应和相变效应，背面的聚脲涂层提高了聚脲填充的球形孔多孔铝（SCPA）板的性能，伴随着大量的能量吸收。正面涂覆的聚脲层无法剪切，并且对互穿相复合板的抗穿透性具有非常有限的增强作用。SCPA中的填充聚脲增加了损伤面积，并形成了背面涂层的压缩锥，导致显著的应力扩散效应。互穿相复合材料的堵块效应和PU涂层的背面支撑效应协同提高了抗渗透性能。与SCPA相比，复合材料板的初始冲击破坏强度和平均阻力分别提高了120-200%和108-274%,分别。
