Dermal armor, such as fish scales or armadillo osteoderms, has been known to exhibit high performance and good flexibility defending against attack. The top layer of the dermal armor usually consists of a segmented hard bony layer. The soft inner layer composed of collagen fibers connects and holds the hard layer. Inspired by the dermal armor of armadillos, bioinspired protection armor is studied for impact resistance. The hexagonal scales tessellate the surface continuously and work as the hard bony layer protecting the soft inner layer from penetration. Ultra-high molecular weight polyethylene (UHMWPE) is used as the connectivity layer to support and hold the scales. To investigate the dynamic response of the bioinspired protection armor, drop weight impact tests are carried out. A finite element model is established to study the dynamic response of bioinspired protection armor. The impact process images captured by a high speed camera and the experimental data of drop hammer acceleration tests verify the validity of the numerical model. The dynamic resistance behavior and the synergy effect of each part of the bioinspired protection armor combined with the protected objects are studied in detail by numerical simulation. The results show that the bioinspired protection armor has marked energy absorption ability. A synergistic dissipation mechanism is activated in the impact process, which can dissipate impact energy and make the impact load distribution more uniform. The UHMWPE between the outer layer and the soft substrate plays a significant role not only related to support and connection, but also for the force balance and energy absorption. The mechanism of energy absorption of the bioinspired protection armor revealed in this paper can be taken as a new guideline for designing a novel protective armor.

已知诸如鱼鳞或犰狳骨质之类的皮肤装甲具有高性能和良好的柔韧性，可抵御攻击。真皮装甲的顶层通常由分段的硬骨层组成。由胶原纤维组成的柔软的内层连接并保持着坚硬的层。受犰狳真皮护甲的启发，研究了生物启发式防护装甲的抗冲击性。六边形的鳞片连续地细分曲面，并充当硬质骨质层，保护软质内层不被穿透。超高分子量聚乙烯（UHMWPE）被用作支撑和保持秤的连接层。为了研究受生物启发的防护装甲的动态响应，进行了落锤冲击测试。建立了有限元模型来研究生物启发式防护装甲的动力响应。高速相机拍摄的冲击过程图像和落锤加速度测试的实验数据验证了该数值模型的有效性。通过数值模拟，详细研究了生物启发式防护装甲与被保护物体相结合的各部分的动态阻力行为和协同效应。结果表明，生物启发性防护装甲具有显着的能量吸收能力。冲击过程中激活了一种协同耗散机制，可以耗散冲击能量，使冲击载荷分布更加均匀。外层和软质基材之间的UHMWPE不仅起着支撑和连接的作用，还起着重要的作用，而且还用于力的平衡和能量的吸收。本文揭示的生物启发式防护装甲的能量吸收机理可以作为设计新型防护装甲的新指南。