The microstructure, chemical composition and mechanical strength of heterogeneous materials of mantis shrimp (Oratosquilla oratoria) saddle were studied. As the key component of the striking system, the saddle comprised two distinct layers including outer layer and inner layer. The outer layer contained blocky microtubules and exhibited compact appearance. The inner layer presented a typical periodic lamellar structure. Due to the change of the thickness of the mineralized outer layer, the organic multilamellar structure became the foundation and enhanced the connection strength (4.55 MPa) at the connect regions between the saddle and merus exoskeleton and membrane, respectively. In the process of fracture, the lamellar structure dispersed the stress effectively by the change of the crack deflection direction and the microfibrils ordered arrangement. The exploration of mantis shrimp saddle region is beneficial to understand the striking system and provided the possibility for the stable connection of heterogeneous materials in engineering fields. The microstructure, heterogeneous material connection characteristics and high mechanical strength of saddle provide bionic models for the preparation of fiber-reinforced resin composites and soft composites.

中文翻译：

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Oratosquilla oratoria mantis虾鞍异质材料耦合连接特性及机械强度研究

研究了螳螂虾（Oratosquilla oratoria）鞍的异质材料的微观结构、化学成分和机械强度。作为打击系统的关键部件，鞍座由两个不同的层组成，包括外层和内层。外层含有块状微管并表现出致密的外观。内层呈现典型的周期性层状结构。由于矿化外层厚度的变化，有机多层结构成为基础，提高了马鞍外骨骼和膜之间连接区域的连接强度（4.55 MPa）。在断裂过程中，层状结构通过裂纹偏转方向的改变和微纤维的有序排列有效地分散了应力。对螳螂虾鞍区的探索有利于了解打击系统，为工程领域异质材料的稳定连接提供了可能。鞍座的微观结构、异质材料连接特性和高机械强度为制备纤维增强树脂复合材料和软质复合材料提供了仿生模型。