天然铠甲高效防护的材料学机理

赵宁, 焦大, 朱艳坤, 刘德学, 刘增乾, 张哲峰

Material Science Mechanism for Efficient Protection of Natural Armor

ZHAO Ning, JIAO Da, ZHU Yankun, LIU Dexue, LIU Zengqian, ZHANG Zhefeng

图3 原位结构再取向效应及其强韧化机理

Fig.3 Adaptive structural reorientation and its underlying strengthening and toughening mechanism (a) the inclination of the composite structure with respect to the loading axis decreases under tension and increases under compression; (b) rotation of mineralized collagen fibrils with differing original orientations as a function of the macroscopic tissue strain during the tensile test of the Arapaima gigas fish scale[22]; (c) variations in the Young’s modulus, strength, and fracture toughness of composite with strain caused by structural reorientation during tensile deformation[40]; (d) increased resistance to local and global buckling and improved splitting toughness of composite as a result of structural reorientation during compressive deformation[40]