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4 多级“缝合”界面及其强韧化机理

Fig.4 Hierarchical suture interfaces and its interfacial toughening mechanisms (a) typical suture interfaces in leatherback turtle carapace [23], alligator osteoderm[24] and boxfish scute[26]; (b) dependence of the ratio between the effective stress-intensity driving forces for crack deflection and penetration with the angle of crack inclination with respect to the interface. The two cracking modes are illustrated in the insets[46]; (c) effects of structural hierarchy on the cracking resistance of suture interfaces[46]; (d) schematic illustrations about the interfacial toughening effect of suture interface compared to straight interface[46]