Tuning protecto‐flexibility in nature: Case of the fish scale

Fish scales are among the structural materials in nature that inspiring design and development of “next-generation” engineering materials. possess a mineralization gradient divides their thickness into three unique regions, each containing characteristic structures properties. Here, experiments complementary numerical modeling performed to understand importance different geometrical mechanical parameters affecting behavior fish scales. Numerical results showed stiffness work fracture flexure dependent on amplitude wavelength limiting layer profile. Furthermore, response bending can be effectively tuned by suture profile location within thickness. These highlight opportunity tailor flexible composite laminates through architecture layers interfaces control protecto-flexibility. Key Points This combines disciplines biology, science identify key contributions microstructure inherent protecto-flexibility scales, class natural dermal armor. The interdisciplinary approach enables an identification how adjusts specific morphological modulate both flexiblity protection from physical threats.