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Effect of chemical composition and microstructure on the mechanical properties of fish scales from Megalops Atlanticus

机译：化学成分和微观结构对大西洋巨鳞鱼鳞力学性能的影响

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摘要

Fishes use their scales as a protection against external threats like environmental hazards and predators -- This work presents an experimental study of the microstructure, composition and mechanical properties of Megalops Atlanticus (Atlantic tarpon) scales -- Mechanical properties were evaluated in uniaxial tension as a function of position along the length of the fish (head, mid-length and tail) -- Additional tensile tests were performed in three different orientations (0°,45°, and 90°) to evaluate the anisotropic behavior of the scales -- Examination of fish scale microstructure and compositions were performed by using Scanning Electron Microscopy (SEM) and RAMAN spectroscopy -- The results showed that scales from Megalops Atlantiticus are anisotropic, with variations of mechanical properties as a function of body position -- Megalops Atlantiticus scales display a characteristic hierarchical structure composed of fibrous collagen layered structures and hydroxyapatite crystals that provide multifunctional characteristics,showing to have a non-homogenous distribution within the scale
机译：鱼类将其鳞片用作保护免受外界威胁（如环境危害和掠食性动物）的侵害-这项工作是对Megalops Atlanticus（Atlantic tarpon）鳞片的微观结构，组成和力学性能的实验研究-在单轴张力下评估了机械性能沿鱼的长度（头，中长度和尾巴）位置的功能-在三个不同的方向（0°，45°和90°）上进行了附加拉伸测试，以评估鱼鳞的各向异性行为-使用扫描电子显微镜（SEM）和拉曼光谱对鱼鳞的微观结构和成分进行检查-结果表明，Megalops Atlantiticus的鳞片是各向异性的，其机械性能随身体位置而变化-Megalops Atlantiticus鳞片显示由纤维状胶原层状结构和羟基磷灰石晶体组成的特征性分层结构，提供多功能特性，显示在秤内分布不均匀

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    Gil Durán Santiago;

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