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首页> 外文期刊>Journal of the mechanical behavior of biomedical materials >Effect of chemical composition and microstructure on the mechanical behavior of fish scales from Megalops Atlanticus
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Effect of chemical composition and microstructure on the mechanical behavior of fish scales from Megalops Atlanticus

机译：化学成分和微观结构对大西洋巨鳞鱼类鱼鳞力学行为的影响

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摘要

This paper presents an experimental study of the composition, microstructure and mechanical behavior of scales from the Megalops Atlanticus (Atlantic tarpon). The microstructure and composition were evaluated by Scanning Electron Microscopy (SEM) and RAMAN spectroscopy, respectively. The mechanical properties were evaluated in uniaxial tension as a function of position along the length of the fish (head, mid-length and tail). Results showed that the scales are composed of collagen and hydroxyapatite, and these constituents are distributed within three well-defined layers from the bottom to the top of the scale. The proportion of these layers with respect to the total scale thickness varies radially. The collagen fibers are arranged in plies with different orientations and with preferred orientation in the longitudinal direction of the fish. Results from the tensile tests showed that scales from Megalops Atlanticus exhibit variations in the elastic modulus as a function of body position. Additional testing performed with and without the highly mineralized top layers of the scale revealed that the mechanical behavior is anisotropic and that the highest strength was exhibited along the fish length. Furthermore, removing the top mineralized layers resulted in an increase in the tensile strength of the scale. (C) 2015 Elsevier Ltd. All rights reserved.
机译：本文提出了对大西洋巨眼鲸（Atlantic tarpon）鳞片的组成，微结构和力学行为的实验研究。显微结构和组成分别通过扫描电子显微镜（SEM）和拉曼光谱进行评估。沿鱼的长度（头，中长度和尾巴），以单轴张力作为位置的函数来评估机械性能。结果表明，鳞片由胶原蛋白和羟基磷灰石组成，并且这些成分从鳞片的底部到顶部分布在三个清晰的层中。这些层相对于总标尺厚度的比例在径向上变化。胶原纤维以鱼的纵向方向上具有不同取向和优选取向的层布置。拉伸试验的结果表明，Megalops Atlanticus的鳞片显示出弹性模量随身体位置的变化。在有或没有鳞片的高度矿化顶层的情况下进行的其他测试表明，机械性能是各向异性的，并且沿着鱼的长度显示出最高的强度。此外，去除顶部的矿化层导致水垢的拉伸强度增加。 （C）2015 Elsevier Ltd.保留所有权利。

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