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首页> 外文期刊>Journal of Materials Research >Deconvolution of the elastic properties of bivalve shell nanocomposites from direct measurement and finite element analysis
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Deconvolution of the elastic properties of bivalve shell nanocomposites from direct measurement and finite element analysis

机译：直接测量和有限元分析对双壳壳纳米复合材料弹性性能的反卷积

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摘要

A new protocol has been devised for determining elastic properties of natural biocomposites in the form of bivalve shells under wet and dry conditions. Four-point bending on shell slices of Mytilus edulis, Ensis siliqua, and Pecten maximus give generally lower and more reliable values of Young's modulus, E, than those in the literature from three-point bending, due to the more even distribution of strain. Finite element analysis of the prismatic microstructure of Pinna nobilis, obtained by X-ray tomography, shows that values of E approximate to 20 GPa can be understood in terms of the real microstructure containing a small proportion of organic matrix phase with E approximate to 1 GPa and a dominant proportion of calcite with E approximate to 90 GPa. Higher values of E obtained by nanoindentation give results which are biased toward the properties of the carbonate phase rather than of the biocomposite as a whole.
机译：已经设计出一种新的方案来确定在湿和干条件下双壳壳形式的天然生物复合材料的弹性性能。与三点弯曲的文献相比，由于应变的分布更均匀，因此，对Mytilus edulis，Ensis siliqua和Pecten maximus的壳切片进行四点弯曲通常比文献中的三点弯曲具有更低的，更可靠的杨氏模量E。通过X射线断层扫描获得的Pinna nobilis棱柱形微结构的有限元分析表明，可以从包含少量有机基体相且E约为1 GPa的真实微结构的角度来理解E值约为20 GPa。和方解石的主要部分，E约为90 GPa。通过纳米压痕获得的较高的E值给出的结果偏向于碳酸盐相的性质，而不是整个生物复合物的性质。

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