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Bounds for the dynamic modulus of unidirectional composites with bioinspired staggered distributions of platelets

机译：具有生物启发的血小板交错分布的单向复合材料动态模量的界

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摘要

Load-bearing biological materials like bone, nacre and tendon are bio-composites with superior mechanical properties to resist static and dynamic loadings and thus have been intensively studied not only for understanding the structure-property relationship but also for developing novel bioinspired materials. Here a theoretical framework was developed to establish the bounds for the storage and loss moduli of the bioinspired staggered composites. The bounds were first verified by the finite element analysis. Then, the framework was utilized to study how the storage and loss moduli of the bioinspired composites vary against a series of geometrical and constituent material parameters including the distribution, volume fraction, and aspect ratio of the mineral platelets, as well as the loading frequency. In a recursive way, the bounds were further extended for bioinspired composites with multiple levels of structural hierarchy, and the effect of structural hierarchy was investigated. The results showed that, in comparison with other structural architectures, stairwise staggering structure generally gives higher loss viscoelasticity. The bounds derived in the present paper not only add insights into the damping behaviors of load bearing biological composites but also provide a useful tool to estimate and help design the dynamic moduli of bio-inspired composites. (C) 2017 Elsevier Ltd. All rights.reserved.
机译：诸如骨，珍珠质和腱的承重生物材料是具有优异机械性能以抵抗静态和动态载荷的生物复合材料，因此，不仅为了理解结构-特性关系而且为开发新型的生物启发材料而进行了深入研究。在这里开发了一个理论框架，以建立生物启发的交错复合材料的存储和损失模量的界限。首先通过有限元分析来验证边界。然后，利用该框架研究生物启发的复合材料的储能和损耗模量如何随一系列几何和组成材料参数（包括矿物血小板的分布，体积分数和长宽比）以及加载频率而变化。以递归方式进一步扩展了具有多个层次结构层次的生物启发复合材料的边界，并研究了层次结构的影响。结果表明，与其他结构体系相比，阶梯交错结构通常具有更高的损耗粘弹性。本文得出的界限不仅增加了对承载生物复合材料的阻尼行为的了解，而且为估算和帮助设计生物启发性复合材料的动态模量提供了有用的工具。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Composite Structures》 |2017年第5期|152-165|共14页
  • 作者

    Qwamizadeh Mahan; Lin Min; Zhang Zuoqi; Zhou Kun; Zhang Yong Wei;

  • 作者单位

    Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore|ASTAR, Inst High Performance Comp, Singapore 138632, Singapore;

    Wuhan Univ, Sch Civil Engn, Wuhan 430072, Hubei, Peoples R China;

    Wuhan Univ, Sch Civil Engn, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Key Lab Geotech & Struct Engn Safety Hubei Prov, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Suzhou Res Inst, Suzhou 215123, Jiangsu, Peoples R China;

    Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore;

    ASTAR, Inst High Performance Comp, Singapore 138632, Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Viscoelasticity; Energy dissipation; Staggered architecture; Hierarchical structure;

    机译：粘弹性能量耗散交错结构分层结构;

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