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Engineering the Mechanics of Heterogeneous Soft Crystals

机译：工程非均质软晶体的力学

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摘要

This work demonstrates how the geometric and topological characteristics of substructures within heterogeneous materials can be employed to tailor the mechanical responses of soft crystals under large strains. The large deformation mechanical behaviors of elastomeric composites possessing long-range crystalline order are examined using both experiments on 3D-printed prototype materials and precisely matched numerical simulations. The deformation mechanisms at small and large strains are elucidated for six sets of morphologies: dispersed particles on each of the simple cubic, body-centered cubic or face-centered cubic lattices, and their bi-continuous counterparts. Comparison of results for the six types of morphologies reveals that the topological connectivity of dissimilar domains is of critical importance for tailoring the macroscopic mechanical properties and the mechanical anisotropy.
机译：这项工作演示了如何利用异质材料中子结构的几何和拓扑特征来调整大应变下软晶体的机械响应。使用在3D打印的原型材料上进行的实验以及精确匹配的数值模拟，来检验具有长程晶序的弹性体复合材料的大变形力学行为。阐明了六种形貌在大应变和大应变下的变形机理：每个简单立方，体心立方或面心立方晶格上的分散粒子，以及它们的双连续对等体。六种形态的结果比较表明，不同域的拓扑连通性对于调整宏观机械性能和机械各向异性至关重要。

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  • 来源
    《Advanced Functional Materials》 |2016年第38期|6938-6949|共12页
  • 作者

    Cho Hansohl; Weaver James C.; Poeselt Elmar; int Veld Pieter J.; Boyce Mary C.; Rutledge Gregory C.;

  • 作者单位

    MIT, Dept Chem Engn, Cambridge, MA 02139 USA;

    Harvard Univ, Wyss Inst Biol Inspired Engn, Cambridge, MA 02138 USA;

    BASF Polyurethanes GmbH, Elastogranstr 60, D-49448 Lemforde, Germany;

    BASF SE, GME MM, Carl Bosch Str 38, D-67056 Ludwigshafen, Germany;

    Columbia Univ, Fu Fdn Sch Engn & Appl Sci, New York, NY 10027 USA;

    MIT, Dept Chem Engn, Cambridge, MA 02139 USA;

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