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Three-Dimensional Printing of Elastomeric, Cellular Architectures with Negative Stiffness

机译:负刚度的弹性体,蜂窝结构的三维打印

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摘要

Three-dimensional printing of viscoelastic inks to create porous, elastomeric architectures with mechanical properties governed by the ordered arrangement of their sub-millimeter struts is reported. Two layouts are patterned, one resembling a "simple cubic" (SC)-like structure and another akin to a "face-centered tetragonal" (FCT) configuration. These structures exhibit markedly distinct load response with directionally dependent behavior, including negative stiffness. More broadly, these findings suggest the ability to independently tailor mechanical response in cellular solids via micro-archi-tected design. Such ordered materials may one day replace random foams in mechanical energy absorption applications.
机译:据报道,对粘弹性油墨进行了三维打印,以创建多孔的弹性体结构,其机械性能受其亚毫米支杆的有序排列支配。图案化了两种布局,一种类似于“简单立方”(SC)结构,另一种类似于“面心四角形”(FCT)配置。这些结构表现出明显不同的载荷响应,并具有与方向有关的行为,包括负刚度。从更广泛的角度来看,这些发现表明,通过微体系设计可以独立调整细胞固体中的机械响应。这种有序材料有一天可能会在机械能吸收应用中替代无规泡沫。

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  • 来源
    《Advanced Functional Materials》 |2014年第31期|4905-4913|共9页
  • 作者单位

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

    Lawrence Livermore National Laboratory 7000 East Avenue, Livermore, CA 94551, USA;

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