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Impact behavior of negative stiffness honeycomb materials

机译：负刚度蜂窝材料的冲击性能

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摘要

Negative stiffness honeycombs are architected metamaterials that utilize elastic buckling to absorb mechanical energy. Relative to conventional honeycomb materials, they offer several advantages, including the ability to recover their initial configuration and offer consistently repeatable mechanical energy absorption. In this paper, fully recoverable negative stiffness honeycombs are fabricated from thermoplastic and metallic parent materials. The honeycombs are subjected to quasistatic and impact loading to demonstrate the predictability and repeatability of their energy absorption characteristics across a variety of loading conditions. Results indicate that these honeycombs offer nearly ideal shock isolation by thresholding the acceleration of an isolated mass at a predetermined level and that this thresholding behavior is highly repeatable as long as the magnitude of the mechanical energy imparted to the system does not exceed the energy absorption capacity of the honeycomb.
机译：刚度为负值的蜂窝是利用弹性屈曲吸收机械能的结构化超材料。相对于常规蜂窝材料，它们具有多个优点，包括能够恢复其初始配置并始终如一地可重复吸收机械能。在本文中，完全可恢复的负刚度蜂窝是由热塑性和金属母体材料制成的。蜂窝承受准静态和冲击载荷，以证明其在各种载荷条件下能量吸收特性的可预测性和可重复性。结果表明，通过将隔离质量的加速度限制在预定水平上，这些蜂窝可提供近乎理想的隔振效果，并且只要施加给系统的机械能的大小不超过能量吸收能力，此阈值行为就可以高度重复。的蜂窝。

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  • 来源
    《Journal of Materials Research》 |2018年第3期|290-299|共10页
  • 作者

    Debeau David A.; Seepersad Carolyn C.; Haberman Michael R.;

  • 作者单位

    Univ Texas Austin, Mech Engn Dept, Austin, TX 78712 USA;

    Univ Texas Austin, Mech Engn Dept, Austin, TX 78712 USA;

    Univ Texas Austin, Mech Engn Dept, Austin, TX 78712 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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