Architected materials for tailorable shear behavior with energy dissipation
Architected materials for tailorable shear behavior with energy dissipation
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DOI：
10.1016/j.eml.2019.01.010
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发表时间：
2019-04-01
影响因子：
4.7
通讯作者：
Burgueno, Rigoberto
中科院分区：
文献类型：
--
作者：
Liu, Suihan;Azad, Ali Imani;Burgueno, Rigoberto
提出了一种具有可剪裁剪切性能和高耗能的建筑材料。具有弹性突跳不稳定性的斜梁定义了所提出的材料的微观结构，其显示将应变能转换为动态运动的闪烁现象，导致与速率无关的能量耗散。在半周期和全周期剪切变形条件下使用3D打印原型对设计概念进行了实验验证，并显示出在弹性状态下具有大能量耗散的速率无关顺序跳变。数值模拟和分析表明，可预测的材料行为和可调的剪切性能，可以通过设计的微结构的几何形状。所提出的材料填补了剪切变形下的能量耗散的需要，在一个可恢复的和率无关的方式。(C)2019爱思唯尔有限公司版权所有。
A class of architected materials is proposed for tailorable shear behavior and high energy dissipation. Inclined beams with elastic snap-through instabilities define the microstructure of the proposed materials, which display a twinkling' phenomenon that converts strain energy to dynamic motions, resulting in rate-independent energy dissipation. The design concepts were experimentally validated using 3D printed prototypes under both half- and full-cycle shear deformation conditions, and shown to respond in rate-independent sequential snap-through transitions with large energy dissipation in the elastic regime. Numerical simulations and analytical analyses show that predictable material behavior and tunable shear properties can be designed through the microstructure's geometry. The proposed materials fill the need of dissipating energy under shear deformations in a recoverable and rate-independent manner. (C) 2019 Elsevier Ltd. All rights reserved.