Biomimetic staggered composites with highly enhanced energy dissipation: Modeling, 3D printing, and testing
Biomimetic staggered composites with highly enhanced energy dissipation: Modeling, 3D printing, and testing
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DOI：
10.1016/j.jmps.2015.06.015
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发表时间：
2015-02
影响因子：
5.3
通讯作者：
Pu Zhang;M. Heyne;A. To
中科院分区：
文献类型：
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作者：
Pu Zhang;M. Heyne;A. To
我们通过设计、建模和实验相结合的方法研究了一类仿生交错复合材料的阻尼增强。通过模拟骨和珍珠的结构，设计了三种交错复合材料。这些复合材料设计是通过3D打印刚性塑料和粘性弹性体同时实现的。实验结果和理论预测表明，所设计的复合材料的能量耗散大大增强。所设计的聚合物复合材料的损失模量高达~500 MPa，高于大多数现有聚合物。此外，它们的比损耗模量（高达0.43 km2/s2）是阻尼材料中最高的。阻尼增强主要是由于粘性软基体的剪切变形较大和刚性夹杂物相的强化作用较大。
We investigate the damping enhancement in a class of biomimetic staggered composites via a combination of design, modeling, and experiment. In total, three kinds of staggered composites are designed by mimicking the structure of bone and nacre. These composite designs are realized by 3D printing a rigid plastic and a viscous elastomer simultaneously. Greatly-enhanced energy dissipation in the designed composites is observed from both the experimental results and theoretical prediction. The designed polymer composites have loss modulus up to ~500 MPa, higher than most of the existing polymers. In addition, their specific loss modulus (up to 0.43 km2/s2) is among the highest of damping materials. The damping enhancement is attributed to the large shear deformation of the viscous soft matrix and the large strengthening effect from the rigid inclusion phase.