论文标题
Prestrain诱导的带隙调谐在3D打印的张力启发的晶格结构中
Prestrain-induced bandgap tuning in 3D-printed tensegrity-inspired lattice structures
论文作者
论文摘要
在这封信中，我们提供了带隙可调性的实验证据，并在添加性张力式启发的晶格结构中提供了全球式序列。这些晶格非常轻巧，旨在表现出一种非线性压缩反应，以模仿紧张的结构。我们用僵硬的聚合物制造它们，但是由于它们的特殊设计，它们是合规的，并且保持弹性至高水平的预压。反过来，与软聚合物制成的可调节的超材料不同，我们的晶格的响应不是由阻尼主导。我们对一维晶格进行实验，受到纵向波激发和不同水平的静态纵向预压，并观察到波速以及最低频率带的位置和宽度的连续调整。
In this letter, we provide experimental evidence of bandgap tunability with global prestrain in additively-manufactured tensegrity-inspired lattice structures. These lattices are extremely lightweight and designed to exhibit a nonlinear compressive response that mimics that of a tensegrity structure. We fabricate them out of a stiff polymer but, owing to their peculiar design, they are compliant and remain elastic up to high levels of precompression. In turn, unlike tunable metamaterials made of soft polymers, the response of our lattices is not dominated by damping. We perform experiments on a one-dimensional lattice subject to longitudinal wave excitation and varying levels of static longitudinal precompression, and observe continuous tuning of both the wave speed and the location and width of the lowest-frequency bandgap.
