Negative refraction in conventional and additively manufactured phononic crystals
Negative refraction in conventional and additively manufactured phononic crystals
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传统和增材制造的声子晶体中的负折射
DOI：
10.1109/ultsym.2019.8926236
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Astolfi L
中科院分区：
文献类型：
--
作者：
Astolfi L
声子晶体是一种声学超材料，旨在当声音的波长处于晶格常数的数量级时对其进行操纵。用于水中的金属声子晶体使用商业可得的不锈钢棒组装而成，平均表面粗糙度Ra=0.5±0.5μm，而激光粉床制造，一种附加制造技术，被用来生产类似的Inconel718结构，Ra=2 0±6μm。这表明激光粉床制造是实现这种声子晶体的一种很有前途的方法。
Phononic crystals are acoustic metamaterials designed to manipulate sound when its wavelength is in the order of magnitude of the crystal lattice constant. Metallic phononic crystals for use in water were assembled using commercially available stainless steel rods with an average superficial roughness Ra=0.5±0.5 μm, while Laser Powder Bed Fabrication, an additive manufacturing technique, was employed to produce similar Inconel 718 structures with Ra=20±6 μm. Experiments in the 150 - 500 kHz frequency range indicated that acoustic band gaps and negative refraction were present in both cases, with similar features. This indicates that Laser Powder Bed Fabrication is a promising method for realising such phononic crystals.
DOI：
--
发表时间：
1996
期刊：
影响因子：
--
作者：
D. Thompson
通讯作者：
D. Thompson
DOI：
10.1109/tuffc.2016.2543527
发表时间：
2016-05-01
影响因子：
3.6
作者：
Lucklum, Frieder;Vellekoop, Michael J.
通讯作者：
Vellekoop, Michael J.