Dynamic diagnosis of metamaterials through laser-induced vibrational signatures
Dynamic diagnosis of metamaterials through laser-induced vibrational signatures
复制标题
通过激光诱导振动特征对超材料进行动态诊断
DOI：
10.1038/s41586-023-06652-x
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发表时间：
2023
期刊：
影响因子：
64.8
通讯作者：
Portela, Carlos M.
中科院分区：
文献类型：
--
作者：
Kai, Yun;Dhulipala, Somayajulu;Sun, Rachel;Lem, Jet;DeLima, Washington;Pezeril, Thomas;Portela, Carlos M.
微尺度的机械超材料由于其工程构建模块而表现出奇异的静态特性，但其动态特性的研究仍然很少。它们的设计原理可以针对频率相关的特性以及高应变率变形下的弹性，使它们成为适用于轻质抗冲击、声波导或振动阻尼应用的多功能材料。然而，由于低通量和破坏性表征，或缺乏现有的测试协议，获取小尺度的动态特性仍然是一个挑战。在这里，我们演示了一种高通量、非接触式框架，该框架使用超材料内的 MHz 波传播特征来非破坏性地提取动态线性特性、全向弹性信息、阻尼特性和缺陷量化。使用微观超材料的棒状镶嵌，我们报告了在应变率接近 102s−1 时高达 94% 的方向相关和速率相关动态刚度，以及阻尼特性比其组成材料高三倍。我们还表明，振动响应中的频移可以表征超材料内的不可见缺陷，并且选择性探测可以构建实验弹性表面，而这在以前只能通过计算来实现。我们的工作为加速数据驱动的材料和微型设备发现提供了一条途径，用于动态应用，例如防护结构、医疗超声或振动隔离。
Mechanical metamaterials at the microscale exhibit exotic static properties owing to their engineered building blocks, , –, but their dynamic properties have remained substantially less explored. Their design principles can target frequency-dependent properties, –and resilience under high-strain-rate deformation,, making them versatile materials for applications in lightweight impact resistance, –, acoustic waveguiding,or vibration damping,. However, accessing dynamic properties at small scales has remained a challenge owing to low-throughput and destructive characterization,,or lack of existing testing protocols. Here we demonstrate a high-throughput, non-contact framework that uses MHz-wave-propagation signatures within a metamaterial to non-destructively extract dynamic linear properties, omnidirectional elastic information, damping properties and defect quantification. Using rod-like tessellations of microscopic metamaterials, we report up to 94% direction-dependent and rate-dependent dynamic stiffening at strain rates approaching 102s−1, as well as damping properties three times higher than their constituent materials. We also show that frequency shifts in the vibrational response allow for characterization of invisible defects within the metamaterials and that selective probing allows for the construction of experimental elastic surfaces, which were previously only possible computationally. Our work provides a route for accelerated data-driven discovery of materials and microdevices for dynamic applications such as protective structures, medical ultrasound or vibration isolation.
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DOI：
10.1073/pnas.2111505119
发表时间：
2022-01-04
影响因子：
11.1
作者：
Bastek JH;Kumar S;Telgen B;Glaesener RN;Kochmann DM
通讯作者：
Kochmann DM
DOI：
10.1073/pnas.1916817117
发表时间：
2020-03-17
影响因子：
11.1
作者：
Portela, Carlos M.;Vidyasagar, A.;Kochmann, Dennis M.
通讯作者：
Kochmann, Dennis M.
DOI：
--
发表时间：
2020
期刊：
Graduate Texts in Physics
影响因子：
--
作者：
Steven L. Garrett
通讯作者：
Steven L. Garrett
增材制造晶格材料中的原位动态压缩波行为
影响因子：
2.7
作者：
J. Lind;B. Jensen;M. Barham;Mukul Kumar
通讯作者：
Mukul Kumar
影响因子：
13.3
作者：
Izard, Anna Guell;Bauer, Jens;Valdevit, Lorenzo
通讯作者：
Valdevit, Lorenzo