CAREER: Reconfigurable Dynamic Metamaterials Interacting with Flowing Fluids

职业：可重构动态超材料与流动流体相互作用

• 批准号: 2239841
• 负责人: Eleonora Tubaldi
• 金额: $ 70.22万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-07-01 至 2028-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2239841&HistoricalAwards=false
• 关键词: CAREER; Reconfigurable; Dynamic; Metamaterials; Interacting

The ability to engineer reconfigurable metamaterials that efficiently interact with flowing fluids can revolutionize the design and operation of a wide range of medical and robotic devices, from self-reconfigurable cardiovascular prostheses, to passively controlled soft valves and deformable soft robots. These devices often operate in high-energy content environments, with unsteady flowing fluids, but no technology exists to enable them to harvest and redirect this energy to perform distributed actuation efficiently and autonomously, without relying on external sources of energy. A compelling paradigm for achieving such vision is to use multistable metamaterials that store and selectively release energy through nonlinear transition waves -- these large amplitude waves sequentially switch elements from one stable state to another. This Faculty Early Career Development (CAREER) grant will support research to build the analytical and experimental foundations for flow-responsive multistable metamaterials that manifest tunable dynamic properties and perform desirable tasks by harnessing fluid-structure interactions. These metamaterials will form building blocks for designing dynamic systems that sustain targeted functionalities under fluidic stimuli. This CAREER project will carry out an ambitious plan for integrating research and education and for developing innovative strategies for public outreach that showcase the societal benefits of the field of dynamic metamaterials and spark interest among high school students. By combining mechanical metamaterials and fluid flow environments, this research will show how fluid-structure interactions and transition waves can be leveraged to efficiently achieve desired dynamic behaviors in both dynamic systems and flow fields. With a combination of analytical, numerical, and experimental methods, fluid-metastructure interactions will be used as a twofold “dynamic knob” to (1) manipulate shape reconfigurations in multistable metamaterials for actuation purposes and to (2) control fluid fluxes through transition wavefronts in metamaterials. Reprogrammable dynamic properties and self-regulating flow capabilities will be coupled to passively obtain rigidity on demand and distributed actuation. This research will represent a milestone towards the development of future engineered structures with unprecedented tunable dynamic properties and flow-induced shape transformations. The resulting adaptive metastructures will significantly enhance the field of self-actuating metamaterials with distributed intelligent capabilities. The results of this research will be a leap forward in the design of self-reconfigurable cardiovascular implants, swimming meta-robots, and passive flow-rate control systems.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

设计可与流动流体有效相互作用的可重构超材料的能力可以彻底改变各种医疗和机器人设备的设计和操作，从自重构心血管假体到被动控制的软阀和可变形软机器人。这些设备通常在高能量含量的环境中操作，具有不稳定的流动流体，但是不存在使它们能够在不依赖于外部能量源的情况下收集和重定向该能量以高效且自主地执行分布式致动的技术。实现这种愿景的一个令人信服的范例是使用多稳态超材料，通过非线性过渡波存储和选择性释放能量-这些大振幅波顺序地将元件从一个稳定状态切换到另一个稳定状态。该学院早期职业发展（CAREER）补助金将支持研究，以建立流动响应多稳态超材料的分析和实验基础，这些材料表现出可调的动态特性，并通过利用流体-结构相互作用执行理想的任务。这些超材料将形成用于设计动态系统的构建块，该动态系统在流体刺激下维持目标功能。这个职业生涯项目将实施一项雄心勃勃的计划，将研究和教育相结合，并为公众宣传制定创新战略，展示动态超材料领域的社会效益，并激发高中生的兴趣。通过将机械超材料和流体流动环境相结合，这项研究将展示如何利用流体-结构相互作用和过渡波来有效地实现动态系统和流场中所需的动态行为。结合分析，数值和实验方法，流体-超结构相互作用将被用作双重“动态旋钮”，以（1）操纵多稳态超材料中的形状重新配置用于驱动目的，以及（2）通过超材料中的过渡波前控制流体通量。可重新编程的动态特性和自调节流量的能力将被耦合到被动地获得刚性的需求和分布式驱动。这项研究将是未来工程结构发展的一个里程碑，具有前所未有的可调动态特性和流动诱导的形状转换。由此产生的自适应元结构将显着增强具有分布式智能能力的自致动超材料领域。该研究成果将是自重构心血管植入物、游泳元机器人和被动流速控制系统设计的一个飞跃。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。