Tunable Tensegrity Structures and Metamaterials

可调谐张拉整体结构和超材料

• 批准号: 2323276
• 负责人: Glaucio Paulino
• 金额: $ 65.96万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-03-01 至 2027-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2323276&HistoricalAwards=false
• 关键词: Tunable; Tensegrity; Structures; Metamaterials

Tensegrities are special structures composed of compression struts connected by a continuous network of tension cables in a state of prestress. These structures exhibit extreme properties such as low-mass and weight, high-resilience, high-strength, and rich-tunability. These properties can be harnessed for use in engineering applications and potentially exceed the performance of currently established solutions. In addition, tensegrity structures have been used in an increasing number of engineering applications, including deployable domes, tunable antennas, and sustainable adaptive solar arrays to name a few. From a geometrical perspective, tensegrities have been shown to be scalable: applications ranging from large space structures to the micro and nano scales have proven their cross-scale applicability. Although many have viewed the prestress requirement as a hindrance to further development of tensegrity structures, this project explores this burgeoning trend by continuing to examine the premise that prestress requirements enable tensegrities to be deployable, tunable, and morphable. This research project will contribute theoretical, computational and experimental capabilities to advance the field of tensegrity structures and metamaterials, and to discover novel modes of tensegrity functionality. The research will be complemented by establishing a flexible educational and outreach program based on curriculum development, training demonstrations, and increasing awareness of these structures by disseminating our findings and tools, in addition to sharing investigator experiences broadly to the public and research communities. The goal of the research is to achieve a deep understanding of tensegrities in order to: (i) design or find tensegrities in any geometry, with the possibility of holes and openings, allowing for application specific tensegrity designs; (ii) use additive manufacturing to conduct rapid prototyping and proof of concept of new designs; (iii) construct and manufacture large-scale application-oriented tensegrity structures (e.g. human-scale), document the experience, and disseminate the challenges and solutions; (iv) design programmable/reprogrammable tensegrity-based metamaterials and study their dynamic characteristics using a Bloch wave analysis framework; and (v) investigate the influence of prestress level to change the size and distribution of band gaps within the tensegrity metamaterial. Specifically, this project should lead to the creation and analysis of elegant Class-1 (“floating struts”) reprogrammable tensegrity metamaterials, and large-scale tensegrity structures which may be used in the design of temporary shelters or structural component protection, among others. As such, it will advance the knowledge base in structures, theoretical and computational mechanics, manufacturing, and materials engineering.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.

张力是特殊的结构，由在预应力状态下通过张力电缆连续网络连接的压缩支柱组成。这些结构暴露了极端特性，例如低质量和重量，高弹性，高强度和丰富的性能。可以利用这些属性用于工程应用程序，并可能超过当前建立的解决方案的性能。此外，紧张的结构已用于越来越多的工程应用程序中，包括可部署的植物，可调天线和可持续的自适应太阳能阵列等。从几何学角度来看，紧张趋势已被证明是可扩展的：从大空间结构到微型和纳米尺度的应用已证明它们的跨尺度适用性。尽管许多人认为预应力的要求是进一步发展紧张结构的障碍，但该项目通过继续研究预应力要求使紧张趋势能够可部署，可调和可变形的前提来探讨这种新兴趋势。该研究项目将贡献理论，计算和实验能力，以提高张力结构和超材料的领域，并发现新颖的紧张式功能模式。这项研究将通过建立基于课程开发，培训演示的灵活的教育和外展计划来完成，除了向公众和研究社区分享研究者的经验外，还通过传播我们的发现和工具来提高对这些结构的认识。该研究的目的是深入了解张力，以便：（i）在任何几何形状中设计或找到张力的张力，并有可能有孔和开口，从而允许使用特定应用的张力设计； （ii）使用添加剂制造进行快速原型制作和新设计概念证明； （iii）结构和制造大规模的面向应用程序的张力结构（例如人类规模），记录经验并传播挑战和解决方案； （iv）设计可编程/可重编程的基于张力的超材料，并使用Bloch波分析框架研究其动态特征； （v）研究预应力水平改变张力超材料内带隙的大小和分布的影响。具体而言，该项目应导致对优雅1类（“浮动撑杆”）可重编程的张力超材料的创建和分析，以及可用于设计临时庇护所或结构组件保护等的大规模张力结构。因此，它将推进结构，理论和计算机制，制造业和材料工程的知识基础。该奖项反映了NSF的法定任务，并且使用基金会的知识分子优点和更广泛的影响评估标准，被认为值得通过评估来提供支持。