CAREER: Exploiting Time Dependent Behavior and Structure in Developing Programmable Materials

职业：利用时间相关行为和结构开发可编程材料

• 批准号: 2145803
• 负责人: James Gibert
• 金额: $ 60.18万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-02-15 至 2027-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2145803&HistoricalAwards=false
• 关键词: CAREER; Exploiting; Time; Dependent; Behavior

This Faculty Early Career Development (CAREER) grant supports the development of a new generation of programmable materials that can control and monitor vibrations and shock events in real time. This technology has the potential to influence various applications ranging from improving the sensing and monitoring infrastructure to revolutionizing the emerging field of smart packaging. As an example, these materials allow for in-situ modification of the energy absorbing capabilities of systems whose conditions can change over time due to aging and/or due to changing temperatures, and, as such, they can reduce the cost of replacing vibration reduction equipment. This CAREER grant will introduce new mechanisms to program the stiffness and time-dependent mechanical and inertial behavior of these materials. The educational outreach will address systemic barriers placed upon marginalized students, who are often placed in less rigorous mathematics courses, by offering project-based experiential activities to engage students and foster an understanding of the applications of mathematics in a real-world context. These efforts also aim to demonstrates to the PI's research team the importance of STEM outreach with the goal of increasing diversity and inclusion in academia.The research goal of this CAREER project is to investigate the physics, and establish a mathematical foundation, that governs the interplay between topology and nonlinear and time-dependent material behavior in heterogeneous mechanical metamaterials. Applications range from vibration suppression and shock absorption to the development of metamaterials with self-sensing capabilities. This research will fill a fundamental knowledge gap in systematic techniques and theories that conceptualize mechanical metamaterials. The project work will focus on metamaterials with heterogeneity that arises from: 1) an inclusion in the topology of an elastomeric matrix, coined a ``digital element", and 2) the combination of materials whose behavior is primarily viscoelastic with a material whose behavior is primarily elastic and/or hyperelastic. The selective placement /and or removal of these digital elements allows for the systematic programming of a single host structure to exemplify a host of inertial and elastic behaviors leading to a range of dynamic responses when used as a component in a vibratory system. We hypothesize that the composite viscoelastic and hyperelastic materials will allow the host structure to have tailored novel strain dependent responses. The activities will develop the fundamental understanding and establish the mathematical framework needed to exploit these phenomena using the theory of dynamical systems along with analytical and numerical modeling, material characterization, and experimental testing. The resulting framework will then be used to improve the development of metamaterials with self-sensing capabilities.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.

这项学院早期职业发展(Career)补助金支持新一代可编程材料的开发，这些材料可以实时控制和监测振动和冲击事件。这项技术有可能影响各种应用，从改进传感和监控基础设施到彻底改变新兴的智能包装领域。例如，这些材料允许就地修改系统的能量吸收能力，这些系统的条件可能随着时间的推移而因老化和/或温度变化而改变，因此，它们可以降低更换减振设备的成本。这项职业资助将引入新的机制来编程这些材料的刚性和随时间变化的机械和惯性行为。教育外展将通过提供以项目为基础的体验式活动，让学生参与进来，并促进对数学在现实世界中的应用的理解，从而解决对边缘化学生施加的系统性障碍，这些学生往往被安排在不那么严格的数学课程中。这些努力也旨在向PI的研究团队展示STEM推广的重要性，目标是增加学术上的多样性和包容性。这个职业项目的研究目标是研究物理，并建立一个数学基础，管理非均质机械超材料中拓扑与非线性和依赖时间的材料行为之间的相互作用。应用范围从减振和减震到开发具有自我感知能力的超材料。这项研究将填补机械超材料概念化的系统技术和理论方面的基本知识空白。该项目的工作将侧重于具有异质性的超材料，这种异质性产生于：1)弹性体矩阵拓扑中的包裹体，称为“数字元素”，以及2)其行为主要是粘弹性的材料与其行为主要是弹性和/或超弹性的材料的组合。这些数字元件的选择性放置/和/或移除允许单个主机结构的系统编程，以例示当用作振动系统中的组件时导致一系列动态响应的大量惯性和弹性行为。我们假设，复合粘弹性和超弹性材料将允许宿主结构具有量身定制的新的应变相关响应。这些活动将发展基本的理解，并建立利用动力系统理论以及分析和数值建模、材料表征和实验测试来利用这些现象所需的数学框架。由此产生的框架将用于改进具有自我感知能力的超材料的开发。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Nonlinear Dynamics of a Two Members Angle-Shaped Energy Harvester

二元角形能量收集器的非线性动力学

• DOI: 10.1115/smasis2022-90623
• 发表时间: 2022
• 期刊: Adaptive Structures and Intelligent Systems
• 作者: Danzi, Francesco;Tao, Hongcheng;Joodaky, Amin;Gibert, James M.
• 通讯作者: Gibert, James M.

The Presence of Chaos in a Viscoelastic Harmonically Forced Von Mises Truss

粘弹性简谐振动冯米塞斯桁架中存在的混沌

• DOI: 10.1115/detc2023-116683
• 发表时间: 2023
• 期刊: and Control (MSNDC
• 作者: Ghoshal, Pritam;Gibert, James;Bajaj, Anil K.
• 通讯作者: Bajaj, Anil K.

Heterogeneous digital stiffness programming

异构数字刚度编程

• DOI: 10.1016/j.eml.2022.101832
• 发表时间: 2022
• 期刊: Extreme Mechanics Letters
• 影响因子: 4.7
• 作者: Tao, Hongcheng;Danzi, Francesco;Silva, Christian E.;Gibert, James M.
• 通讯作者: Gibert, James M.

Characterization of Nonlinear Kirigami Springs Through Transient Response

通过瞬态响应表征非线性剪纸弹簧

• DOI: 10.1115/detc2022-93913
• 发表时间: 2022
• 期刊: ASME 2022 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
• 作者: Danzi, Francesco;Jenkins, Joshua;Tao, Hongcheng;Gibert, James M.
• 通讯作者: Gibert, James M.