CAREER: Performance through Curvature – An Integrated Computational and Experimental Study of the Mechanics of 3D Self-Architected Materials

职业：通过曲率实现性能 — 3D 自建筑材料力学的综合计算和实验研究

• 批准号: 2142460
• 负责人: Carlos Portela
• 金额: $ 76.49万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-02-01 至 2028-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2142460&HistoricalAwards=false
• 关键词: CAREER; Performance; through; Curvature; Integrated

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2).This Faculty Early Career Development (CAREER) grant will focus on providing a fundamental mechanical understanding of self-architected materials, i.e., materials whose three-dimensional (3D) architecture is determined by natural processes as opposed to being designed a priori by humans. The integrated computational and experimental approach will concentrate on relating geometric parameters such as curvature to the resulting mechanical responses, providing mechanics-based design guidelines and predictive tools for this family of metamaterials. Self-architected materials with 3D architectures at the nano-to-microscale present a potential route for scalable nanomaterials that are lightweight and attain extreme mechanical properties, but their curvature-to-mechanical property relation remains largely unknown. This research project will contribute to filling those fundamental knowledge gaps by providing a knowledge base that facilitates the design of new types of lightweight centimeter-scale materials with aperiodic self-architected nanoscale features that do not rely on advanced additive manufacturing, and whose mechanical properties could surpass those of classical architected materials. Uncovering the mechanics of self-architected materials can lead to advanced lightweight structural materials for aerospace applications, protective coatings for defense capabilities, and design principles for resilient engineered materials—all of which would contribute towards solving ongoing mechanics-of-materials engineering challenges. An integrated educational and outreach program will accompany research efforts, focusing on virtual and in-person engagement of K-12 students and educators—including an augmented reality framework—introducing design, fabrication, and experiments on 3D architected materials to a broader audience, particularly to underrepresented (e.g., Hispanic) groups. The specific objective of this project is to uncover geometry-to-mechanics relations for self-architected materials, such as those derived via spinodal decomposition processes, that enable prediction and understanding of their mechanical properties such as their stiffness, strength, and fracture toughness as a function of curvature distribution. Expanding on the concept that negative Gaussian curvature provides stretching-dominated deformation in shell-based architected materials, this project seeks to significantly expand on this curvature-induced benefit by determining how the directionality of negative-curvature enhances the mechanical properties. This approach will integrate four thrusts that include scalable fabrication of the phase-separation self-architected materials, computational frameworks to design and predict the mechanical properties of desirable morphologies, and nanomechanical experiments on both naturally self-architected samples and on 3D-printed microscale prototypes. Most research efforts will concentrate on understanding curvature-dependent beyond-linear effective properties and failure mechanisms of self-architected materials, towards the design of lightweight but tough scalable architected materials.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.

该奖项的全部或部分资金根据《2021 年美国救援计划法案》（公法 117-2）提供。该教师早期职业发展 (CAREER) 赠款将侧重于提供对自架构材料的基本机械理解，即三维（3D）结构由自然过程决定的材料，而不是由人类先验设计的材料，综合计算和实验方法将集中于将曲率等几何参数与最终的力学联系起来。响应，为该系列超材料提供基于力学的设计指南和预测工具，具有纳米到微米尺度的 3D 结构，为可扩展的纳米材料提供了一条潜在的途径，这种材料重量轻，具有极端的机械性能，但它们的曲率很高。与机械性能的关系在很大程度上仍然未知，该研究项目将通过提供有助于设计新型轻质厘米级非周期材料的知识库，有助于填补这些基础知识空白。自架构纳米级特征不依赖于先进的增材制造，其机械性能可能超越传统的建筑材料。揭示自架构材料的力学可以带来用于航空航天应用的先进轻质结构材料，以及用于防御能力的保护涂层。 ，以及弹性工程材料的设计原则——所有这些都将有助于解决持续存在的材料力学工程挑战，一个综合的教育和推广计划将伴随研究工作，重点关注 K-12 学生和学生的虚拟和现场参与。教育工作者（包括增强现实框架）向更广泛的受众，特别是代表性不足的群体（例如西班牙裔）介绍 3D 建筑材料的设计、制造和实验。该项目的具体目标是揭示几何与力学的关系。自构造材料，例如通过旋节线分解过程衍生的材料，可以预测和理解其机械性能，例如作为曲率分布函数的刚度、强度和断裂韧性。该项目扩展了负高斯曲率在基于壳的建筑材料中提供拉伸主导变形的概念，旨在通过确定负曲率的方向性如何影响机械性能来显着扩展这种曲率带来的好处。该方法将整合四种方法。推动力包括相分离自架构材料的可扩展制造、设计和预测所需形态的机械性能的计算框架以及纳米力学实验大多数研究工作将集中于了解自建筑材料的曲率相关超线性有效特性和失效机制，以设计轻质但坚韧的可扩展建筑材料。授予 NSF 的法定使命，并通过评估反映使用基金会的智力优点和更广泛的影响审查标准，被认为值得支持。

项目成果

Predicting the influence of geometric imperfections on the mechanical response of 2D and 3D periodic trusses

预测几何缺陷对 2D 和 3D 周期桁架机械响应的影响

• DOI: 10.1016/j.actamat.2023.118918
• 发表时间: 2023-08
• 期刊: Acta Materialia
• 影响因子: 9.4
• 作者: Glaesener, R.N.;Kumar, S.;Lestringant, C.;Butruille, T.;Portela, C.M.;Kochmann, D.M.
• 通讯作者: Kochmann, D.M.

Dynamic diagnosis of metamaterials through laser-induced vibrational signatures

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
• 发表时间: 2023-11
• 期刊: Nature
• 影响因子: 64.8
• 作者: Kai, Yun;Dhulipala, Somayajulu;Sun, Rachel;Lem, Jet;DeLima, Washington;Pezeril, Thomas;Portela, Carlos M.
• 通讯作者: Portela, Carlos M.

Tunable Mechanical Response of Self-Assembled Nanoparticle Superlattices

自组装纳米颗粒超晶格的可调谐机械响应

• DOI: 10.1021/acs.nanolett.3c01058
• 发表时间: 2023-06
• 期刊: Nano Letters
• 影响因子: 10.8
• 作者: Dhulipala, Somayajulu;Yee, Daryl W.;Zhou, Ziran;Sun, Rachel;Andrade, José E.;Macfarlane, Robert J.;Portela, Carlos M.
• 通讯作者: Portela, Carlos M.