DMREF/Collaborative Research: Iterative Design and Fabrication of Hyperuniform-Inspired Materials for Targeted Mechanical and Transport Properties

DMREF/合作研究：针对目标机械和传输性能的超均匀材料的迭代设计和制造

• 批准号: 2323341
• 负责人: Karen Daniels
• 金额: $ 98.29万
• 依托单位: North Carolina State University
• 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: 2023-12-01 至 2027-11-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2323341&HistoricalAwards=false
• 关键词: DMREF; Collaborative; Research; Iterative; Design

Micro-lattice and nano-lattice structures are an exciting class of materials with better strength-to-weight and stiffness-to-weight ratios than bulk solids. Many designs and additive-manufacturing approaches (i.e., 3D printing) have emerged recently for creating such materials, with the goal of fabricating commercially available products with optimized mechanical, thermal, acoustic, and electrical properties for biomedical, aerospace, and several other applications. This Designing Materials to Revolutionize and Engineer our Future (DMREF) grant will support development of novel approaches to design a new class of disordered lattice materials that are inspired by the special transport properties, e.g., heat transfer and diffusion, of the so-called “hyperuniform” structures. Hyperuniform materials may nominally be described as materials with minimal density variation as the length scale increases. They arise naturally in biological and chemical systems and can be designed through numerical methods. Numerous studies have demonstrated that such systems facilitate efficient transport behavior with minimal attenuation while also possessing nearly optimal effective elastic stiffness and material fracture suppression. The grant will also provide effective workforce development for a diverse group of undergraduates, PhD students, and postdoctoral researchers in the multidisciplinary areas of engineering, materials science, mathematics, and physics. It will contribute to the public understanding of materials research via publications, outreach, and internship programs for high-school students and teachers. Additionally, there will be an effort to develop entrepreneurship and trainees will be supported in pursuing commercialization of their ideas. The objective of this project is to engineer a new class of ultralight, manufacturable materials with jointly optimized mechanical (stiffness and strength) and transport (thermal, acoustic, and electrical) properties. To achieve this, the approach includes (1) characterization and understanding of the benefits of exploiting local uniformity and hyperuniformity; (2) measurement of mechanical and transport properties to create and understand the structure–process–property diagram for these materials, including the influence of heterogeneity and defects; and (3) development of new computational tools that allow optimization throughout the integrated theory, synthesis, and experiment loop of material development. The research activities will pursue three routes for property co-optimization: (1) adjustments to the initial configuration, including connectivity (theory); (2) material selection and control of microscale heterogeneity that is created by the additive-manufacturing process (synthesis); (3) designing time-varying signals that create specified spatial correlations when applied to structures (experiment). The approach will also include new modeling approaches, such as network analysis to create design heuristics and higher-order stochastic spatial-averaging techniques to account for microscale heterogeneity. These models will efficiently feed back into the design process by allowing the creation of random-network models that generate specific features that also remain manufacturable. The design cycle that forms the basis of the research aims draws heavily on building a shared Configuration Library and Code Library; these will be published for use by other research groups. This project is supported by the Division of Civil, Mechanical and Manufacturing Innovation (CMMI) of the Directorate for Engineering (ENG) and the Division of Mathematical Sciences (DMS) and the Division of Materials Research (DMR) of the Directorate for Mathematical and Physical Sciences (MPS).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.

微晶格和纳米晶格结构是一类令人兴奋的材料，具有比散装固体更好的强度重量比和刚度重量比。许多设计和增材制造方法（即，3D打印）最近已经出现用于创建这样的材料，其目标是制造具有优化的机械，热，声学和电气性能的商业产品，用于生物医学，航空航天和其他几种应用。这个设计材料革命和工程我们的未来（DMREF）赠款将支持开发新的方法来设计一类新的无序晶格材料，这些材料受到特殊传输特性的启发，例如，所谓的“超均匀”结构的热传递和扩散。超均匀材料可以名义上被描述为随着长度尺度增加而具有最小密度变化的材料。它们在生物和化学系统中自然产生，可以通过数值方法设计。许多研究表明，这种系统有助于以最小的衰减实现有效的传输行为，同时还具有接近最佳的有效弹性刚度和材料断裂抑制。该赠款还将为工程，材料科学，数学和物理等多学科领域的本科生，博士生和博士后研究人员提供有效的劳动力发展。它将通过出版物，推广和高中学生和教师的实习计划，促进公众对材料研究的理解。此外，还将努力发展创业精神，并支持学员将其想法商业化。该项目的目标是设计一种新型的超轻可制造材料，其机械（刚度和强度）和运输（热，声学和电气）性能共同优化。为了实现这一目标，该方法包括：（1）表征和理解利用局部均匀性和超均匀性的好处;（2）测量机械和传输性能，以创建和理解这些材料的结构-过程-性能图，包括非均匀性和缺陷的影响;和（3）开发新的计算工具，允许在材料开发的集成理论、合成和实验循环中进行优化。研究活动将遵循三条路线进行属性协同优化：（1）调整初始配置，包括连接性（理论）;（2）材料选择和控制由增材制造过程（合成）创建的微尺度异质性;（3）设计时变信号，当应用于结构时创建指定的空间相关性（实验）。该方法还将包括新的建模方法，如网络分析，以创建设计和高阶随机空间平均技术，以考虑微尺度异质性。这些模型将有效地反馈到设计过程中，允许创建随机网络模型，生成特定的功能，也保持可制造性。构成研究目标基础的设计周期在很大程度上依赖于构建共享的配置库和代码库;这些将被发布供其他研究小组使用。该项目得到了民政司的支持，工程局（ENG）的机械和制造创新（CMMI）以及数学和物理科学局（MPS）的数学科学部（DMS）和材料研究部（DMR）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进行评估，更广泛的影响审查标准。