CAREER: Intensifying multi-material additive manufacturing using advective assembly

职业：使用平流装配强化多材料增材制造

• 批准号: 2339472
• 负责人: Alexandra Bayles
• 金额: $ 53.2万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-03-01 至 2029-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2339472&HistoricalAwards=false
• 关键词: CAREER; Intensifying; multi; material; additive

Multi-material additive manufacturing incorporates multiple species within a single 3D-printed object to enhance its mechanical properties and functionality. This technology could bolster local manufacturing efforts and improve the resilience of supply chains. However, conventional layer-by-layer construction methods must operate at low volumetric throughputs to maintain fine feature resolution, limiting the number of objects that can be produced in a given time. To overcome this challenge, this project will design, fabricate, and test modular 3D printing nozzles engineered to structure multi-material composites rapidly before deposition. Achieving faster multi-material printing with higher resolution will open new avenues to product development and manufacturing in several sectors, including health care, electronic device fabrication, and food processing. Building local manufacturing infrastructure requires a dedicated user community as much as it requires new technologies. As such, a synergistic aim of this award is to empower engineering students to serve as science ambassadors and conduct outreach in the broader community. The proposed research will elucidate the maximal gains that can be achieved by advective assembly nozzles. Advective assemblers combine add, cut, and rotation junctions in particular sequences to enhance chaotic advection and align, multiply, and shrink co-flowing streamlines. The modular fluidic devices can extrude fine hierarchical architectures (e.g., dendritic trees and interdigitated electrodes) that can be tailored for specific additive manufacturing applications. However, it is unclear how architectures distort when the tortuous geometries are operated at high flow rates. This award will use experimental and computational tools to systematically study architecture fidelity as a function of three classes of independent variables: device geometry, ink rheology, and volumetric throughput. The results will elucidate the fundamental mechanics at work, the architectures that can be realized, the inks that can be processed, and the potential throughputs that can be achieved using advective assembly.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.

多材料增材制造在单个 3D 打印物体中融合了多种物质，以增强其机械性能和功能。这项技术可以增强当地的制造能力并提高供应链的弹性。然而，传统的逐层构建方法必须在低体积吞吐量下运行才能保持精细的特征分辨率，从而限制了给定时间内可以生产的物体数量。为了克服这一挑战，该项目将设计、制造和测试模块化 3D 打印喷嘴，这些喷嘴旨在在沉积之前快速构建多材料复合材料。实现更快、更高分辨率的多材料打印将为多个领域的产品开发和制造开辟新途径，包括医疗保健、电子设备制造和食品加工。建设本地制造基础设施需要专门的用户社区，就像需要新技术一样。因此，该奖项的一个协同目标是使工程专业的学生能够担任科学大使，并在更广泛的社区中进行推广。拟议的研究将阐明平流组件喷嘴可以实现的最大增益。平流装配器以特定序列组合添加、剪切和旋转连接点，以增强混沌平流并对齐、倍增和收缩共流流线。模块化流体设备可以挤出精细的分层架构（例如，树突树和叉指电极），这些架构可以针对特定的增材制造应用进行定制。然而，目前尚不清楚当曲折的几何形状在高流速下运行时，结构如何变形。该奖项将使用实验和计算工具来系统地研究架构保真度作为三类自变量的函数：设备几何形状、墨水流变学和体积吞吐量。结果将阐明工作中的基本机制、可以实现的架构、可以处理的油墨以及使用平流组装可以实现的潜在吞吐量。该奖项反映了 NSF 的法定使命，并被认为值得通过以下方式获得支持：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。