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.

多物质添加剂制造将多种物种纳入单个3D打印对象中，以增强其机械性能和功能。这项技术可以加强本地制造业的工作，并提高供应链的弹性。但是，传统的按层构造方法必须在低体积吞吐量下运行，以保持精细的特征分辨率，从而限制了可以在给定时间内产生的对象数量。为了克服这一挑战，该项目将设计，制造和测试模块化的3D打印喷嘴，该喷嘴在沉积之前迅速构建多物质复合材料。通过更高的分辨率实现更快的多物质印刷，将为多个领域的产品开发和制造提供新的途径，包括医疗保健，电子设备制造和食品加工。建立本地制造基础架构需要一个专门的用户社区，最需要新技术。因此，该奖项的协同目的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宣传。拟议的研究将阐明对流组装喷嘴可以实现的最大收益。对流汇编器将添加，切割和旋转连接组合为特定序列，以增强混乱的对流，并对齐，多重和收缩共同流动。模块化的流体设备可以挤出可用于特定添加剂制造应用的精细层次结构（例如树突树和嵌入式电极）。但是，目前尚不清楚当曲折的几何形状以高流速运行时，体系构如何变形。该奖项将使用实验和计算工具系统地研究体系结构的忠诚度，这是三类自变量的函数：设备几何形状，墨水流变量和体积吞吐量。结果将阐明工作中的基本力学，可以实现的架构，可以处理的墨水以及可以使用Advictive Adjectlly可以实现的潜在吞吐量。该奖项反映了NSF的法定任务，并被认为是通过使用基金会的智力和更广泛影响的评估来审查CRITERIA的评估，并被认为是值得的。