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打印物体中包含多个物种，以增强其机械性能和功能。这项技术可以支持当地的制造业努力，提高供应链的弹性。然而，传统的逐层构造方法必须在低体积吞吐量下操作以保持精细的特征分辨率，从而限制了在给定时间内可以生产的物体的数量。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，以在沉积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医疗保健、电子设备制造和食品加工等多个领域的产品开发和制造开辟新的途径。建立本地制造基础设施需要一个专门的用户社区，就像它需要新技术一样。因此，该奖项的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装喷嘴可以实现的最大收益。平流汇编器结合联合收割机添加，削减，并在特定的序列旋转路口，以加强混乱的平流和对齐，倍增，并缩小同流流线。模块化流体装置可以突出精细的分层结构（例如，树枝状树和交叉指状电极），其可以针对特定的增材制造应用而定制。然而，尚不清楚当曲折几何形状在高流速下操作时，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独立变量的函数：设备几何形状，油墨流变性和体积吞吐量。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，并通过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，被认为值得支持。