权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Collaborative Research: Process-Specific Topology Optimization for 3D-Printed Hierarchical Composites and Structures

协作研究：3D 打印分层复合材料和结构的特定工艺拓扑优化

基本信息

批准号：
1825815
负责人：
Brett Compton
金额：
$ 36.44万
依托单位：
University of Tennessee Knoxville
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-01 至 2023-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1825815&HistoricalAwards=false
关键词：
Collaborative Research Process Specific Topology

项目摘要

A close look at almost any biological structure reveals an elegant and complex hierarchical arrangement of materials at different length scales that imparts desirable mechanical robustness and function to the structure with minimal wasted material. Prior to the development of additive manufacturing technologies, the creation of components with analogous complexity and hierarchy using engineering materials has been prohibitively expensive or entirely impossible. Now, additive manufacturing technologies, which build materials and structures from the ground up using incremental deposition of material, have opened the doors to designing and creating entirely new classes of structures with unprecedented complexity, hierarchy, and performance. However, design tools do not currently exist that can identify the optimal combinations of materials, hierarchy, and shape for any given application, nor do engineers yet understand exactly when, how, and why hierarchy leads to superior performance. This award will improve our understanding of how structural hierarchy in mechanical components leads to superior performance and create a novel method for designing such structures. By generating this knowledge, design engineers will be better able to make decisions about if, when, and how to utilize hierarchy to create stronger, stiffer, lighter, more efficient components for applications ranging from implants, prosthetics, and sporting equipment, to shipping and aerospace. The project includes activities to educate high school students about advanced manufacturing and dissemination of results directly to industry.This research will focus on fused filament fabrication and direct-ink writing, since these additive technologies are the most widely accessible and have seen rapid recent development in new high strength, lightweight composite feedstocks. The specific scope of the project is comprised of a series of coupled experimental/numerical research tasks. These tasks build from assessing the effects of 3D printing and hierarchy in simple, classic topology optimization benchmark problems to designing, fabricating, and evaluating designs that utilize cellular infill with graded shape and density. By incorporating the unique features that result from material extrusion additive manufacturing (i.e., perimeter, infill, and material anisotropy) into topology optimization schemes, structures will be optimized specifically for the combination of feedstock material and type of hierarchy desired. While additive manufacturing technology has become ubiquitous in schools, universities, and industry, systematic approaches to teach "design for additive manufacturing" require further development. This project will also help address this national imperative through hands-on additive manufacturing and topology optimization demonstrations, industry educational seminars, and outreach programs for underrepresented minorities, women, and persons with disabilities that will inspire the next generation Science, Technology, Engineering, and Math workforce.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.

仔细观察几乎任何生物结构都会发现，不同长度尺度的材料都有优雅而复杂的分层排列，从而以最小的浪费材料赋予结构理想的机械稳健性和功能。在增材制造技术发展之前，使用工程材料制造具有类似复杂性和层次结构的部件已经非常昂贵或完全不可能。现在，增材制造技术，即利用材料的增量沉积，从头开始构建材料和结构，为设计和创造全新的结构类别打开了大门，这些结构具有前所未有的复杂性、层次和性能。然而，目前还没有设计工具可以为任何给定的应用确定材料、层次结构和形状的最佳组合，工程师们也没有确切地了解何时、如何以及为什么层次结构会带来卓越的性能。该奖项将提高我们对机械部件结构层次如何导致卓越性能的理解，并为设计此类结构创造一种新方法。通过了解这些知识，设计工程师将能够更好地决定是否、何时以及如何利用层次结构来创造更强、更硬、更轻、更高效的组件，这些组件的应用范围从植入物、假肢、体育器材到航运和航空航天。该项目包括向高中学生传授先进制造和直接向工业界传播成果的活动。这项研究将集中在熔融长丝制造和直接墨水书写上，因为这些添加剂技术是最容易获得的，并且最近在新的高强度，轻质复合原料方面发展迅速。该项目的具体范围由一系列耦合的实验/数值研究任务组成。这些任务从评估3D打印和层次结构在简单，经典拓扑优化基准问题中的效果，到设计，制造和评估利用具有渐变形状和密度的细胞填充的设计。通过将材料挤压增材制造产生的独特特征（即周长、填充和材料各向异性）纳入拓扑优化方案，结构将针对原料材料和所需层次类型的组合进行优化。虽然增材制造技术在学校、大学和工业中无处不在，但教授“增材制造设计”的系统方法需要进一步发展。该项目还将通过实际操作的增材制造和拓扑优化演示、行业教育研讨会以及针对代表性不足的少数民族、妇女和残疾人的外展计划，帮助解决这一国家迫切需要的问题，这些计划将激励下一代科学、技术、工程和数学劳动力。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。