Collaborative Research: 3D Printing of Civil Infrastructure Materials with Controlled Microstructural Architectures

合作研究：具有受控微结构的民用基础设施材料 3D 打印

• 批准号: 1563389
• 负责人: Florence Sanchez
• 金额: $ 14.59万
• 依托单位: Vanderbilt University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-06-15 至 2020-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1563389&HistoricalAwards=false
• 关键词: Collaborative; Research; 3D; Printing; Civil

This collaborative project is to use additive manufacturing (3D printing) to engineer the microstructure of cement-based materials and fabricate cement-based structures with otherwise unachievable, controlled local composition of the material and spatial arrangement of its components. The goal of the research is to understand the major factors controlling the 3D printing process of cement-based materials and how to design interfacial interactions between printed filament layers and between filament inclusions and solid matrix phases. Though the use of additive manufacturing, the proposed research project has the potential to enable significant progress in the fields of high-performance infrastructure materials by providing materials that exhibit paradigm-shifting properties allowing new functionalities that are not achievable with existing materials. Ultimately, the 3-D printing processes will enable the fabrication of light-weight and modular structures and buildings for rapid deployment in cases of natural disasters and product applications wherein cement-based materials have not previously been competitive. The educational component will leverage existing programs of each of the three institutions and includes the development of instructional materials for undergraduate and graduate students and research opportunities for a diverse group of undergraduate students.The goal of this collaborative research is to fundamentally understand (1) the intertwined mechanisms between chemistry, printed filament layer solidification, and 3D printing successive-layering-deposition process conditions and (2) the interfacial interactions between printed layers that control the bonding mechanism. 3-D printing is anticipated to enable the controlled spatial variation of material properties through continuous gradients in functional components. Experimental investigations of the filament layer solidification process and of the interfacial characteristics will be integrated with computational analysis, including molecular dynamics simulations of the molecular scale structure, energetics, and mechanical properties of the inter-filament and interfaces to unravel the physico-chemo-mechanical mechanisms that underpin the processing/manufacturing-microstructure-property relationship of the architectured materials. The research will (1) provide a molecular to nanoscale picture of the chemo-mechanical interactions between filament layers and between the filament inclusions and matrix interfaces, (2) identify key aspects of the structure at interfaces necessary to enable refinement of surfaces and printing media chemistry, and (3) provide insights into the development of a new approach to understanding and developing cementitious systems.

该协作项目是使用添加剂制造（3D打印）来设计基于水泥的材料的微观结构和制造基于水泥的结构，并具有原本无法实现的，可控的局部组成的材料和空间布置其组件。该研究的目的是了解控制基于水泥的材料的3D打印过程的主要因素，以及如何在印刷细丝层之间以及丝状包含物和实心基质阶段之间设计界面相互作用。尽管使用增材制造，但拟议的研究项目有可能通过提供具有范式转移特性的材料，从而在高性能基础设施材料领域取得重大进展，从而允许现有材料无法实现的新功能。最终，在自然灾害和产品应用程序中，基于水泥的材料以前没有竞争力的情况，3-D打印过程将使轻质和模块化结构和建筑物的制造能够快速部署。 The educational component will leverage existing programs of each of the three institutions and includes the development of instructional materials for undergraduate and graduate students and research opportunities for a diverse group of undergraduate students.The goal of this collaborative research is to fundamentally understand (1) the intertwined mechanisms between chemistry, printed filament layer solidification, and 3D printing successive-layering-deposition process conditions and (2) the interfacial interactions between printed layers控制键合机制。预计3-D打印可以通过功能组件中的连续梯度来控制材料特性的空间变化。灯丝层固化过程和界面特征的实验研究将与计算分析集成，包括分子尺度结构的分子动力学模拟，丝网组间和界面的机械性能，以揭示生理化学机制机制的机制机制，从而构建了构造构建构造的构造构建构建构建构建的构造概念。该研究将（1）提供纳米级的分子图片，描述了细丝层之间的化学机械相互作用以及丝状夹杂物和矩阵界面之间的化学机械相互作用，（2）确定在界面处确定结构的关键方面，以启用表面和印刷媒体化学的改进，并为理解和不断发展的系统提供洞察力，并（3）为系统的发展提供了新的方法。