FMSG: Shape-programmable elastic-plastic tubes as building blocks for origami

FMSG：形状可编程的弹塑管作为折纸的构建块

• 批准号: 2036164
• 负责人: Lei Li
• 金额: $ 49.54万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-01-01 至 2024-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2036164&HistoricalAwards=false
• 关键词: FMSG; Shape; programmable; elastic; plastic

The art of origami converts two-dimensional sheets such as paper into complex 3D shapes. In recent years, engineers and scientists have adopted origami for practical applications including deployable structures for the military or NASA, self-folding robots that can be microfabricated in thin sheet form, and actuators that respond to stimuli such as changes in temperature or acidity. This Future Manufacturing Seed Grant (FMSG) project will develop the new concept of tube origami in which complex 3D shapes are realized by bending tubes rather than sheets. This award supports fundamental research on the design and future manufacturing of tube origami, at a scale hitherto unexplored. Numerous potential applications for tube origami are anticipated, e.g. reducing the environmental impact of processes such as composite manufacturing or allowing eco-friendly techniques such as 3D printing of concrete to be adopted more broadly. This project will maintain US leadership in advanced manufacturing, promote scientific progress, and increase national prosperity. It will foster multi-disciplinary collaboration between investigators with diverse expertise in plastics processing, computational mechanics, and polymer science. The research will support the training of two graduate students at the University of Pittsburgh, and several undergraduate researchers at the University of Pittsburgh and the Penn State University. Both institutions are committed to recruiting underrepresented minorities into research. The investigators will conduct outreach at undergraduate and pre-college level on the translation of origami art towards origami engineering to attract diverse students towards STEM fields.The concept of elastic-plastic tube origami is based on two ideas. The first is that the difference between elastic versus inelastic deformation in a composite can be exploited to drive shape changes. The second is the concept of using bending of tubes (rather than bending of sheets) to create origami. This project will improve the scientific understanding of the bending mechanics of elastic-plastic composites and apply that knowledge to implement tube origami. The chief experimental tasks in this project are to manufacture bilayered elastic-plastic tubes by coextrusion, create surface "defects" on the tube using lasers, and quantify the bending of the tubes in response to pressure. The chief computational tasks are to develop 3D finite element simulations to create a predictive model for the deformation and use such simulations for rational design of the defect patterns needed to approximate any desired sequence of bending. This Future Manufacturing research is supported by the Divisions of Materials Research, Mathematical Sciences, and Civil, Mechanical and Manufacturing Innovation.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.

折纸艺术将纸等二维纸张转化为复杂的3D形状。近年来，工程师和科学家将折纸应用于实际应用，包括用于军事或NASA的可展开结构、可以以薄片形式微制造的自动折叠机器人，以及对温度或酸度变化等刺激做出反应的执行器。这个未来制造种子资助(FMSG)项目将开发出管折纸的新概念，其中复杂的3D形状是通过弯曲管而不是板材来实现的。该奖项支持对管状折纸的设计和未来制造的基础研究，规模到目前为止还没有探索过。预计管状折纸的许多潜在应用，例如减少复合材料制造等工艺对环境的影响，或允许更广泛地采用绿色环保技术，如混凝土的3D打印。该项目将保持美国在先进制造业中的领导地位，促进科学进步，促进国家繁荣。它将促进在塑料加工、计算力学和聚合物科学方面具有不同专业知识的研究人员之间的多学科合作。这项研究将支持匹兹堡大学的两名研究生以及匹兹堡大学和宾夕法尼亚州立大学的几名本科生的培训。这两家机构都致力于招募代表性不足的少数族裔参与研究。研究人员将在本科生和大学预科阶段开展将折纸艺术转化为折纸工程的外展活动，以吸引不同的学生进入STEM领域。弹塑管状折纸的概念基于两个想法。首先，复合材料中弹性变形和非弹性变形之间的差异可以被用来驱动形状变化。第二种是使用管子的弯曲(而不是板材的弯曲)来创造折纸的概念。这个项目将提高对弹塑性复合材料弯曲力学的科学理解，并将这些知识应用于实现管折纸。该项目的主要实验任务是通过共挤出制造双层弹塑性管材，使用激光在管材上制造表面缺陷，并量化管材在压力下的弯曲程度。主要的计算任务是开发3D有限元模拟来创建变形的预测模型，并使用这种模拟来合理设计近似任何所需的弯曲序列所需的缺陷图案。这项未来制造研究得到了材料研究、数学科学以及土木工程、机械和制造创新部门的支持。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Mechano‐Activated Shape Morphing of Aluminum–Plastic Laminate Composites

• DOI: 10.1002/adem.202301111
• 发表时间: 2023-09
• 期刊: Advanced Engineering Materials
• 影响因子: 3.6
• 作者: Chien Nguyen;Karthik Ramalingam;Zachary Kushnir;Fatemeh Rouhani;S. Velankar