CAREER: Mechanics of Nano-Crumples

职业：纳米皱纹的力学

• 批准号: 2237063
• 负责人: Wenjie Xia
• 金额: $ 58.95万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2028-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2237063&HistoricalAwards=false
• 关键词: CAREER; Mechanics; Nano; Crumples

This Faculty Early Career Development (CAREER) award will support research that seeks to understand the fundamental mechanical behavior of crumpled nanostructures across multiple scales. Crumpled matter is ubiquitous in nature and daily life, serving both biological and engineered purposes. Understanding the mechanics of crumples at small scales is inherently challenging due to their multifaceted hierarchical structure. This award will develop an integrated experimental-computational framework for determining and predicting the complex behavior of crumpled matter composed of nano-sheets. The predictive models and tools will enable and facilitate the design and development of lightweight, multifunctional applications in energy storage, drug delivery, solid lubrication, and nanocomposite-based structures. The education component of this project will focus on knowledge transfer to K-12, undergraduate, and graduate students with emphasis on underrepresented groups. The implementation of artistic elements in the form of visual and paper arts will be a key strategy to engage students through hands-on outreach activities and exciting learning material.The objective of this project is to establish an integrated experimental-computational framework to determine and predict the complex structural and mechanical behavior of nano-crumpled sheets by understanding their deformation mechanisms at the nanoscale and above. The research will focus on how surface adhesion as a key driving force could improve the load-bearing capacity and flaw tolerance of nano-crumpled sheets by spatially rearranging stress distributions within a hierarchical structure. Basic mechanics models of crumples, coarse-grained molecular dynamics, mechanical testing, and machine learning will form the bases of the approach. Specific research tasks include: 1) Understanding the complex structure of crumpled nanosheets as a function of varying sizes, shapes, elasticity, and adhesion; 2) Elucidating the role of surface adhesion in the deformation of nano-crumples with and without defects or engineered cuts; 3) Determining structure-property correlations operative at the nanoscale and higher.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.

这项教师早期职业发展（职业）奖将支持旨在了解跨多个尺度的纳米结构的基本机械行为的研究。皱巴巴的物质本质和日常生活无处不在，既服务生物学和工程目的）。由于其多方面的层次结构，理解小尺度上的皱纹的力学本质上是具有挑战性的。该奖项将开发一个综合的实验计算框架，以确定和预测由纳米片组成的皱巴巴物质的复杂行为。预测模型和工具将实现并促进轻巧，多功能应用在储能，药物输送，固体润滑和基于纳米复合材料的结构中的设计和开发。该项目的教育部分将集中于知识转移到K-12，本科生和研究生，重点是代表性不足的群体。以视觉和纸张艺术形式实施艺术元素将是通过动手外展活动和令人兴奋的学习材料吸引学生的关键策略。该项目的目的是建立一个集成的实验计算框架，以确定和预测纳米杂交的复杂结构和机械行为，通过理解其在纳米尺寸和上面的纳米尺寸和上方的纳米杂交机制的复杂结构和机械行为。这项研究将集中于表面粘附作为关键驱动力如何通过在层次结构内空间重新排列应力分布来改善纳米碎片的承重能力和缺陷耐受性。皱纹，粗粒分子动力学，力学测试和机器学习的基本力学模型将构成方法的基础。特定的研究任务包括：1）了解皱巴巴的纳米片的复杂结构，这是不同大小，形状，弹性和粘附的函数； 2）阐明表面粘附在具有和没有缺陷或工程切割的纳米碎片变形中的作用； 3）确定纳米级和更高的结构 - 质地相关性操作。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响评估标准，被认为值得通过评估来获得支持。