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CAREER: Understanding Ultrasonic Processing of Layered Polymer Composites Across Length Scales

职业：了解跨长度尺度的层状聚合物复合材料的超声波加工

基本信息

批准号：
2045955
负责人：
Genevieve Palardy
金额：
$ 58.6万
依托单位：
Louisiana State University
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：
2021-07-01 至 2026-06-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2045955&HistoricalAwards=false
关键词：
CAREER Understanding Ultrasonic Processing Layered

项目摘要

This Faculty Early Career Development (CAREER) Program grant supports research contributing to the understanding that underpins the ultrasonic processing of fiber-reinforced polymer composites, promoting both the progress of science and revitalizing the U.S. manufacturing industry. Composite materials possess high strength and low weight, as compared to conventional materials like metals, which can be tailored according to fiber orientation and layer sequence. Certain polymer composites offer further sustainability because they may be reformed at high temperatures, recycled, and joined through fusion bonding. Current manufacturing techniques typically require high temperature and expensive tooling, which limits the use of thermoplastic composites as primary structural components in a wide range of industries. In the search for energy and cost-efficient manufacturing and assembly techniques, processing through ultrasonic vibrations is a promising candidate that can achieve consolidation and bonding in a fraction of the time required by traditional methods. This fundamental research furthers the development of ultrasonic processing of composites, advancing growth of several applications in aerospace, transportation, maritime, piping, and wind energy industries. An integrated outreach plan includes hands-on activities to engage a diverse population of K-12 girls, as well as training of undergraduate and graduate students through senior design projects and technical elective courses. This will result in a highly trained workforce for the composites manufacturing industry and thus, will support national prosperity.The challenges in the use of ultrasonic processing for polymer composites are due, in part, to the difficulty in experimentally capturing the detailed processes of occurring at the interface due to ultra-fast cycle times and geometrical constraints to the region of interest. This proposal addresses those challenges by elucidating processing-structure-performance relationships and establishing novel experimental and modeling solutions. More specifically, it will address two main research objectives: 1) understand how ultrasonic and material parameters govern heat generation and crystallization mechanisms through multiscale experiments (from molecular structure to macro-scale); and 2) establish a multiphysics finite element model based on experimental outcomes to simulate the process and predict bonding efficiency. Achieving greater understanding of this process will allow scale up and confident deployment for critical applications.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.

该学院早期职业发展（CAREER）计划资助支持有助于理解纤维增强聚合物复合材料超声加工的研究，促进科学进步和振兴美国制造业。与传统材料如金属相比，复合材料具有高强度和低重量，可以根据纤维取向和层顺序进行定制。某些聚合物复合材料提供了进一步的可持续性，因为它们可以在高温下重新形成，回收，并通过熔融粘合连接。目前的制造技术通常需要高温和昂贵的工具，这限制了热塑性复合材料作为主要结构部件在广泛的行业中的使用。在寻找能源和成本效益的制造和组装技术，通过超声波振动处理是一个有前途的候选人，可以实现巩固和粘接在一小部分的时间所需的传统方法。这一基础研究进一步推动了复合材料超声加工的发展，推动了航空航天、运输、海事、管道和风能行业中几种应用的增长。一个综合的推广计划包括动手活动，以吸引不同人口的K-12女孩，以及通过高级设计项目和技术选修课程的本科生和研究生的培训。这将为复合材料制造业带来训练有素的劳动力，从而支持国家的繁荣。在聚合物复合材料的超声波加工中使用的挑战，部分是由于在实验上捕捉的细节过程中发生的困难，由于超快的周期时间和几何约束的兴趣区域。该提案通过阐明加工-结构-性能关系并建立新颖的实验和建模解决方案来解决这些挑战。更具体地说，它将解决两个主要的研究目标：1）通过多尺度实验（从分子结构到宏观尺度）了解超声和材料参数如何控制热生成和结晶机制; 2）根据实验结果建立多物理场有限元模型，以模拟过程并预测键合效率。该奖项反映了NSF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。