Nanoscale Design of Interfacial Kinematics in Composite Manufacturing

复合材料制造中界面运动学的纳米级设计

基本信息

批准号：
2001038
负责人：
Sirish Namilae
金额：
$ 39.17万
依托单位：
Embry-Riddle Aeronautical University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-07-01 至 2024-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2001038&HistoricalAwards=false
关键词：
Nanoscale Design Interfacial Kinematics Composite

项目摘要

The ubiquitous usage of polymer matrix composites in aerospace, automotive, and other applications necessitates both a fundamental understanding of the manufacturing process and novel design strategies to engineer their behavior. Ply interfaces are known to play a crucial role in composite manufacturing. Movement of ply interfaces during curing can lead to manufacturing defects that affect the composite structure performance and have been a limiting factor in several applications, resulting in delays and redesigns of products like aircraft and civil infrastructure. This grant aims at understanding the evolution and movement of composite interfaces during their manufacturing through the development of a novel in-situ characterization approach using digital image correlation (DIC). In addition, nanoscale interfacial components such as zinc oxide (ZnO) nanowires will be utilized to mechanically alter the interfacial behavior during curing. Multiscale computational modeling will complement experimental investigations. The outcome of this research will lead to novel diagnostics that reduce processing-induced defects and addresses the current manufacturing needs of the commercial and defense industries. The educational impacts of the project involve the development of a vertically integrated pathway for engaging students in materials engineering, all the way from K-12 to graduate school.This research will elucidate the role of interfacial kinematics and energetics in the evolution of inter-ply interfaces in composite structures during manufacturing. The research team will develop a novel experimental method for in-situ characterization of surface and interface deformations during composite processing, utilizing a customized commercial composite autoclave with a digital image correlation system. The surface strain and displacement measurements will be combined with ex-situ X-ray tomography and thermal characterization to map the interfacial thermomechanical response as a function of design and processing parameters. Additionally, the interfacial behavior will be engineered through the rapid and controlled growth of ZnO nanowires on carbon fibers to create a nanoscale interfacial component that increases the fiber bending resistance and creates an interlocking effect at the interfaces to mitigate defects propagation. The experimental research will be complemented by molecular dynamics simulations of the sliding of amorphous polymer interfaces and mesoscale simulation of flow in porous media. This comprehensive approach of in-situ characterization, interface design, and modeling will lead to a fundamental understanding of the ply movement during composite manufacturing and development of methods to reduce the occurrence of processing-induced defects.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.

聚合物基复合材料在航空航天、汽车和其他应用中的普遍使用需要对制造过程的基本了解和新颖的设计策略来设计其行为。众所周知，层界面在复合材料制造中发挥着至关重要的作用。固化过程中层界面的移动可能会导致制造缺陷，从而影响复合材料结构的性能，并成为多种应用中的限制因素，导致飞机和民用基础设施等产品的延迟和重新设计。该资助旨在通过开发一种使用数字图像相关（DIC）的新型原位表征方法来了解复合材料界面在制造过程中的演变和运动。此外，氧化锌（ZnO）纳米线等纳米级界面成分将用于机械地改变固化过程中的界面行为。多尺度计算模型将补充实验研究。这项研究的成果将带来新颖的诊断方法，减少加工引起的缺陷，并满足商业和国防工业当前的制造需求。该项目的教育影响包括开发一条垂直整合的途径，让学生从 K-12 一直到研究生院，参与材料工程。这项研究将阐明界面运动学和能量学在层间演化中的作用制造过程中复合结构中的界面。研究团队将开发一种新颖的实验方法，利用带有数字图像相关系统的定制商用复合材料高压釜，对复合材料加工过程中的表面和界面变形进行原位表征。表面应变和位移测量将与异位 X 射线断层扫描和热表征相结合，以将界面热机械响应绘制为设计和加工参数的函数。此外，界面行为将通过ZnO纳米线在碳纤维上的快速、受控生长来设计，以创建纳米级界面组件，从而增加纤维的抗弯曲性并在界面处产生联锁效应以减轻缺陷传播。无定形聚合物界面滑动的分子动力学模拟和多孔介质流动的介观模拟将补充实验研究。这种原位表征、界面设计和建模的综合方法将使人们对复合材料制造过程中的层运动有一个基本的了解，并开发出减少加工引起的缺陷发生的方法。该奖项反映了 NSF 的法定使命，并已被通过使用基金会的智力优点和更广泛的影响审查标准进行评估，认为值得支持。