CAREER: Mechanical Behavior of Graphene-Carbon Fiber Composites

职业：石墨烯-碳纤维复合材料的机械行为

• 批准号: 2015732
• 负责人: Mehran Tehrani
• 金额: $ 44.11万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-12-15 至 2023-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2015732&HistoricalAwards=false
• 关键词: CAREER; Mechanical; Behavior; Graphene; Carbon

This Faculty Early Career Development (CAREER) Program grant will develop the fundamental science for the design and characterization a new family of damage-tolerant composite materials that are strong, stiff, and ductile. Carbon fiber reinforced polymer-matrix composites are currently considered state-of-the-art for defense, energy, and transportation applications. These polymer-matrix composites, however, suffer several limitations, including brittle fracture and poor damage tolerance, both of which result in catastrophic failures in composite structures. The novel composites, based on graphene within a carbon fiber matrix, address major shortcomings of traditional polymer-matrix alternatives such as the lack of ductility and the propensity to damage and therefore has the potential to help save billions of dollars in failure and inspection costs across multiple industries on an annual basis. The polymer-free nature of the graphene-carbon fiber (matrix) composite will enable resistance to high impact energy, electromagnetic interference (EMI), high temperatures, and harsh environments. These multifunctional aspects will significantly reduce cost and design complexity and can potentially result in the manufacturing of safer and more durable structures for defense, energy, and transportation applications. This project will also result in effective platforms to attract and train students in this emerging field and has the increasing enrollment in Mechanical Engineering at the University of New Mexico, specifically women. The grant also supports activities directed at increasing the interest in STEM education in the local community among ethnic minorities including Native American college students and Hispanic K-12 students.This project will investigate and elucidate the underlying mechanisms that can be used to control and tailor the ductility and damage progression in carbonaceous nanocomposites, specifically in graphene-carbon fiber composites. Graphene-based materials have been extensively studied recently, mainly by incorporating trial and error approaches, to optimize their mechanical properties rather than effectively studying to understand the underlying mechanisms. These studies have shown promising results but cannot be used to tailor mechanical properties due to the vast design parameter space available to graphene-based materials. This project utilizes a combined numerical modeling and state-of-the-art multi-scale characterization approach to understand and tailor mechanical properties in the graphene-carbon fiber (matrix) composites. The research objectives include the understanding of the stress-transfer mechanisms at the graphene-carbon fiber interface and elucidation of the underlying failure mechanisms in these composites. These resolution of these underlying mechanisms will answer some of the long-standing scientific questions and challenges regarding the strength-ductility trade-off in nanocomposites.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）计划赠款将开发设计和表征的基本科学，这是一种新的耐受耐受性复合材料，这些材料坚固，僵硬和延性。目前，碳纤维增强的聚合物矩阵复合材料被认为是防御，能源和运输应用的最先进。然而，这些聚合物 - 马trix复合材料遭受了几个局限性，包括脆性断裂和损伤耐受性差，这两者都导致复合结构中的灾难性失败。基于碳纤维基质中石墨烯的新型复合材料介绍了传统聚合物矩阵替代品的主要缺点，例如缺乏延展性和损害倾向，因此有可能帮助节省数十亿美元的失败和检查成本每年多个行业。石墨烯 - 碳纤维（矩阵）复合材料的无聚合物性质将使高冲击能量，电磁干扰（EMI），高温和恶劣环境具有抵抗力。这些多功能方面将显着降低成本和设计复杂性，并可能导致制造用于防御，能源和运输应用的更安全，更耐用的结构。该项目还将导致有效的平台吸引和培训这个新兴领域的学生，并在新墨西哥大学（尤其是妇女）的机械工程入学率越来越多。该赠款还支持旨在增加包括美国原住民大学学生和西班牙裔K-12学生在当地社区中对STEM教育的兴趣的活动。该项目将调查并阐明可用于控制和量身定制的基本机制碳质纳米复合材料的延展性和损伤进展，特别是在石墨烯 - 碳纤维复合材料中。最近对基于石墨烯的材料进行了广泛的研究，主要是通过结合试验和错误方法来优化其机械性能，而不是有效研究以了解基本机制。这些研究表明结果表现出了令人鼓舞的结果，但由于基于石墨烯的材料可用的庞大设计参数空间，因此不能用于量身定制机械性能。该项目利用组合的数值建模和最先进的多尺度表征方法来理解和量化石墨烯 - 碳纤维（矩阵）复合材料中的机械性能。研究目标包括理解石墨烯 - 碳纤维界面处的应力转移机制，以及对这些复合材料中潜在失败机制的阐明。这些基本机制的这些解决方案将回答一些关于纳米复合材料强度可延误的长期科学问题和挑战。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和知识分子优点和评估来支持的。更广泛的影响审查标准。

项目成果

INVESTIGATING STRESS TRANSFER AND FAILURE MECHANISMS IN GRAPHENE OXIDE-CELLULOSE NANOCRYSTALS FILMS

研究氧化石墨烯-纤维素纳米晶体薄膜中的应力传递和失效机制

• DOI: 10.12783/asc36/35862
• 发表时间: 2021
• 期刊: PROCEEDINGS OF THE AMERICAN SOCIETY FOR COMPOSITES—THIRTY-SIXTH TECHNICAL CONFERENCE ON COMPOSITE MATERIALS
• 作者: JAYATILAKA, GEHAN;MOHAMMADI, MOHAMMAD MOEIN;TEHRANI, MEHRAN
• 通讯作者: TEHRANI, MEHRAN

Additive manufacturing of recyclable, highly conductive, and structurally robust graphite structures

可回收、高导电性和结构坚固的石墨结构的增材制造

• DOI: 10.1016/j.addlet.2022.100061
• 发表时间: 2022
• 期刊: Additive Manufacturing Letters
• 作者: Mohammadi, Mohammad Moein;Choi, Samuel;Koirala, Pratik;Jayatilaka, Gehan C.;Ghousifam, Neda;Celio, Hugo;Tehrani, Mehran
• 通讯作者: Tehrani, Mehran

Correlating Structure to Damping and Stiffness in Graphene Oxide Films

氧化石墨烯薄膜结构与阻尼和刚度的关联

• DOI: 10.12783/asc37/36445
• 发表时间: 2022
• 期刊: American Society for Composites-Thirty-Seventh Technical Conference
• 作者: Jayatilaka, Gehan;Ntsoane, William;Mohammadi, Mohammad Moein;Tehrani, Mehran
• 通讯作者: Tehrani, Mehran

Using ultra-thin interlaminar carbon nanotube sheets to enhance the mechanical and electrical properties of carbon fiber reinforced polymer composites

• DOI: 10.1016/j.compositesb.2021.108842
• 发表时间: 2021-04-05
• 期刊: COMPOSITES PART B-ENGINEERING
• 影响因子: 13.1
• 作者: Koirala, Pratik;van de Werken, Nekoda;Tehrani, Mehran
• 通讯作者: Tehrani, Mehran