Failure Mechanics of 2D Materials for Advanced Coatings and Composites

先进涂层和复合材料的二维材料的失效力学

• 批准号: RGPIN-2019-04418
• 负责人: Filleter, Tobin
• 金额: $ 3.35万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=737616
• 关键词: Failure; Mechanics; 2D; Materials; Advanced

Two dimensional (2D) materials have emerged as a new class of materials that are expected to make disruptive changes to critical applications ranging from aerospace structures to energy storage. In the last decade researchers have demonstrated the extraordinary electrical, thermal, and mechanical properties of individual 2D nanostructures, most notably graphene, however the successful incorporation into largescale materials and devices remains elusive. In particular, 2D materials are know to exhibit extraordinarily high strength & stiffness as well as extraordinarily low friction making them highly desirable as coatings and reinforcements in composite materials. Despite this great promise, macroscopic materials behavior is limited by the ability to resist failure in the presence of critical defects and exposure to cyclic loading or interfacial sliding. While the last decade of nanomechanics research of 2D materials has focused on elucidating intrinsic mechanical properties (i.e. strength, modulus, friction), a next wave of intense research is needed to study their engineering relevant failure properties including fracture toughness, fatigue life, and wear behavior. The proposed RESEARCH PROGRAM aims to bridge the gap between the most promising 2D nanomaterials and their implementation in practical mechanical application (i.e. coatings & composite materials) by extending the fundamental understanding of their intrinsic mechanical behavior to include engineering relevant properties (i.e. fracture toughness, fatigue, wear) that enable prediction of materials failure in the presence of critical defects and cyclic loading/sliding. The program will employ a multiscale approach which combines state of the art experimental nanomechanical testing and atomistic modeling at the nanoscale with micro and macroscopic end use materials testing and continuum modeling. The program will be divided into three thrust areas; I) fracture toughness studies of functionalized and unfunctionalized 2D materials, II) fatigue cyclic failure and lifetime studies of 2D materials and III) tribology (friction & wear) studies of 2D materials in the wear regime. The research program will bridge critical gaps in the fundamental understanding of mechanical failure phenomena relevant to the integration of 2D materials within macroscopic coating and composite materials. The studies within the three thrust areas will provide a new body of knowledge in the area of failure mechanics of 2D materials. This will ultimately lead to unprecedented advancements in coating and composite materials performance which will benefit Canadian companies and organizations in space/aerospace, automotive, and energy storage sectors. It will directly support the training of highly qualified personnel within an interdisciplinary training environment which will leverage unique in situ nanomechanics research infrastructure and international collaboration.

二维（2D）材料已成为一类新的材料，这些材料有望对从航空航天结构到储能的关键应用进行破坏性更改。在过去的十年中，研究人员证明了单个2D纳米结构的非凡电气，热和机械性能，最著名的是石墨烯，但是成功地掺入了大型刻度材料和设备中仍然难以捉摸。特别是，2D材料知道表现出极高的强度和刚度，并且非常低的摩擦力，使其非常可取，可以作为复合材料中的涂料和增援。尽管有这一巨大的希望，但宏观材料行为仍受到在存在临界缺陷的存在以及暴露于环状载荷或界面滑动的能力的限制。虽然2D材料的纳米力学研究的最后十年集中在阐明内在的机械性能（即强度，模量，摩擦）上，但需要进行下一波激烈的研究来研究其工程相关的失败特性，包括骨折韧性，疲劳寿命和磨损行为。 拟议的研究计划旨在通过扩展对其内在机械行为的基本了解，以包括工程相关的属性（即骨折，疲劳，疲劳，疲劳），在材料中的pricection/sl Cy Cy and Cy and Cy and Cy and Cy and and Cy and and Cy and and Cy and and and Cy and and and and和Cy cy。该计划将采用一种多尺度方法，该方法结合了最先进的实验性纳米力学测试和在纳米级的原子模型，并使用微观和宏观终端使用材料测试和连续模型。该程序将分为三个推力区域； i）对功能化和不官能化的2D材料的断裂韧性研究，ii）疲劳循环衰竭和2D材料的寿命研究以及III）在磨损方面对2D材料的摩擦学研究（摩擦和磨损）研究。该研究计划将在对机械故障现象的基本理解中弥合与与宏观涂层和复合材料中2D材料相关的机械故障现象的基本理解。三个推力区域内的研究将在2D材​​料的失败力学领域提供新的知识。这最终将导致涂料和复合材料性能的前所未有的进步，这将使在太空/航空，汽车和储能领域的加拿大公司和组织受益。它将直接支持在跨学科培训环境中对高素质人员的培训，该培训将利用独特的原位纳米力学研究基础设施和国际合作。