Interface Engineering of Fiber Reinforced Calcium-based Composites

纤维增强钙基复合材料界面工程

• 批准号: 1462575
• 负责人: Florence Sanchez
• 金额: $ 29.99万
• 依托单位: Vanderbilt University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1462575&HistoricalAwards=false
• 关键词: Interface; Engineering; Fiber; Reinforced; Calcium

The use of discontinuous and randomly oriented nano/microfibers (steel, carbon, polymer) as reinforcements in calcium-based materials for civil and biomedical applications has received increasing attention due to their promising potential for superior structural and multifunctional composites. The interface between the fibers and the matrix plays a vital role in material performance and must be accurately characterized to effectively design materials. The goal of this research project is to understand reinforcement mechanisms in fiber reinforced calcium-based composites. Fundamental understanding of key features of fiber reinforcements will enable better material design and fabrication strategies. The broader impacts are twofold. Civil engineering applications: Advanced materials that extend the life of civil infrastructure, reduce maintenance costs, and enhance safety and sustainability will save billions of tax dollars a year and have many magnified indirect effects on society. Biomedical applications: Advanced biomimetic materials will provide more effective medical treatments. The educational component will introduce high school students to the intriguing science of the very small and will develop a graduate level course module on material durability.The goal is to fundamentally understand the molecular structure and dynamics at the fiber-solid-liquid interfaces that control reinforcement mechanisms in fiber reinforced calcium-based materials with an emphasis on determining the nature of the interface and how it relates to interfacial mechanical behavior. The focus is on the molecular to nanoscale and the chemo-mechanical interactions at reinforcement matrix interfaces. Molecular dynamics modeling and experimental characterizations of the structure and dynamics of the interfaces will be integrated to (i) elucidate the interfacial interactions between fiber surfaces, calcium-bearing solid phases, and surrounding liquid phases, (ii) quantify and relate the effect of the chemical structure to the mechanical properties of reinforcement matrix interfaces, and (iii) formulate molecular dynamics-informed interface cohesive traction-separation relationships that connect the molecular scale to the micro-continuum scale at interfaces. The research will (i) provide a molecular to nanoscale picture necessary to achieve improved engineering properties, (ii) make advances in relating chemistry and mechanical properties at interfaces, and (iii) bridge the gap between nano-mechanics and micro-mechanics at interfaces.

将不连续和随机定向的纳米/微纤维（钢，碳，聚合物）用作基于钙的基于钙的民用和生物医学应用材料的增强材料，由于其对出色的结构和多功能复合材料的潜在潜力，因此受到了越来越多的关注。纤维和矩阵之间的界面在材料性能中起着至关重要的作用，必须准确地表征有效设计材料。该研究项目的目的是了解纤维增强基于钙的复合材料中的增强机制。对纤维增援部队的关键特征的基本了解将使更好的材料设计和制造策略。更广泛的影响是双重的。土木工程应用程序：延长民用基础设施寿命，降低维护成本并提高安全性和可持续性的高级材料，每年将节省数十亿美元的税收，并对社会产生许多间接影响。生物医学应用：晚期仿生材料将提供更有效的医疗治疗。教育组成部分将向高中生介绍非常小的科学，并将在物料耐用性上开发研究生水平的课程模块。目标是从根本上了解纤维固醇接口处的分子结构和动态，从而控制纤维增强机制在纤维上增强钙基材料的增强机制，并强调与互动和互动的互动性质相关。重点放在纳米级的分子和加固基质接口处的化学机械相互作用上。 Molecular dynamics modeling and experimental characterizations of the structure and dynamics of the interfaces will be integrated to (i) elucidate the interfacial interactions between fiber surfaces, calcium-bearing solid phases, and surrounding liquid phases, (ii) quantify and relate the effect of the chemical structure to the mechanical properties of reinforcement matrix interfaces, and (iii) formulate molecular dynamics-informed interface cohesive在接口处将分子尺度连接到微孔尺度的牵引分离关系。该研究将（i）提供一部分至纳米级的图像，以提高工程特性，（ii）在接口处的化学和机械性能方面取得了进步，以及（iii）在界面上弥合纳米机械和微力学之间的差距。