The Mechanics and Microstructural Development of Joints in Metal-Matrix Composites

金属基复合材料接头的力学和微观结构发展

• 批准号: 9302053
• 负责人: Frederick Leckie
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-06-01 至 1997-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9302053&HistoricalAwards=false
• 关键词: Mechanics; Microstructural; Development; Joints; Metal

This interdisciplinary research will investigate the mechanical behavior of model joints in metal matrix composites and its relationship to defects and microstructural features developed during processing. Research will focus on joint geometries commonly found in designing with advanced materials, including both composite-composite and composite-monolithic combinations. Fiber coatings will be used to control the interfacial characteristics of the composites and to develop an understanding of end effects in weakly and strongly bonded systems. Particular emphasis will be placed on the evolution of defects and relevant microstructural features during diffusion bonding, and their role in deformation micromechanics and properties of the joint. Tests will be conducted at elevated and ambient temperatures under various loading conditions and the results related to emerging constitutive laws developed for monolithic and for composite materials. This research should assist in the construction of predictive models for the behavior of joint systems using the principles of micromechanics and processing science.

这项跨学科的研究将研究金属基复合材料中模型接头的力学行为及其与加工过程中产生的缺陷和微观结构特征的关系。研究将集中在先进材料设计中常见的接头几何形状，包括复合材料-复合材料和复合材料-单片组合。纤维涂层将被用来控制复合材料的界面特性，并在弱和强结合系统的端部效应的理解。特别强调的是扩散焊接过程中缺陷和相关微观结构特征的演变，以及它们在变形微观力学和接头性能中的作用。试验将在高温和环境温度下进行，在各种载荷条件下，结果与新兴的本构关系的整体和复合材料。这项研究应有助于使用微观力学和加工科学的原则，在联合系统的行为预测模型的建设。