Fracture of Polymeric Heterogeneous Materials with Micro- and Nano-Fillers: Multiscale Measurements and Modeling

具有微米和纳米填料的聚合物异质材料的断裂：多尺度测量和建模

• 批准号: 0509060
• 负责人: Hareesh Tippur
• 金额: $ 4万
• 依托单位: Auburn University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-15 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0509060&HistoricalAwards=false
• 关键词: Fracture; Polymeric; Heterogeneous; Materials; Micro

Fracture of Polymeric Heterogeneous Materials with Micro-Fillers Multiscale Measurements (Revised Title)Broader Impact: Particulate composites constitute an important sub-class of composite materials used in a number of engineering applications - light-weight structures, solid propellants, electronic systems and MEMS, biologically inspired materials, - to name a few. In this context, understanding the failure behavior of particulate composites at both micro- and macro-scales is central to the design and reliability of mechanical members made of these materials.Intellectual Merit: An investigation into the fracture behavior of polymeric heterogeneous materials with micron size fillers under static and dynamic loading conditions is proposed. Present literature on the topic is generally limited to quasi-static studies and the proposed work will address much needed understanding of potential loading rate effects on fracture behavior of this class of materials. The research will focus on the interplay between filler particle size and volume fraction on the effective fracture toughness of materials under low- and high-strain rates of loading. The work will be limited to micron size fillers and will include aspects of material processing, macro- (optical and/or strain gage measurements) and micro- (SEM, surface profilers) measurements and phenomenological modeling of the fracture process. Educational Aspects: On the educational front, the proposed research will be used to partially support a graduate student in an integrated learning program involving materials processing, mechanical and optical characterization of materials and modeling. Original research from the program will be disseminated through archival journal publications, presentations at focussed symposia and world-wide-web.

具有微填料的聚合物非均质材料的断裂多尺度测量(修订标题)更广泛的影响：颗粒复合材料构成了在许多工程应用中使用的复合材料的一个重要子类--轻质结构、固体推进剂、电子系统和MEMS、生物启发材料等。在这种背景下，了解颗粒复合材料在微观和宏观尺度上的破坏行为对于由这些材料制成的机械构件的设计和可靠性是至关重要的。目前关于这一主题的文献一般仅限于准静态研究，拟议的工作将解决对加载速率对这类材料断裂行为的潜在影响的迫切需要的理解。研究将集中在低应变率和高应变率加载下，填料颗粒大小和体积分数对材料的有效断裂韧性的影响。这项工作将仅限于微米级的填料，并将包括材料加工、宏观(光学和/或应变片测量)和微观(扫描电子显微镜、表面轮廓仪)测量以及断裂过程的现象学建模等方面。教育方面：在教育方面，拟议的研究将用于部分支持研究生参加涉及材料加工、材料的机械和光学表征以及建模的综合学习计划。该方案的原创研究将通过档案期刊出版物、专题讨论会上的演讲和万维网进行传播。