EAGER: Dispersion and Selective Positioning of Reinforcement in Polymer Matrix Composites
EAGER:聚合物基复合材料中增强材料的分散和选择性定位
基本信息
- 批准号:1445261
- 负责人:
- 金额:$ 13.48万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2014
- 资助国家:美国
- 起止时间:2014-07-01 至 2015-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Composite materials made with ceramic reinforcements in a polymer matrix offer features of high strength-to-weight ratio, flexibility, and flaw tolerance. One advantage for discontinuous (short) fiber-reinforced composites is the ease of manufacturing complex shaped parts. One disadvantage, however, is reduced strength as compared to continuous (long) fiber-reinforced composites, due to stress concentrations at the fiber ends in the composite during use. This stress localization at the ends of fibers can lead to bond failure between the matrix and fiber reinforcement causing cracks that lead to material failure. The novelty of this project's process is the ability to selectively position a range of particle sizes near the fiber ends to help reinforce and distribute the stress in that zone. This will result in higher strength for composite parts made with discontinuous fiber reinforcement, helping to enable low cost manufacturing of parts with intricate geometries.This EArly-Grant for Exploratory Research (EAGER) project will investigate the homogeneity, stability and reproducibility for fabricating and dispersing suspensions of colloidally-assembled hierarchical ceramic fillers for discontinuous fiber composites. These new materials are predicted to push discontinuous fiber composites toward the holy grail of increased strength and ductility, a combination that is not attainable in most material systems. When these hierarchical assemblies are incorporated into a polymer matrix, the polymer will infiltrate the near-interface of the assemblies to form an interphase region of enhanced mechanical stiffness that encompasses the even stiffer ceramic particles. This new perspective offers a material independent methodology for increasing the properties and performance of discontinuous fiber composites, while maintaining compatibility with bulk, economic, and facile manufacturing techniques such as injection molding, tape-casting or hot-pressing. This research project will answer several fundamental questions associated with stress transfer and failure mechanisms for materials consisting of dissimilar components, and also take advantage of emerging technologies that enable processing of composites with hierarchical morphology (i.e., stepping between macro- micro- and nano- regimes). The work will also provide insight toward the challenges associated with fabrication (i.e., dispersion and preparation) as well as reproducibility and reliability of the composite manufacturing process.
在聚合物基体中使用陶瓷增强材料制成的复合材料具有高强度重量比、柔韧性和缺陷容限的特点。不连续(短)纤维增强复合材料的一个优点是易于制造复杂形状的零件。 然而,一个缺点是与连续(长)纤维增强复合材料相比强度降低,这是由于在使用期间复合材料中纤维端部处的应力集中。在纤维末端的这种应力局部化可导致基质和纤维增强体之间的结合失效,从而引起导致材料失效的裂纹。该项目工艺的新奇在于能够选择性地将一系列颗粒尺寸定位在纤维末端附近,以帮助增强和分布该区域的应力。这将使不连续纤维增强复合材料部件的强度更高,有助于实现复杂几何形状部件的低成本制造。EARLY探索性研究资助(EAGER)项目将研究用于不连续纤维复合材料的胶体组装分级陶瓷填料悬浮液的制造和分散的均匀性、稳定性和再现性。这些新材料预计将推动不连续纤维复合材料向增加强度和延展性的圣杯,这是大多数材料系统无法实现的组合。当将这些分级组装体并入聚合物基质中时,聚合物将渗透组装体的近界面以形成具有增强的机械刚度的界面区域,该界面区域包围甚至更硬的陶瓷颗粒。这种新的视角提供了一种独立于材料的方法,用于提高不连续纤维复合材料的性能和性能,同时保持与批量,经济和简便的制造技术(如注塑,流延或热压)的兼容性。该研究项目将回答与由不同成分组成的材料的应力传递和失效机制相关的几个基本问题,并利用新兴技术,使复合材料具有分层形态(即,在宏观-微观-和纳米区域之间步进)。这项工作还将提供对与制造相关的挑战的见解(即,分散和制备)以及复合材料制造工艺的再现性和可靠性。
项目成果
期刊论文数量(0)
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Randall Erb其他文献
Evaluation of two nitroglycerin dosage forms: A metered spray and a soft gelatin capsule
- DOI:
10.1007/bf01059060 - 发表时间:
1983-12-01 - 期刊:
- 影响因子:2.800
- 作者:
Randall Erb;William Stoltman - 通讯作者:
William Stoltman
Randall Erb的其他文献
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{{ truncateString('Randall Erb', 18)}}的其他基金
CPS: Breakthrough: A Cyber-Physical Framework for Magnetic Resonance Imaging (MRI) Guided Magnetic NanoParticles
CPS:突破:磁共振成像 (MRI) 引导磁性纳米粒子的网络物理框架
- 批准号:
1329649 - 财政年份:2013
- 资助金额:
$ 13.48万 - 项目类别:
Standard Grant
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