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SGER: Exploratory Investigations on a Novel Process for the Fabrication of Multiscale Reinforced Polymer Composites

SGER：对多尺度增强聚合物复合材料制造新工艺的探索性研究

基本信息

批准号：
9908450
负责人：
Ranga Pitchumani
金额：
$ 7万
依托单位：
University of Connecticut
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1999
资助国家：
美国
起止时间：
1999-09-01 至 2001-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9908450&HistoricalAwards=false
关键词：
SGER Exploratory Investigations Novel Process

项目摘要

Polymeric composites with cylindrical fiber reinforcements are employed in many engineering applications. The service life of these composite structures is significantly impacted by failures such as fiber debonding and pull-out from the matrix. One approach to improving the engineering of advanced materials stems from an examination of the morphological architectures in biological systems and natural materials, which owe their impressive structural properties to the hierarchical, multi-scale microstructures. Engineered composite materials with multiscale, branched reinforcement structures mimicking biological and natural systems can, therefore, potentially offer significant property enhancements over conventional cylindrical fiber reinforced composites. This Small Grant for Exploratory Research (SGER) project seeks to perform pilot investigations on a technique for the fabrication of such biomimetic composites. An innovative processing method based on the fluid instability phenomenon of viscous fingering, which under appropriate flow conditions generates fractal arborescent structures spanning several length scales, is proposed to be explored for obtaining the desired reinforcement structures in the composites. The fundamental unknowns concerning the practical feasibility of the technique are proposed to be resolved through systematic experimental studies. The anticipated impact of the proposed innovation is that of opening up a new class of composite structures with superior properties, for use in diverse applications.

具有圆柱形纤维增强体的聚合物复合材料在许多工程应用中被采用。这些复合材料结构的使用寿命受到诸如纤维脱粘和从基体中拔出等故障的显著影响。改进先进材料工程的一种方法源于对生物系统和天然材料中的形态结构的研究，这些材料的令人印象深刻的结构特性归功于分层的多尺度微观结构。因此，具有模仿生物和自然系统的多尺度、分支增强结构的工程复合材料可能比传统的圆柱形纤维增强复合材料提供显著的性能增强。这个探索性研究（SGER）项目旨在对制造这种仿生复合材料的技术进行试点研究。基于粘性指进的流体不稳定现象，提出了一种新的加工方法，该方法在适当的流动条件下产生了跨越几个长度尺度的分形树状结构，可用于在复合材料中获得所需的增强结构。有关的技术的实际可行性的基本未知数，建议通过系统的实验研究来解决。所提出的创新的预期影响是开辟了具有上级性能的新型复合结构，用于各种应用。