Advanced Polymeric Materials: Process Induced Internal Stresses in Laminated Polymer Composites

先进聚合物材料：层压聚合物复合材料中工艺引起的内应力

• 批准号: 9101648
• 负责人: James Seferis
• 金额: $ 15.3万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-15 至 1995-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9101648&HistoricalAwards=false
• 关键词: Advanced; Polymeric; Materials; Process; Induced

This research is to develop both experimental and analytical methods to determine internal stresses induced in laminated composite structures during processing. Through these internal stress characterizations, a methodology will be developed that can provide a basic understanding for controlled processing and performance of composites. Both thermosetting and thermoplastic polymer matrices reinforced with continuous fibers, that are potential candidates for structural materials in the electric power industry, will be examined using well established as well as novel lamination processes. As an integral part of this study, several process monitoring techniques will be evaluated; these techniques could also be used for on-line, long term durability monitoring. Internal stress analysis will be studied on macroscopic as well as microscopic (micro-mechanical) scale considering both time dependent (kinetic) and time independent (thermodynamic) effects. Through the experimental and analytical approach, an attempt will be made to characterize composite system molecular and morphological structural features that are influenced and/or give rise to the internal stresses developed during processing, leading to full property characterization. It is anticipated that the results derived from this study, in conjunction with previous developments, will provide a basic methodology for process analysis of laminated composites that may also provide fundamental information in screening new materials and processes for load bearing structural application of composites in real manufacturing operations focused on the needs of the electric power industry.

这项研究旨在发展实验和分析方法来确定复合材料层合结构在加工过程中产生的内应力。通过这些内应力表征，将开发出一种方法学，可以为复合材料的受控加工和性能提供基本的理解。用连续纤维增强的热固性和热塑性聚合物基质是电力工业中潜在的结构材料候选材料，将使用成熟的和新的层压工艺进行研究。作为这项研究的一个组成部分，将对几种过程监测技术进行评估；这些技术也可以用于在线、长期耐久性监测。内应力分析将在宏观和微观(微观机械)尺度上进行研究，同时考虑时间相关(动力学)和时间无关(热力学)效应。通过实验和分析的方法，将试图表征复合体系的分子和形态结构特征，这些特征在加工过程中受到影响和/或引起内应力，从而导致全面的性能表征。预计这项研究的结果与以前的发展相结合，将为叠层复合材料的工艺分析提供基本的方法，也可能为复合材料在以电力工业需求为重点的实际制造操作中的承载结构应用筛选新材料和新工艺提供基本信息。