Synergistic Effects of Multiple Enviroments on Composite Degradation

多环境对复合材料降解的协同效应本项目采用一种综合方法来评估聚合物基复合材料在复杂多环境中的长期耐久性。降解条件是使用几个同时运行的环境模拟的，接近平行的真实世界条件，并通过广泛的多学科分析确定了主要降解机制的动力学及其相互关系。最后，在多个长度尺度(从纳米到宏观)的退化机制的综合实验表征(机械、化学和物理)与复杂的分析/数值技术相结合，以开发长期可靠性的预测模型。通过整合寿命预测方法和适当的物理化学降解动力学描述，该项目提供了对复合材料在真实世界、多种环境条件下的使用寿命的预测能力，例如复合材料改造和更换结构缺陷的桥梁、具有更高燃料效率的全复合材料汽车和深水近海石油钻井平台。该项目涉及与行业合作伙伴(Cytec工程材料公司和Resolve Performance Products公司)的积极合作。并得到研究/联邦机构(布鲁克黑文国家实验室和阿伯丁试验场的陆军研究实验室)的支持。教育部分通过研究和教学相结合，大大加强了本科生和研究生的学习。具体活动还与石溪的其他项目合作，为代表不足的少数族裔学生提供指导和外展服务。

ABSTRACTSynergistic Effects of Multiple Environments on Composite DegradationThis project employs an integrated approach to assess the long-term durability of polymer matrix composites exposed to complex multiple environments. Degradation conditions are simulated using several simultaneously operating environments to closely parallel real-world conditions, and the kinetics of main degradation mechanisms and their interrelations are identified through an extensive multi-disciplinary analysis. Finally, comprehensive experimental characterizations (mechanical, chemical and physical) of the degradation mechanisms across multiple length scales (nano to macro) are coupled with sophisticated analytical/numerical techniques to develop predictive models of long-term reliability. By integrating life-prediction methodologies and the appropriate kinetic descriptions of physicochemical degradation, this project provides predictive capabilities for the service life of composite materials in real-world, multiple environmental conditions, e.g. composite material retrofit and replacement of structurally deficient bridges, all-composite automobiles with enhanced fuel-efficiencies and deep-water offshore oil drilling platforms. This project involves active collaboration with industrial partners (Cytec Engineered Materials, Inc. and Resolution Performance Products, Inc.) and support from research/federal agencies (Brookhaven National Labs and Army Research Labs at Aberdeen Proving Grounds). An educational component provides for the significant enhancement of learning for both undergraduate and graduate students by integration of research and teaching. Specific activities also provide mentoring and outreach for underrepresented minority students in collaboration with other programs at Stony Brook.