GOALI: Fundamental Understanding and Suppression of Microcracking in Three Dimensional Woven Composites During Curing

目标：对三维编织复合材料固化过程中微裂纹的基本理解和抑制

• 批准号: 1100409
• 负责人: Igor Tsukrov
• 金额: $ 43.79万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-04-01 至 2015-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1100409&HistoricalAwards=false
• 关键词: GOALI; Fundamental; Understanding; Suppression; Microcracking

This Grant Opportunity for Academic Liaison with Industry (GOALI) project will provide fundamental understanding of how local stress concentrations and formation of damage during curing are related to the weave architecture and fabrication parameters of three-dimensional woven composites. Comprehensive numerical modeling tools to predict microcracking during matrix cure and under service conditions will be developed and validated by experiments. Experimental studies will be performed on the specimens specifically fabricated in industrial setting to support the modeling effort and gain a better understanding of the mechanisms of resin pocket cracking. They will include microstructure characterization using optical and SEM microscopy, microcomputed tomography, traditional mechanical testing, residual stress determination by material removal, and multiaxial stress tests on neat resin. Guidelines for safe design of three-dimensional woven composites will be proposed. Advances in understanding and modeling of microcracking in 3D woven composites during resin curing will lead to improvements in technology of manufacturing and ?tailoring? of these materials for various applications. Demonstrating that they can be produced free of microcracks with inexpensive resins will greatly expand their utilization in aerospace, automotive, ground transportation, wind energy, and recreational marine industries. The work will be conducted in close collaboration between the University of New Hampshire and Albany Engineered Composites, Inc., and will be disseminated through journal publications, conference presentations and two industrial workshops.

该学术与工业联络资助机会 (GOALI) 项目将提供对固化过程中局部应力集中和损伤形成如何与三维编织复合材料的编织结构和制造参数相关的基本了解。将开发并通过实验验证用于预测基体固化期间和使用条件下的微裂纹的综合数值建模工具。实验研究将在工业环境中专门制造的样本上进行，以支持建模工作并更好地了解树脂袋破裂的机制。它们将包括使用光学和 SEM 显微镜、微计算机断层扫描、传统机械测试、通过材料去除确定残余应力以及纯树脂上的多轴应力测试的微观结构表征。将提出三维编织复合材料的安全设计指南。对树脂固化过程中 3D 编织复合材料中微裂纹的理解和建模的进步将导致制造和“定制”技术的改进。这些材料用于各种应用。证明它们可以用廉价的树脂生产而没有微裂纹，这将极大地扩大它们在航空航天、汽车、地面交通、风能和休闲海洋工业中的应用。这项工作将由新罕布什尔大学和奥尔巴尼工程复合材料公司密切合作进行，并将通过期刊出版物、会议演讲和两个工业研讨会进行传播。