Self-Healing Sandwich Composites

自修复三明治复合材料

• 批准号: 0825709
• 负责人: Kara Peters
• 金额: $ 30万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0825709&HistoricalAwards=false
• 关键词: Self; Healing; Sandwich; Composites

The major aim of the proposed research is the development of a self-healing structural system that can self-repair after extreme events, such as multiple dynamic impacts, and also self-assess the effectiveness of the repair. This self-healing capability will be accomplished through a room temperature cure epoxy resin healing system delivered through embedded glass fibers. The delivery system will be integrated with an optical fiber sensor network that self-repairs through the phenomenon of self-writing in photopolymerizable resins. A multi-physics predictive computational model of the entire process that accounts for the interrelated processes of photopolymerization, lightwave propagation in a heterogeneous structure, opto-mechanical interactions and sandwich composite damage mechanics will also be derived. The model will be applied to lifetime predictions of the self-healed structural system.The ability of a structural system to survive catastrophic events such as earthquakes, blast loads, or multiple impacts through self-repair of critical components would significantly improve the safety of critical airframes and civil infrastructure systems. Furthermore, the capability of the repaired structure to assess its structural condition would be invaluable to evaluate the necessity of further repairs, and would reduce the loss of life for rescue workers or future users of the structural system. Undergraduate students will be recruited to work with the research group through the NSF REU program and the PIs will participate in programs for academically gifted high school students from underrepresented groups across the state of North Carolina.

拟议研究的主要目的是开发一种自我修复的结构系统，该系统可以在极端事件（如多次动态冲击）后进行自我修复，并自我评估修复的有效性。这种自我修复能力将通过室温固化环氧树脂愈合系统通过嵌入式玻璃纤维交付完成。该传输系统将与光纤传感器网络集成，该网络通过光聚合树脂中的自写入现象进行自我修复。一个多物理预测计算模型的整个过程，占光聚合，光波传播的异质结构，光-机械相互作用和夹层复合材料损伤力学的相互关联的过程也将被导出。该模型将应用于自愈结构系统的寿命预测。通过关键部件的自我修复，结构系统在地震、爆炸载荷或多重撞击等灾难性事件中的生存能力将显著提高关键机体和民用基础设施系统的安全性。此外，修复结构评估其结构状况的能力对于评估进一步修复的必要性将是非常宝贵的，并且将减少救援人员或结构系统未来用户的生命损失。本科生将通过NSF REU项目被招募与研究小组合作，PI将参加北卡罗来纳州代表性不足群体中学业有天赋的高中生项目。