Passive Smart Cementitious Composites for Dynamic Control Structures: Internal Timed Release of Chemicals for Self-Repair of Crack Damage

用于动态控制结构的被动智能水泥基复合材料：内部定时释放化学物质以自我修复裂纹损伤

• 批准号: 9202097
• 负责人: Victor Li
• 金额: $ 16万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-15 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9202097&HistoricalAwards=false
• 关键词: Passive; Smart; Cementitious; Composites; Dynamic

This proposal represents an investigation into the feasibility of developing a smart structural composite which has a self-healing capability whenever and wherever cracks are generated as a result of seismic overloads, cyclic loading or other mechanical or environmental loads. A major focus of this research will be on the timed release of chemicals from hollow fibers which results in (1) crack sealing, and (2) rebonding of debonded/ruptured fibers from the matrix. Candidate chemicals include adhesive, crystallizing rehydrater Xypex, and crosslinking or air curing polymer chemicals. Issues in specific fiber types acting as passive sensors and actuators, in a control system involving fiber/matrix interfacial bond, pseudo strain-hardening and crack width control, in repair mechanisms, real time process visualization, post-event properties, and structural control are addressed in this research.

该提案代表了 可行性研究 开发一种智能结构， 具有自修复功能的复合材料 随时随地的能力 裂缝的产生是由于 地震超载，循环荷载 或其它机械或 环境负荷 一个主要重点 这项研究将在 定时释放化学物质， 中空纤维导致（1） 裂缝密封，以及（2）重新粘合 纤维脱粘/断裂 矩阵 候选化学品 包括粘合剂、结晶 再水化Xypex和交联 或空气固化聚合物化学品。 特定纤维类型的问题 作为被动传感器， 致动器，在控制系统中 涉及纤维/基体界面 粘结、伪应变硬化和 裂缝宽度控制，维修中 机制，真实的时间过程 可视化，事件后 性能和结构控制 在这项研究中得到了解决。