Electrical Fracto-Emission and Resistivity Change in Carbon Fiber Cement Composites for Nondestructive Integrity Monitoring

用于无损完整性监测的碳纤维水泥复合材料的电压裂发射和电阻率变化

• 批准号: 9522726
• 负责人: Jong Lee
• 金额: $ 17.76万
• 依托单位: Clarkson University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-12-01 至 1999-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9522726&HistoricalAwards=false
• 关键词: Electrical; Fracto; Emission; Resistivity; Change

9522726 Lee An integrated analytical and experimental study is planned to examine a new nondestructive testing capability for carbon fiber cement composites (CFCC) based on recent experimental observations that electrical responses such as the electrical emission or the change in the bulk electrical resistivity can be related to the flaw generation and growth in some materials. Carbon micro-fibers are added to concrete to increase the bulk conductivity of the concrete by forming an intricate network of fibers as an electrical "tag" as well as to improve the structural performance. The primary objective of the proposed study s two-fold: (1) to better understand and explain the fundamental mechanisms associated with the electrical fracto-emission and bulk resistivity change in CFCC, and (2) to establish and validate the experimental data and underlying theoretical basis for the nondestructive testing capability which needs to be responsive to the unique structural characteristics of CFCC.

9522726 Lee 计划进行一项综合分析和实验研究，以检验碳纤维水泥复合材料（CFCC）的新无损检测能力，该能力基于最近的实验观察，即电发射或体电阻率变化等电响应可能与某些材料中缺陷的产生和增长有关。 将碳微纤维添加到混凝土中，通过形成复杂的纤维网络作为电气“标签”来提高混凝土的体积电导率，并改善结构性能。 该研究的主要目标有两个：（1）更好地理解和解释与 CFCC 中电分裂发射和体电阻率变化相关的基本机制；（2）建立和验证需要响应 CFCC 独特结构特征的无损检测能力的实验数据和基础理论基础。