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

9522726李计划进行一项综合的分析和实验研究，以检验一种新的碳纤维水泥复合材料无损检测能力，该研究基于最近的实验观察，即电学响应，如电发射或体电阻率的变化，可能与某些材料中缺陷的产生和生长有关。碳微纤维被添加到混凝土中，通过形成复杂的纤维网络作为电子标签来增加混凝土的体积导电性，并改善结构性能。S提出的研究的主要目的有两个：(1)更好地了解和解释与CFCC中的电分发射和体电阻率变化相关的基本机制，以及(2)建立和验证针对CFCC独特结构特征的无损检测能力的实验数据和潜在的理论基础。

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.