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

9522726李一个综合的分析和实验研究计划，以检查一个新的无损检测能力的碳纤维水泥复合材料（CFCC）的基础上，最近的实验观察，电响应，如电发射或体积电阻率的变化，可以与缺陷的产生和增长，在一些材料。 将碳微纤维添加到混凝土中以通过形成复杂的纤维网络作为电“标签”来增加混凝土的体积电导率，以及改善结构性能。 提出的研究的主要目标有两个方面：（1）更好地理解和解释与CFCC中的电断裂发射和体电阻率变化相关的基本机制，以及（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.