Self-Sensing Curved Micro-Strip Line Method for Damage Detection of CFRP Composites

作     者：Akira Todoroki Kazuhiro Yamada Yoshihiro Mizutani Yoshiro Suzuki Ryosuke Matsuzaki Hiroyasu Fujita 

作者机构：Aerospace Company Fuji Heavy Industry Tochigi Japan Department of Mechanical Engineering Tokyo University of Science Chiba Japan Department of Mechanical Sciences of Engineering Tokyo Institute of Technology Tokyo Japan Tokyo Institute of Technology Tokyo Japan 

出 版 物：《Open Journal of Composite Materials》 (复合材料期刊（英文）)

年 卷 期：2014年第4卷第3期

页      面：131-139页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Carbon Fibre Composite Laminates Electric Resistance Fiber Breakage Time Domain Reflectometry Self-Sensing 

摘      要：A self-sensing Time Domain Reflectometry (TDR) method for Carbon Fibre Reinforced Polymer (CFRP) laminates has been propped in the present study: carbon fibres are used as sensors using a transmission line. Authors have published research articles of the self-sensing TDR method. The self-sensing TDR method reduces number of required electrodes for damage detections although the sensitivity of detection is sacrificed. A micro-strip line (MSL) method is adopted to obtain impedance matching with a coaxial cable and successfully detected damage in a CFRP laminate in the previous study. In the present study, a long curved MSL is experimentally investigated as an impedance-matched transmission line for detection of damage of a CFRP laminate in wider area. Fibre breakage is simulated as a hole made by drilling. As a CFRP laminate has strongly orthotropic electric conductance and the electric properties of a CFRP laminate at the high frequency are not clarified, the effect of the orthotropic conductance at the curved transmission line is experimentally investigated. As a result, the effect of orthotropic conductance at the curved strip line is shown to be negligible, and fiber breakage that locates closed to the copper strip line can be detected by the self-sensing curved MSL method. It is, however, difficult to detect damage far from the copper strip line.