J0404-4-2 抵抗温度特性利用の電気抵抗変化法によるCFRPの損傷診断([J0404-4]知的材料・構造システム(4):損傷検知・診断・モニタリングII)

概要

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In the previous study, unsupervised detection of delamination cracks in CFRP plates using statistical analysis of temperature characteristic of resistance were developed to prevent electrical resistance changes caused by damages of electrical contact at electrodes. Delamination cracks change temperature characteristic of resistance of CFRP laminates. To detect delaminations without learning processes, electrical resistances of multiple segments of a CFRP laminate at high temperature are compared with those at low temperature and a statistical analysis method discriminates the change. Electrical resistance changes caused by damages of electrical contact at electrodes do not affect the temperature characteristic of resistance. This method has applicability to existing structures and can also detect initial defects. As a result of the previous study, delamination at least 5.3 mm in diameter subjected to a quasi-static load in a quasi-isotropic-plied CFRP plate was detectable without intact data. The diagnosis was not affected by damages of electrical contact at electrodes except for perforated lack of an electrode. The present study employs the unsupervised detection method of delamination cracks and damages of electrical contact at an electrode subjected to falling weight impact loads, and dents subjected to quasi-static loads.
一般社団法人日本機械学会の論文
2010-09-04