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Vol.1(1979) >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10649/275

Title: 交流電気ポテンシャル式き裂長さ測定法
Other Titles: Electrical potential method using alternating current for mearuring crack lengths
Authors: 長谷川, 光彦
根本, 実
藍葉, 幹雄
小俣, 豊
児玉, 昭太郎
Authors Affiliation: 長岡技術科学大学
日本鋼管
日本酵素
東京都水道局三河島処理場
東京都立大学工学部
Issue Date: 25-Mar-1980
Publisher: 長岡技術科学大学
Journal Title: 長岡技術科学大学研究報告
Volume: 1
Start page: 22
End page: 27
Abstract: A new electrical potential method is developed to measure crack length, where the alternating current is used instead of the direct current. This alternating current system rejects the potential due to the Zebec effect between the potential leads and the test specimen, that is, this system is little affected by the specimen temperature. He lockin amplifier is used to amplify and detect the alternating input with suppressed noise.This method does not require the delicate techniques such as in the direct current method and can easily get the noiseless and stable data over a long hours test. To show these, some experiments are made in the room temperature \sim\-160\C\ low temperature fating test, under which a measurement by the direct current method will be difficult.
language: ja
Contents Version: publisher
URI: http://hdl.handle.net/10649/275
ISSN: 0388-5631
Appears in Collections:Vol.1(1979)

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