自己相関ロックイン赤外線サーモグラフィ法の開発とき裂モニタリングへの適用

• 阪上 隆英

  阪大工

• 西村 隆

  阪大院

• 久保 司郎

  阪大工

書誌事項

タイトル別名

• Development of self-reference lock-in thermography and its application to crack monitoring

抄録

In the thermoelastic stress analysis, stress distribution is measured by lock-in infrared thermography, which correlates temperature change due to the thermoelastic effect with reference loading signal. Loading signal from external source, such as load-cell, strain gage or displacement gage, is usually employed as a reference signal in the conventional technique. In this study, a self-reference lock-in thermography was newly developed, in which a reference signal was constructed by using the same sequential data on thermoelastic temperature change. Temperature change in a region of interest was correlated with that in a remote area for reference signal construction. The lock-in algorithm based on the least squares method was employed for signal processing under random loading. It enabled us to measure the distribution of relative intensity of applied stress under random loading without using any external loading signal. Proposed self-reference lock-in thermography was applied for crack identification based on the detection of significant thermoelastic temperature change due to the stress singularity in the vicinity of crack tips. It was found that significant temperature change was observed at the crack tip in the self-reference lock-in thermal image, demonstrating the feasibility of the proposed technique.

収録刊行物

• 評価・診断に関するシンポジウム講演論文集

  評価・診断に関するシンポジウム講演論文集 2004.3 (0), 123-127, 2004

  一般社団法人 日本機械学会

詳細情報

• CRID: 1390282680866564096
• NII論文ID: 110004057761
• DOI: 10.1299/jsmesed.2004.3.123
• ISSN: 24243027
• Web Site: https://www.jstage.jst.go.jp/article/jsmesed/2004.3/0/2004.3_123/_pdf
• 本文言語コード: ja
• データソース種別:
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  • Crossref
  • CiNii Articles
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