赤外線応力画像からの応力分離と実証試験による材質と試験片厚さの影響

概要

論文の詳細を見る
The new method of stress separation was proposed in order to evaluate individual stress components from the sum of the principal stresses obtained from an infrared stress image. This method is based on the inverse problem analysis which uses the least squares method and the intelligent hybrid method. In order to prove this method, the experiment by infrared thermography was carried out using three kinds of materials and four kinds of the thickness of the specimen. The specimen with the thin thickness of 1mm was influenced greatly by heat conduction. The thickness effect on the stress intensity factor was not recognized in specimens thicker than 3mm. The error of a stress intensity factor increases linearly along with the increase in the thermal conductivity. The infrared hybrid method can evaluate the stress intensity factor of a low thermal conductivity material by high accuracy.
一般社団法人日本機械学会の論文
2004-01-25