2003 Volume 3 Issue 3 Pages 141-147
The measurement data obtained by experiment contains some measurement errors so that the stress analysis cannot be conducted using raw experimental data. Therefore, the stress analysis method based on the intelligent hybrid method was discussed using experimental data obtained by speckle photography and infrared thermography. The speckle photography was conducted on the compact normal and shear (CNS) specimens made of homogeneous and dissimilar materials subjected to mixed-mode loading. The experiment by infrared thermography was carried out using three kinds of materials and four kinds of the thickness of the specimen. 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. The intelligent hybrid method can evaluate the stress field from experimental data with high accuracy.
