超高速デジタル式ビデオカメラを用いた画像解析手法の開発

亀裂進展問題への適用の試み

抄録

The object of this research is to develop an accurate particle detection method for image analysis. Image analysis with in-situ storage image sensor (ISIS) camera is expected to be a powerful tool for finite deformation problem of continuum medium under high-strain rate. Accurate particle detection is of importance in this application, since the accuracy of detected strain strongly depends on that of particle detection. Tracking of Gaussian particle is combined with the size and configuration of photo diodes on ISIS. Then, the problem of particle detection is successfully reduced to the optimization problem with three variables. The proposed method results in the accuracy of 0.011 pixel according to the numerical simulation.
Finally, the image analysis with proposed method is applied to the crack propagation problem under the impact loading. Strain concentration preceding the crack propagation is obtained through the image analysis.