インテリジェントハイブリッド法による界面き裂近傍場の計測

概要

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In this study, the phase shifting method of moire-interferometry was used to clarify deformation behavior near an interfacial crack tip. In this experiment, a bimaterial specimen of epoxy and aluminum was used. The unwrapped phase distributions obtained by the phase shifting method of moire-interferometry were automatically wrapped and converted to continuous displacement distributions by using image processing. The measured displacement data were used as the input data of the intelligent hybrid method, which was previously developed by the authors. The intelligent hybrid method successfully demonstrated to obtain smooth higher-order quantities such as the stresses and the strain energy density, automatically detecting and eliminating errors and noises in the experimentally measured displacement fields. Furthermore, for the interfacial crack tip, the path independent separated J integrals useful for interfacial fracture mechanics were actually evaluated. The mixed-mode stress intensity factors were also extracted using the component separation method of the J integral.
2001-07-25