一次元逆問題解析によるモードI形微視割れ原波形導出の解析精度の検討

概要

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Characteristics of a microcrack source are specified in terms of their moment tensor components. However, the moment tensor solution, three-dimensional inverse analysis, is so difficult that a simplified technique, one-dimensional inverse analysis, has been used for acoustic emission source characterization. Since this technique is based on the assumption that the fracture mode is tension-type cracking, analytical errors seem to increase in applying the technique to tension-shear mixed fractures. In order to examine the accuracy of this method, we simulated various kinds of fracture modes and calculated the source time functions and the crack sizes. Comparison of the calculated results with actual solutions shows that, in regard to the estimation of crack sizes and crack formation speeds, one-dimensional inverse analysis is applicable even for tension-shear mixed fractures.
一般社団法人日本機械学会の論文
1990-07-25