K-0823 局所自己アフィンフラクタルによる破壊遷移部の同定(S11-6 構造健全性評価(6))(S11 構造健全性評価)

概要

論文の詳細を見る
In the field of the fractography, fractal has been applied to investigate fracture mechanism. In this study, a new method detecting the transition point of fracture surface by calculating the local fractal dimension using Wavelet transformation is proposed. The high accurate evaluation is realized by using not the conventional self-similar fractal but anisotropic self-affine fractal "Hurst exponent" that is more suitable for fracture surface as an evaluation parameter. By applying our method to the brittle-ductile transition region of Charpy test specimen, the transition point was showen quantitatively. The homogeneity of fracture surface was checked in the case of TiAl creep and creep fatigue test specimen.
一般社団法人日本機械学会の論文
2001-08-22