複合組織形TiAl合金に発生する分布疲労き裂のフラクタルモデルと余寿命評価

概要

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Mesocracks controlling fatigue fracture at 1073 K in dual phase TiAl alloy were observed by SEM-servo. In this study, the quantitative analysis of the mesocracks and the remaining life assessment was carried out by applying fractal concept. The main results obtained were follows : (1) The feature of mesocracks growth behavior has fractal characteristics. (2) Fractal dimension is raised with increasing the number of cyclic loadings. Thus, this characteristic of fractal dimension makes possible remaninig life assessment. (3) We design comlex system algolrithm which consists of damage process analysis, fractal modeling and simulating. Furthermore, this algorithm connects material design, structual design and prevenance maintemance.
一般社団法人日本機械学会の論文
1998-03-25