内外圧を受ける厚肉円筒の弾塑性応力集中の評価法 : 弾塑性領域における応力・ひずみ集中率の簡便推定法

概要

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A series of studies have been made by one of the present authors to develop a method of estimating the stress and strain at a notch root in the elastic-plastic range. In this paper, simple evaluation methods of elastic-plastic stress and strain concentration factors of pressurized cylinders were proposed on the basis of numerical analysis by a finite element method. In the case of small-scale yielding, the normarized stress concentration factor K^*_σ/K ^*_t and strain concentration factor K^*_ε/K ^*_t, of shallow and deep notched cylinders subjected to internal or external pressure were estimated with good accuracy by using the master curves as a function of a dimensionless parameter K ^*_tσ_n/σ_y. A limitation of the use of the master curves expressed in terms of the parameter K ^*_tσ_n/σ_y was also discussed.
一般社団法人日本機械学会の論文
2001-06-25