Experimental Study on Accuracy of Notch Root Strain Evaluation Equation of ASME B & PV C.C. N-47

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  • ＡＳＭＥＢ　＆　ＰＶＣ．Ｃ．Ｎ‐４７の切欠き底ひずみ推定式の精度に関する研究
  • ASME BPV C C N 47 ノ セツフキ テイ ヒズミ スイテイシキ

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Abstract

This paper describes the test results on strain concentration behaviour of type 304 stainless steel and 21/4Cr-1Mo steel. Type 304 stainless steel was tested at 600°C under cyclic displacement control and cyclic load control conditions, and 21/4Cr-1Mo steel was tested at 500°C under static creep condition. An improved fine grating method was developed for this study utilizing photo spots in the indentations made by Vicker's hardness tester. The results of stain measurements were compared with the predictions by the equation given in ASME Code Case N-47 and the structural design guide for Japanese fast breader reactor. The equation was proved to give a conservative prediction.

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