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Fatigue strength evaluation of perforated plate at elevated temperature using stress redistribution locus method

Watanabe, Osamu*; Bubphachopt, B.*; Kawasaki, Nobuchika ; Kasahara, Naoto

This study reports the effects of geometry on fatigue strength of the perforated plate at elevated temperature when SRL (Stress Redistribution Locus) Method is applied for the perforated plate with stress concentration. The test specimens made of SUS304 stainless steel are carried out by keeping temperature to be 550$$^{circ}$$C. The geometry of the perforated plate specimens are changed systematically by the number of holes and diameter size of the hole, where one or two holes are placed along the width direction, and the diameter is set to be from 2 mm to 8 mm. Both of the load and displacement are measured in all the cyclic history of the loadings to study the relation between crack initiation/propagation and the load decrease from the direct observation of crack at the holes side.

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