Assessment of failure life evaluation methods for structural discontinuities with fatigue and creep-fatigue tests on multiperforated plate made of Mod.9Cr-1Mo steel

Ando, Masanori ; Hirose, Yuichi*; Takano, Masahito*

This study compares and assesses the different fatigue and creep-fatigue life evaluation methods by performing tests of perforated plate made of Mod.9Cr-1Mo steel. Multi-perforated plate was subjected to mechanical cyclic loading at 550C, and crack initiation and propagation on the surfaces of the holes were observed. A series of finite element analyses were carried out to predict the number of cycles to failure by the several failure life evaluation methods, and these predictions were then compared with the test results. Several types of evaluation methods that use the elastic FEA were applied.