scholarly journals Proposal of Creep-Fatigue Life Evaluation Method for Ferritic Alloy Steels.

1994 ◽  
Vol 60 (577) ◽  
pp. 2054-2060 ◽  
Author(s):  
Takashi Ogata ◽  
Akito Nitta
Keyword(s):  
Fatigue Life ◽  
Evaluation Method ◽  
Ferritic Alloy ◽  
Life Evaluation ◽  
Creep Fatigue ◽  
Alloy Steels ◽  
Fatigue Life Evaluation

Fatigue and Creep-Fatigue Life Evaluation of U-Shaped Bellows

1992 ◽  
Vol 114 (3) ◽  
pp. 280-291 ◽  
Author(s):  
K. Tsukimori ◽  
T. Yamashita ◽  
M. Kikuchi ◽  
K. Iwata ◽  
A. Imazu
Keyword(s):  
Fatigue Life ◽  
Evaluation Method ◽  
Strain Range ◽  
Creep Damage ◽  
Fatigue Tests ◽  
Reliable Operation ◽  
Life Evaluation ◽  
Creep Fatigue ◽  
Fatigue Life Evaluation ◽  
Rational Evaluation

For the reliable operation of bellows under cyclic loadings at high temperatures, a rational evaluation method of life of bellows would be needed. Authors investigated simplified analysis methods for fatigue and creep-fatigue life prediction of U-shaped bellows considering inelasticity as well as various geometrical nonuniformity such as thickness and shape of convolutions. A conservative evaluation method of the strain range is developed, introducing three strain range amplification factors for nominal elastic strain range. Creep and relaxation behaviors of bellows are studied. Consequently, a new evaluation method of creep damage fractions is proposed which depends upon the relation between primary and secondary stresses. Fatigue and creep-fatigue tests are conducted and the validity of the present methods is discussed.

Development of fatigue life evaluation method using small specimen

2013 ◽  
Vol 441 (1-3) ◽  
pp. 125-132 ◽  
Author(s):  
Shuhei Nogami ◽  
Arata Nishimura ◽  
Eichi Wakai ◽  
Hiroyasu Tanigawa ◽  
Takamoto Itoh ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Evaluation Method ◽  
Small Specimen ◽  
Life Evaluation ◽  
Fatigue Life Evaluation
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