A fatigue life evaluation method for notched geometries considered the stress gradient concept

2021 ◽  
Author(s):  
Jiebin Shen ◽  
Haidong Fan ◽  
Jian Wang ◽  
Chuanli Yu ◽  
Zhiyong Huang
Keyword(s):  
Fatigue Life ◽  
Evaluation Method ◽  
Stress Gradient ◽  
Life Evaluation ◽  
Fatigue Life Evaluation

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

scholarly journals Fatigue Life Evaluation Considering Fatigue Reliability and Fatigue Crack for FV520B-I in VHCF Regime Based on Fracture Mechanics

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 371 ◽  
Author(s):  
Jinlong Wang ◽  
Yuxing Yang ◽  
Jing Yu ◽  
Jingsi Wang ◽  
Fengming Du ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Fracture Mechanics ◽  
Evaluation Method ◽  
Evaluation Model ◽  
Fatigue Cracking ◽  
High Strength ◽  
Fatigue Reliability ◽  
Life Evaluation ◽  
Fatigue Life Evaluation ◽  
Very High

This paper focuses on the fatigue reliability analysis and the development of a new life model of reliability and crack growth mechanisms in FV520B-I (high strength martensitic-type stainless steels) in the very-high cycle fatigue (VHCF) regime, which haven’t been studied well. First, the fatigue test was carried out to clarify the fatigue failure mechanism in the very-high cycle regime. Based on the test results and fatigue reliability theory, the fatigue life distribution and P-S-N curves were modeled. A new fatigue life evaluation model for FV520B-I is proposed according to the fracture mechanics and classic life evaluation method. With the comprehensive application of P-S-N curves and a new proposed fatigue life evaluation model, a new assumption of a P-Sc-N curve is developed and verified, to quantitatively express the relationship between fatigue life, reliability and fatigue cracking. This is novel and valuable for further fatigue study of FV520B-I.

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.

scholarly journals Fatigue Life Evaluation Method of Carbon Steel in High Temperature Pure Water Environment.

1999 ◽  
Vol 65 (634) ◽  
pp. 1370-1376 ◽  
Author(s):  
Atsuya HIRANO ◽  
Akihiko HIRANO ◽  
Satoshi KANNO ◽  
Michiyoshi YAMAMOTO ◽  
Makoto HAYASHI
Keyword(s):  
High Temperature ◽  
Fatigue Life ◽  
Carbon Steel ◽  
Evaluation Method ◽  
Pure Water ◽  
Water Environment ◽  
Life Evaluation ◽  
Fatigue Life Evaluation
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