The low-cycle fatigue property, damage mechanism and life prediction of compacted graphite iron: Influence of strain rate

2020 ◽  
Vol 135 ◽  
pp. 105576 ◽  
Author(s):  
C.L. Zou ◽  
J.C. Pang ◽  
L.J. Chen ◽  
S.X. Li ◽  
Z.F. Zhang
Keyword(s):  
Strain Rate ◽  
Life Prediction ◽  
Low Cycle Fatigue ◽  
Fatigue Property ◽  
Damage Mechanism ◽  
Compacted Graphite Iron ◽  
Cycle Fatigue ◽  
Property Damage ◽  
Compacted Graphite

A weight function method for multiaxial low-cycle fatigue life prediction under variable amplitude loading

2018 ◽  
Vol 53 (4) ◽  
pp. 197-209 ◽  
Author(s):  
Xiao-Wei Wang ◽  
De-Guang Shang ◽  
Yu-Juan Sun
Keyword(s):  
Fatigue Life ◽  
Weight Function ◽  
Life Prediction ◽  
Function Method ◽  
Low Cycle Fatigue ◽  
Fatigue Life Prediction ◽  
Cycle Fatigue ◽  
Critical Plane ◽  
Variable Amplitude ◽  
Weight Function Method

A weight function method based on strain parameters is proposed to determine the critical plane in low-cycle fatigue region under both constant and variable amplitude tension–torsion loadings. The critical plane is defined by the weighted mean maximum absolute shear strain plane. Combined with the critical plane determined by the proposed method, strain-based fatigue life prediction models and Wang-Brown’s multiaxial cycle counting method are employed to predict the fatigue life. The experimental critical plane orientation and fatigue life data under constant and variable amplitude tension–torsion loadings are used to verify the proposed method. The results show that the proposed method is appropriate to determine the critical plane under both constant and variable amplitude loadings.

LOW CYCLE FATIGUE BEHAVIOR AND LIFE PREDICTION OF A CAST COBALT-BASED SUPERALLOY

2012 ◽  
Vol 06 ◽  
pp. 251-256
Author(s):  
HO-YOUNG YANG ◽  
JAE-HOON KIM ◽  
KEUN-BONG YOO
Keyword(s):  
Fatigue Life ◽  
Strain Energy ◽  
Life Prediction ◽  
Prediction Models ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Total Strain ◽  
Cycle Fatigue ◽  
Total Strain Range ◽  
Different Temperatures

Co -base superalloys have been applied in the stationary components of gas turbine owing to their excellent high temperature properties. Low cycle fatigue data on ECY-768 reported in a companion paper were used to evaluate fatigue life prediction models. In this study, low cycle fatigue tests are performed as the variables of total strain range and temperatures. The relations between plastic and total strain energy densities and number of cycles to failure are examined in order to predict the low cycle fatigue life of Cobalt-based super alloy at different temperatures. The fatigue lives is evaluated using predicted by Coffin-Manson method and strain energy methods is compared with the measured fatigue lives at different temperatures. The microstructure observing was performed for how affect able to low-cycle fatigue life by increasing the temperature.

Low cycle fatigue property and fracture behavior of low yield point steels

2018 ◽  
Vol 165 ◽  
pp. 688-696 ◽  
Author(s):  
Lu Yang ◽  
Yang Gao ◽  
Gang Shi ◽  
Xun Wang ◽  
Yu Bai
Keyword(s):  
Yield Point ◽  
Fracture Behavior ◽  
Low Cycle Fatigue ◽  
Fatigue Property ◽  
Cycle Fatigue
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