scholarly journals Fatigue Life Prediction and Ratcheting behavior of the Elbrodur-NIB under Fatigue loading with mean stress

2011 ◽  
Vol 39 (7) ◽  
pp. 612-617 ◽  
Author(s):  
Chang-Bum Lim
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Fatigue Loading ◽  
Fatigue Life Prediction ◽  
Mean Stress

Study on effect of mean stress on fatigue life prediction of thin film structure

2016 ◽  
Vol 30 (4) ◽  
pp. 1547-1554 ◽  
Author(s):  
Myung-Soo Shin ◽  
Jun-Hyub Park ◽  
Jung Yup Kim
Keyword(s):  
Thin Film ◽  
Fatigue Life ◽  
Life Prediction ◽  
Film Structure ◽  
Fatigue Life Prediction ◽  
Mean Stress ◽  
Thin Film Structure

scholarly journals Application of Life-Dependent Material Parameters to Fatigue Life Prediction under Multiaxial and Non-Zero Mean Loading

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1587 ◽  
Author(s):  
Krzysztof Kluger ◽  
Aleksander Karolczuk ◽  
Szymon Derda
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Fatigue Loading ◽  
Mean Value ◽  
Multiaxial Fatigue ◽  
Fatigue Life Prediction ◽  
Test Results ◽  
Material Parameters ◽  
Fixed Material ◽  
Stress Ratios

This study presents the life-dependent material parameters concept as applied to several well-known fatigue models for the purpose of life prediction under multiaxial and non-zero mean loading. The necessity of replacing the fixed material parameters with life-dependent parameters is demonstrated. The aim of the research here is verification of the life-dependent material parameters concept when applied to multiaxial fatigue loading with non-zero mean stress. The verification is performed with new experimental fatigue test results on a 7075-T651 aluminium alloy and S355 steel subjected to multiaxial cyclic bending and torsion loading under stress ratios equal to R = −0.5 and 0.0, respectively. The received results exhibit the significant effect of the non-zero mean value of shear stress on the fatigue life of S355 steel. The prediction of fatigue life was improved when using the life-dependent material parameters compared to the fixed material parameters.

Validation of Fatigue Life Prediction Method under Variable Fatigue Loading for CFRP Laminates

2010 ◽  
Vol 17 (4) ◽  
pp. 261-270
Author(s):  
Yuichiro Hanatani, ◽  
Masayuki Nakada, ◽  
Yasushi Miyano,
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Prediction Method ◽  
Fatigue Loading ◽  
Fatigue Life Prediction ◽  
Cfrp Laminates

Fatigue-life prediction under irregular stress conditions

1970 ◽  
Vol 5 (3) ◽  
pp. 207-211 ◽  
Author(s):  
T H Erismann
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Stress Conditions ◽  
Fatigue Life Prediction ◽  
Mean Stress ◽  
Arbitrary Loading ◽  
Empirical Determination ◽  
The Mean ◽  
Standard Tests

The present work is a shorter version of a more detailed treatise by the author (1)∗. The method consists of two parts: the empirical determination of certain characteristics of a material by means of a relatively small number of well defined standard tests, and the arithmetical application of the results obtained to arbitrary loading histories. The following groups of parameters are thus taken into account: the variations of the mean stress; the interaction of these variations and the superposed oscillating stresses; the spectrum of the oscillating-stress amplitudes; the sequence of the oscillating-stress amplitudes.

Mean stress and ratcheting corrections in fatigue life prediction of metals

2017 ◽  
Vol 40 (9) ◽  
pp. 1343-1354 ◽  
Author(s):  
S. P. Zhu ◽  
Q. Lei ◽  
Q. Y. Wang
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Fatigue Life Prediction ◽  
Mean Stress

FATIGUE LIFE PREDICTION OF ROLLED AZ31 MAGNESIUM ALLOY USING AN ENERGY-BASED MODEL

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5503-5508 ◽  
Author(s):  
SUNG HYUK PARK ◽  
SEONG-GU HONG ◽  
BYOUNG HO LEE ◽  
CHONG SOO LEE
Keyword(s):  
Fatigue Life ◽  
Magnesium Alloy ◽  
Deformation Behavior ◽  
Strain Energy ◽  
Life Prediction ◽  
Fatigue Life Prediction ◽  
Az31 Magnesium Alloy ◽  
Stress And Strain ◽  
Mean Stress ◽  
The Mean

Fatigue behavior of rolled AZ31 magnesium alloy, which shows an anisotropic deformation behavior due to the direction dependent formation of deformation twins, was investigated by carrying out stress and strain controlled fatigue tests. The anisotropy in deformation behavior introduced asymmetric stress-strain hysteresis hoops, which make it difficult to use common fatigue life prediction models, such as stress and strain-based models, and induced mean stress and/or strain even under fully-reversed conditions; the tensile mean stress and strain were found to have a harmful effect on the fatigue resistance. An energy-based model was used to describe the fatigue life behavior as strain energy density was stabilized at the early stage of fatigue life and nearly invariant through entire life. To account for the mean stress and strain effects, an elastic energy related to the mean stress and a plastic strain energy consumed by the mean strain were appropriately considered in the model. The results showed that there is good agreement between the prediction and the experimental data.

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