Local stress–strain field intensity approach to fatigue life prediction under random cyclic loading

2001 ◽  
Vol 23 (10) ◽  
pp. 903-910 ◽  
Author(s):  
D Shang
Keyword(s):  
Fatigue Life ◽  
Cyclic Loading ◽  
Field Intensity ◽  
Strain Field ◽  
Life Prediction ◽  
Local Stress ◽  
Fatigue Life Prediction ◽  
Stress Strain

Predication of Fatigue Life of Notched Torus under Random Scan Vibration

2010 ◽  
Vol 638-642 ◽  
pp. 3870-3875
Author(s):  
You Tang Li ◽  
Chang Feng Yan ◽  
Wu Yin Jin
Keyword(s):  
Fatigue Life ◽  
Field Intensity ◽  
Strain Field ◽  
Yield Criterion ◽  
Local Stress ◽  
Field Method ◽  
Cyclic Stress ◽  
Random Load ◽  
Stress Strain ◽  
Plastic Properties

The fatigue life of notched torus under random scan vibration is discussed in this paper. The stress function and stress field intensity of the materials under composted cyclic stress are analyzed. The experiments of vibration of the notched torus under random load are made in the digital vibration equipment. The fatigue life of notched torus is predicted by use the local stress-strain field method and three parameters formula. The elasto-plastic properties of the material are described by Von Mises yield criterion and stress-strain of uniaxial cyclic loading. The field of local fatigue damage of notched torus under random vibration is determined by using the method of local stress-strain field intensity, and the cycle stress-strain response near the tip of notch is obtained. The revised factor of fatigue life of LY12-CZ material is determined, the relationship between high-frequency cycle of stress and fatigue life is set up by use three parameters formula, and the fatigue life of the notched torus is obtained.

Bending Fatigue Life Prediction of Fillet Rolled Crankshafts

2013 ◽  
Vol 275-277 ◽  
pp. 174-178 ◽  
Author(s):  
Ke Bao ◽  
Ri Dong Liao
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Three Dimensional ◽  
Local Stress ◽  
Fatigue Tests ◽  
Fatigue Life Prediction ◽  
Stress Strain ◽  
Bending Fatigue ◽  
Bending Strain ◽  
Stress Computation

The influence of residual stesses must be considered in bending fatigue life prediction of fillet rolling crankshafts. In this paper, the stress/strain distributions near fillet during fatigue tests are calculated by finite element method. In residual stress computation, the three dimensional flexible contact model is adopted, and in bending strain computation, the static analysis are selected. Then, bending fatigue life prediction is performed by local stress-strain approach based on the residual stess and bending strain amplitude, and the results agree with the bending fatigue test.

scholarly journals Fatigue Life Prediction of High Modulus Asphalt Concrete Based on the Local Stress-Strain Method

2017 ◽  
Vol 7 (3) ◽  
pp. 305 ◽  
Author(s):  
Mulian Zheng ◽  
Peng Li ◽  
Jiangang Yang ◽  
Hongyin Li ◽  
Yangyang Qiu ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Asphalt Concrete ◽  
Life Prediction ◽  
Local Stress ◽  
Fatigue Life Prediction ◽  
High Modulus ◽  
Stress Strain ◽  
Strain Method

An Application of Incremental Plasticity Theory to Fatigue Life Prediction of Steels

1991 ◽  
Vol 113 (4) ◽  
pp. 404-410 ◽  
Author(s):  
W. R. Chen ◽  
L. M. Keer
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Kinematic Hardening ◽  
Yield Condition ◽  
Strain Curve ◽  
Fatigue Life Prediction ◽  
304 Stainless Steel ◽  
Flow Rule ◽  
Stress Strain ◽  
Von Mises

An incremental plasticity model is proposed based on the von-Mises yield condition, associated flow rule, and nonlinear kinematic hardening rule. In the present model, fatigue life prediction requires only the uniaxial cycle stress-strain curve and the uniaxial fatigue test results on smooth specimens. Experimental data of 304 stainless steel and 1045 carbon steel were used to validate this analytical model. It is shown that a reasonable description of steady-state hysteresis stress-strain loops and prediction of fatigue lives under various combined axial-torsional loadings are given by this model

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