Fatigue of structural plywood under cyclic shear through thickness II: a new method for fatigue life prediction

2007 ◽  
Vol 53 (4) ◽  
pp. 303-308 ◽  
Author(s):  
Takanori Sugimoto ◽  
Yasutoshi Sasaki ◽  
Mariko Yamasaki
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Fatigue Life Prediction ◽  
New Method ◽  
Cyclic Shear ◽  
Shear Through Thickness

A Damage Mechanics-Based Fatigue Life Prediction Model for Solder Joints

2003 ◽  
Vol 125 (1) ◽  
pp. 120-125 ◽  
Author(s):  
Hong Tang ◽  
Cemal Basaran
Keyword(s):  
Fatigue Life ◽  
Prediction Model ◽  
Life Prediction ◽  
Damage Mechanics ◽  
Solder Joints ◽  
Experimental Results ◽  
Fatigue Life Prediction ◽  
Isotropic Hardening ◽  
Cyclic Shear ◽  
Life Prediction Model

A thermomechanical fatigue life prediction model based on the theory of damage mechanics is presented. The damage evolution, corresponding to the material degradation under cyclic thermomechanical loading, is quantified thermodynamic framework. The damage, as an internal state variable, is coupled with unified viscoplastic constitutive model to characterize the response of solder alloys. The damage-coupled viscoplastic model with kinematic and isotropic hardening is implemented in ABAQUS finite element package to simulate the cyclic softening behavior of solder joints. Several computational simulations of uniaxial monotonic tensile and cyclic shear tests are conducted to validate the model with experimental results. The behavior of an actual ball grid array (BGA) package under thermal fatigue loading is also simulated and compared with experimental results.

A new method for fatigue life prediction based on the Thick Level Set approach

2017 ◽  
Vol 182 ◽  
pp. 449-466 ◽  
Author(s):  
L.O. Voormeeren ◽  
F.P. van der Meer ◽  
J. Maljaars ◽  
L.J. Sluys
Keyword(s):  
Fatigue Life ◽  
Level Set ◽  
Life Prediction ◽  
Fatigue Life Prediction ◽  
New Method ◽  
Level Set Approach

A New Method of Stress Calculation in Spot Welded Joint and Its Application to Fatigue Life Prediction of Actual Vehicle

2003 ◽  
Author(s):  
Kazuhiro Seto ◽  
Eisuke Nakayama ◽  
Koichi Tsunoda ◽  
Nobuhiro Fujita ◽  
Yuichi Yoshida ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Welded Joint ◽  
Fatigue Life Prediction ◽  
New Method ◽  
Stress Calculation ◽  
Spot Welded

A New Nonproportional Low Cycle Fatigue Life Prediction Method for Type 304 Stainless Steel

2019 ◽  
Vol 141 (2) ◽  
Author(s):  
Bowen Liu ◽  
Xiangqiao Yan
Keyword(s):  
Stainless Steel ◽  
Fatigue Life ◽  
Life Prediction ◽  
Low Cycle Fatigue ◽  
Prediction Method ◽  
Fatigue Life Prediction ◽  
New Method ◽  
304 Stainless Steel ◽  
Loading Path ◽  
Prediction Approach

A new method is put forward to predict fatigue life for low cycle nonproportional loading based on the Itoh criterion. The proposed method considers the multi-axiality influence on the reference maximum principal strain path and the calculation of nonproportionality factor Fnp by utilizing a multi-axial fatigue life prediction approach based on the modified Wöhler curve method. Different from the hypothesis of previous integral models for computing factor Fnp where the loading path is considered uniform, a new model using an inhomogeneous integral is presented and a path-dependent weight factor is defined to describe this inhomogeneity. The experimental tests of Itoh on 304 stainless steel with 14 different loading cases are referenced to examine the validity of the new method.

Fatigue Life Prediction Based on Strengthening and Damaging

2011 ◽  
Vol 130-134 ◽  
pp. 3148-3150
Author(s):  
Li Song ◽  
Xi Lu
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Prediction Models ◽  
Fatigue Life Prediction ◽  
New Method ◽  
Random Loading ◽  
Vehicle Component ◽  
Miner’S Rule ◽  
Miner's Rule

Based on moving S-N curve, a new method of fatigue life prediction for vehicle component in random loading spectra was put forward. In the new method, both strengthening and damaging of loads are fully considered in fatigue life prediction of vehicle component. The results of fatigue life prediction showed that the new method was more exacter than that of other life prediction models, such as Miner's rule, modified Miner's rule, Manson's bilinear theory and Corten-Dolan's theory. Only this new method could exactly predict the fatigue life of vehicle component in original or slightly strengthened loading spectra.

Study and Application of Grey System Theory for Fatigue Life Prediction

2009 ◽  
Vol 413-414 ◽  
pp. 717-724 ◽  
Author(s):  
Xu Liang Wang ◽  
Hong Nie ◽  
Quan Jiang
Keyword(s):  
System Theory ◽  
Fatigue Life ◽  
Prediction Error ◽  
Life Prediction ◽  
Grey System Theory ◽  
Fatigue Life Prediction ◽  
New Method ◽  
Grey Model ◽  
Grey System ◽  
Safe Side

The complexity of fatigue phenomenon results in the difficulty of fatigue life prediction. The fatigue phenomenon is treated as being in a grey system. By using of grey system theory, a new method for fatigue life prediction based on grey model GM(1,1) is proposed. Results of the example show that the prediction error can be reduced from 61.55% to 24.32%, and the prediction is on the safe side. Therefore, it is proved that the method is practical and useful for fatigue life prediction in engineering.

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