Cumulative damage model based on two-mode fatigue damage bounds

2009 ◽  
Vol 504 (1-2) ◽  
pp. 114-123 ◽  
Author(s):  
M. Ben-Amoz
Keyword(s):  
Fatigue Damage ◽  
Damage Model ◽  
Cumulative Damage ◽  
Model Based ◽  
Cumulative Damage Model

An improved nonlinear cumulative damage model for strength degradation considering loading sequence

2020 ◽  
pp. 105678952096486
Author(s):  
Changjie Jiang ◽  
Xintian Liu ◽  
Minghui Zhang ◽  
Xu Wang ◽  
Yansong Wang
Keyword(s):  
Fatigue Damage ◽  
Residual Life ◽  
Damage Model ◽  
Degradation Process ◽  
Strength Degradation ◽  
Cumulative Damage ◽  
Degradation Model ◽  
Cumulative Damage Model ◽  
Metal Materials ◽  
Loading Sequence

In order to determine the effect of different loads on fatigue damage, a strength degradation model is proposed according to the law of residual strength degradation of metal materials. The model is verified with the strength degradation test data, and the results show that the model can describe the strength degradation process of general metal materials well. Combined with the strength degradation model, an improved equivalent damage model for different loading sequences is proposed. On this basis, a nonlinear fatigue cumulative damage model based on strength degradation is derived. The cumulative damage model is applied to the estimation of fatigue residual life under two-, three-, and four-stage loads to investigate the effects of different loading sequence on fatigue damage under various loading conditions. Combining with experimental data, it is verified that the cumulative damage model can accurately estimate the fatigue life under two-, three-, and four-stage loads.

A Modified Cumulative Damage Model for Fatigue Life Prediction under Variable Amplitude Loadings

2016 ◽  
Vol 853 ◽  
pp. 62-66 ◽  
Author(s):  
Peng Yue ◽  
Qiang Lei ◽  
Cheng Lin Zhang ◽  
Shun Peng Zhu ◽  
Hong Zhong Huang
Keyword(s):  
Fatigue Damage ◽  
Life Prediction ◽  
Damage Accumulation ◽  
Damage Model ◽  
Cumulative Damage ◽  
Mean Stress ◽  
Stress Model ◽  
Proposed Model ◽  
Fatigue Damage Accumulation ◽  
Cumulative Damage Model

To evaluate the fatigue damage accumulation and predict the residual life of components at different stress levels, this paper proposed a modified cumulative damage model based on the strain energy density parameter. Noting that mean stress and load interaction under uniaxial fatigue loading exhibit significant effects on fatigue damage accumulation and life prediction. According to this, a new model based on damaged stress model which considers the effects of mean stress and load interaction was presented in this paper. The proposed model was verified by using four experimental data sets of aluminium alloys and steels. The experimental results are compared with those of the Miner’s rule, damaged stress model (DSM) and damaged energy model (DEM). Results show that the proposed model agrees better with the experimental observations than others.

Cumulative damage model based on equivalent fatigue under multiaxial thermomechanical random loading

2020 ◽  
Vol 43 (8) ◽  
pp. 1851-1868
Author(s):  
Luo‐Jin Li ◽  
De‐Guang Shang ◽  
Dao‐Hang Li ◽  
Long Xue ◽  
Xiao‐Dong Liu ◽  
...  
Keyword(s):  
Damage Model ◽  
Cumulative Damage ◽  
Random Loading ◽  
Model Based ◽  
Cumulative Damage Model
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