Abstract
Researchers in the past have proposed several fatigue damage models to overcome the shortcomings of the commonly used Miner’s rule. However, requirements of material parameters or S-N curve modifications restricts their practical applications. Also, application of most of these models under variable amplitude loading conditions have not been found. To overcome these restrictions, a new fatigue damage model is proposed in this paper. The proposed model can be applied by practicing engineers using only the S-N curve given in the standard codes of practice. The model is verified with experimentally derived damage evolution curves for C 45 and 16 Mn and gives better agreement compared to previous models. The model predicted fatigue lives are also in better correlation with experimental results compared to previous models as shown in earlier published work by the authors. The proposed model is applied to welded joints subjected to variable amplitude loadings in this paper. The model given around 8% shorter fatigue lives compared to Eurocode given Miner’s rule. This shows the importance of applying accurate fatigue damage models for welded joints.
Highlights
Fatigue is one of the main causes of failures in both onshore and offshore steel structures subjected to variable amplitude loading (VAL) [1]
The model is verified with experimentally derived damage evolution curves for C 45 and 16 Mn and gives better agreement compared to previous models
It is concluded that the damage curves plotted using the proposed model are in good agreement with the available experimental data for two considered materials
Summary
- Vibration-induced fatigue life estimation of ball grid array packaging Mei-Ling Wu. - Gigacycle fatigue data sheets for advanced engineering materials Koji Yamaguchi, Takayuki Abe, Kazuo Kobayashi et al. This content was downloaded from IP address 152.94.247.251 on 11/04/2018 at 12:47
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