 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 12854 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8044
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| In English (Mech. Solids): | | 4810 |
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| Xu Xu, Qiwen Xue, and Yiqian He, "A Corten-Dolan Model Considering Material Strength Degradation," Mech. Solids. 57 (1), 149-162 (2022) |
| Year |
2022 |
Volume |
57 |
Number |
1 |
Pages |
149-162 |
| DOI |
10.3103/S002565442201006X |
| Title |
A Corten-Dolan Model Considering Material Strength Degradation |
| Author(s) |
Xu Xu (School of Civil Engineering, Dalian Jiaotong University, Liaoning Dalian, 116028 China; State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Liaoning Dalian, 116024 China)
Qiwen Xue (School of Civil Engineering, Dalian Jiaotong University, Liaoning Dalian, 116028 China; State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Liaoning Dalian, 116024 China, xueqiwen@djtu.edu.cn)
Yiqian He (State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Liaoning Dalian, 116024 China) |
| Abstract |
Based on the Corten-Dolan model and the law of material residual strength degradation, a new nonlinear fatigue accumulation damage model is established. Combining the traditional material residual strength degradation model with the equivalent damage law, a material residual strength model suitable for variable amplitude loading is established. Subsequently, based on the above residual strength model, the material residual strength attenuation coefficient is constructed by using the ratio of material residual strength to initial strength, and it is introduced into the traditional Corten-Dolan model and its key parameter d to improve the model. The proposed model can not only consider the influence of residual strength on damage accumulation, but fully consider the influence of small load, stress state and damage degree as well. According to the test data of aluminum alloy 7070-T7451, titanium alloy Ti-6Al-4V, ductile iron GS61, 45 steel, 16Mn steel, and aluminum alloy welded joints, it is verified that compared with the traditional Corten-Dolan model, the established model has higher accuracy in fatigue life prediction under two-level block loading or multi-level block loading. The proposed model can better calculate the fatigue life of metal materials under multi-level variable amplitude loading and the mathematical expression is relatively simple and has strong engineering practicability. |
| Keywords |
small load, residual strength, corten-dolan model, fatigue life prediction, nonlinear damage accumulation model |
| Received |
30 July 2021 | Revised |
17 September 2021 | Accepted |
18 September 2021 |
| Link to Fulltext |
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