A Modified Nonlinear Damage Accumulation Model for Fatigue Life Prediction Considering Load Interaction Effects
Many structures are subjected to variable amplitude loading in engineering practice. The foundation of fatigue life prediction under variable amplitude loading is how to deal with the fatigue damage accumulation. A nonlinear fatigue damage accumulation model to consider the effects of load sequences...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/164378 |
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| author | Huiying Gao Hong-Zhong Huang Shun-Peng Zhu Yan-Feng Li Rong Yuan |
| author_facet | Huiying Gao Hong-Zhong Huang Shun-Peng Zhu Yan-Feng Li Rong Yuan |
| author_sort | Huiying Gao |
| collection | DOAJ |
| description | Many structures are subjected to variable amplitude loading in engineering practice. The foundation of fatigue life prediction under variable amplitude loading is how to deal with the fatigue damage accumulation. A nonlinear fatigue damage accumulation model to consider the effects of load sequences was proposed in earlier literature, but the model cannot consider the load interaction effects, and sometimes it makes a major error. A modified nonlinear damage accumulation model is proposed in this paper to account for the load interaction effects. Experimental data of two metallic materials are used to validate the proposed model. The agreement between the model prediction and experimental data is observed, and the predictions by proposed model are more possibly in accordance with experimental data than that by primary model and Miner’s rule. Comparison between the predicted cumulative damage by the proposed model and an existing model shows that the proposed model predictions can meet the accuracy requirement of the engineering project and it can be used to predict the fatigue life of welded aluminum alloy joint of Electric Multiple Units (EMU); meanwhile, the accuracy of approximation can be obtained from the proposed model though more simple computing process and less material parameters calling for extensive testing than the existing model. |
| format | Article |
| id | doaj-art-c7b74d2058e84209a1af0fc7c43b8d85 |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-c7b74d2058e84209a1af0fc7c43b8d852025-02-03T05:52:20ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/164378164378A Modified Nonlinear Damage Accumulation Model for Fatigue Life Prediction Considering Load Interaction EffectsHuiying Gao0Hong-Zhong Huang1Shun-Peng Zhu2Yan-Feng Li3Rong Yuan4School of Mechanical, Electronic, and Industrial Engineering, University of Electronic Science and Technology of China, No. 2006, Xiyuan Avenue, West Hi-Tech Zone, Chengdu, Sichuan 611731, ChinaSchool of Mechanical, Electronic, and Industrial Engineering, University of Electronic Science and Technology of China, No. 2006, Xiyuan Avenue, West Hi-Tech Zone, Chengdu, Sichuan 611731, ChinaSchool of Mechanical, Electronic, and Industrial Engineering, University of Electronic Science and Technology of China, No. 2006, Xiyuan Avenue, West Hi-Tech Zone, Chengdu, Sichuan 611731, ChinaSchool of Mechanical, Electronic, and Industrial Engineering, University of Electronic Science and Technology of China, No. 2006, Xiyuan Avenue, West Hi-Tech Zone, Chengdu, Sichuan 611731, ChinaSchool of Mechanical, Electronic, and Industrial Engineering, University of Electronic Science and Technology of China, No. 2006, Xiyuan Avenue, West Hi-Tech Zone, Chengdu, Sichuan 611731, ChinaMany structures are subjected to variable amplitude loading in engineering practice. The foundation of fatigue life prediction under variable amplitude loading is how to deal with the fatigue damage accumulation. A nonlinear fatigue damage accumulation model to consider the effects of load sequences was proposed in earlier literature, but the model cannot consider the load interaction effects, and sometimes it makes a major error. A modified nonlinear damage accumulation model is proposed in this paper to account for the load interaction effects. Experimental data of two metallic materials are used to validate the proposed model. The agreement between the model prediction and experimental data is observed, and the predictions by proposed model are more possibly in accordance with experimental data than that by primary model and Miner’s rule. Comparison between the predicted cumulative damage by the proposed model and an existing model shows that the proposed model predictions can meet the accuracy requirement of the engineering project and it can be used to predict the fatigue life of welded aluminum alloy joint of Electric Multiple Units (EMU); meanwhile, the accuracy of approximation can be obtained from the proposed model though more simple computing process and less material parameters calling for extensive testing than the existing model.http://dx.doi.org/10.1155/2014/164378 |
| spellingShingle | Huiying Gao Hong-Zhong Huang Shun-Peng Zhu Yan-Feng Li Rong Yuan A Modified Nonlinear Damage Accumulation Model for Fatigue Life Prediction Considering Load Interaction Effects The Scientific World Journal |
| title | A Modified Nonlinear Damage Accumulation Model for Fatigue Life Prediction Considering Load Interaction Effects |
| title_full | A Modified Nonlinear Damage Accumulation Model for Fatigue Life Prediction Considering Load Interaction Effects |
| title_fullStr | A Modified Nonlinear Damage Accumulation Model for Fatigue Life Prediction Considering Load Interaction Effects |
| title_full_unstemmed | A Modified Nonlinear Damage Accumulation Model for Fatigue Life Prediction Considering Load Interaction Effects |
| title_short | A Modified Nonlinear Damage Accumulation Model for Fatigue Life Prediction Considering Load Interaction Effects |
| title_sort | modified nonlinear damage accumulation model for fatigue life prediction considering load interaction effects |
| url | http://dx.doi.org/10.1155/2014/164378 |
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