An Integral Formulation of Two-Parameter Fatigue Crack Growth Model
A two-parameter fatigue crack growth algorithm in integral form is proposed, which can describe the continuous crack growth process over the time period. In this model, the fatigue crack propagation behavior is governed by the temporal crack-tip state including the current applied load and the physi...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/8707929 |
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| _version_ | 1832545506111258624 |
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| author | Jianguo Wu Shan Jiang Wei Zhang Zili Wang |
| author_facet | Jianguo Wu Shan Jiang Wei Zhang Zili Wang |
| author_sort | Jianguo Wu |
| collection | DOAJ |
| description | A two-parameter fatigue crack growth algorithm in integral form is proposed, which can describe the continuous crack growth process over the time period. In this model, the fatigue crack propagation behavior is governed by the temporal crack-tip state including the current applied load and the physical condition due to the previous load sequence. The plasticity-induced crack closure, left by the historical loading sequence, controls the following fatigue crack growth behavior and typically leads to the interaction effects. In the proposed method, a modified crack closure model deriving from the local plastic deformation is employed to account for this load memory effect. In general, this model can simulate the fatigue crack growth under variable amplitude loading. Additionally, this model is established on the physical state of crack tip in the small spatial and temporal scale, and it is used to evaluate the macroscopic crack propagation and fatigue life under irregular tension-tension loading. A special superimposed loading case is discussed to demonstrate the advantage of the proposed model, while the traditional two-parameter approach is not proper functional. Moreover, the typical various load spectra are also employed to validate the method. Good agreements are observed. |
| format | Article |
| id | doaj-art-52921592536b46b299eda7d7bbc0c983 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-52921592536b46b299eda7d7bbc0c9832025-02-03T07:25:34ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/87079298707929An Integral Formulation of Two-Parameter Fatigue Crack Growth ModelJianguo Wu0Shan Jiang1Wei Zhang2Zili Wang3Science and Technology on Reliability and Environmental Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing, ChinaScience and Technology on Reliability and Environmental Engineering Laboratory, School of Reliability and Systems Engineering, Beihang University, Beijing, ChinaScience and Technology on Reliability and Environmental Engineering Laboratory, School of Reliability and Systems Engineering, Beihang University, Beijing, ChinaScience and Technology on Reliability and Environmental Engineering Laboratory, School of Reliability and Systems Engineering, Beihang University, Beijing, ChinaA two-parameter fatigue crack growth algorithm in integral form is proposed, which can describe the continuous crack growth process over the time period. In this model, the fatigue crack propagation behavior is governed by the temporal crack-tip state including the current applied load and the physical condition due to the previous load sequence. The plasticity-induced crack closure, left by the historical loading sequence, controls the following fatigue crack growth behavior and typically leads to the interaction effects. In the proposed method, a modified crack closure model deriving from the local plastic deformation is employed to account for this load memory effect. In general, this model can simulate the fatigue crack growth under variable amplitude loading. Additionally, this model is established on the physical state of crack tip in the small spatial and temporal scale, and it is used to evaluate the macroscopic crack propagation and fatigue life under irregular tension-tension loading. A special superimposed loading case is discussed to demonstrate the advantage of the proposed model, while the traditional two-parameter approach is not proper functional. Moreover, the typical various load spectra are also employed to validate the method. Good agreements are observed.http://dx.doi.org/10.1155/2018/8707929 |
| spellingShingle | Jianguo Wu Shan Jiang Wei Zhang Zili Wang An Integral Formulation of Two-Parameter Fatigue Crack Growth Model Advances in Materials Science and Engineering |
| title | An Integral Formulation of Two-Parameter Fatigue Crack Growth Model |
| title_full | An Integral Formulation of Two-Parameter Fatigue Crack Growth Model |
| title_fullStr | An Integral Formulation of Two-Parameter Fatigue Crack Growth Model |
| title_full_unstemmed | An Integral Formulation of Two-Parameter Fatigue Crack Growth Model |
| title_short | An Integral Formulation of Two-Parameter Fatigue Crack Growth Model |
| title_sort | integral formulation of two parameter fatigue crack growth model |
| url | http://dx.doi.org/10.1155/2018/8707929 |
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