A Novel Methodology for Calculating Crack Opening Stress under Tension-Compression Cyclic Load
Crack closure model has been used in several applications on the prediction of fatigue crack growth life, with expression of crack opening stress often serving as milestones. A typical difficulty in calculating the crack opening stress is the phenomenon of crack closure caused by the compressive loa...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/1711803 |
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| author | Lin Zhang Xiaohui Wei |
| author_facet | Lin Zhang Xiaohui Wei |
| author_sort | Lin Zhang |
| collection | DOAJ |
| description | Crack closure model has been used in several applications on the prediction of fatigue crack growth life, with expression of crack opening stress often serving as milestones. A typical difficulty in calculating the crack opening stress is the phenomenon of crack closure caused by the compressive load effect. Compressive load effect, resulting in the change of residual stress status at the unloading stage and the decrease of crack opening stress, is a long-term challenge for predicting fatigue crack growth life. We propose the expression of crack opening stress to predict fatigue crack growth life based on the analysis of compact tensile specimen with elastoplastic element method. It combines the characteristics of material and load to deal with the phenomenon of crack closure and uses stress ratio and normalized maximum applied load variable to construct the expression of crack opening stress. In the study of tensile-compression fatigue crack growth experiments, the proposed expression is proved to improve, by comparative analysis, the predictive ability on the whole range of experiment data. The novel expression is accurate and simple. Consequently, it is conducive to calculate the crack opening stress under tension-compression load. |
| format | Article |
| id | doaj-art-0e3dcb529c4a4738b746dd49519e749b |
| institution | Kabale University |
| issn | 1687-8442 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-0e3dcb529c4a4738b746dd49519e749b2025-02-03T05:43:34ZengWileyAdvances in Materials Science and Engineering1687-84422021-01-01202110.1155/2021/1711803A Novel Methodology for Calculating Crack Opening Stress under Tension-Compression Cyclic LoadLin Zhang0Xiaohui Wei1Key Laboratory of Fundamental Science for National Defense–Advanced Design Technology of Flight VehicleKey Laboratory of Fundamental Science for National Defense–Advanced Design Technology of Flight VehicleCrack closure model has been used in several applications on the prediction of fatigue crack growth life, with expression of crack opening stress often serving as milestones. A typical difficulty in calculating the crack opening stress is the phenomenon of crack closure caused by the compressive load effect. Compressive load effect, resulting in the change of residual stress status at the unloading stage and the decrease of crack opening stress, is a long-term challenge for predicting fatigue crack growth life. We propose the expression of crack opening stress to predict fatigue crack growth life based on the analysis of compact tensile specimen with elastoplastic element method. It combines the characteristics of material and load to deal with the phenomenon of crack closure and uses stress ratio and normalized maximum applied load variable to construct the expression of crack opening stress. In the study of tensile-compression fatigue crack growth experiments, the proposed expression is proved to improve, by comparative analysis, the predictive ability on the whole range of experiment data. The novel expression is accurate and simple. Consequently, it is conducive to calculate the crack opening stress under tension-compression load.http://dx.doi.org/10.1155/2021/1711803 |
| spellingShingle | Lin Zhang Xiaohui Wei A Novel Methodology for Calculating Crack Opening Stress under Tension-Compression Cyclic Load Advances in Materials Science and Engineering |
| title | A Novel Methodology for Calculating Crack Opening Stress under Tension-Compression Cyclic Load |
| title_full | A Novel Methodology for Calculating Crack Opening Stress under Tension-Compression Cyclic Load |
| title_fullStr | A Novel Methodology for Calculating Crack Opening Stress under Tension-Compression Cyclic Load |
| title_full_unstemmed | A Novel Methodology for Calculating Crack Opening Stress under Tension-Compression Cyclic Load |
| title_short | A Novel Methodology for Calculating Crack Opening Stress under Tension-Compression Cyclic Load |
| title_sort | novel methodology for calculating crack opening stress under tension compression cyclic load |
| url | http://dx.doi.org/10.1155/2021/1711803 |
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