Fatigue Crack Growth Analysis under Constant Amplitude Loading Using Finite Element Method
Damage tolerant design relies on accurately predicting the growth rate and path of fatigue cracks under constant and variable amplitude loading. ANSYS Mechanical R19.2 was used to perform a numerical analysis of fatigue crack growth assuming a linear elastic and isotropic material subjected to const...
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MDPI AG
2022-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/8/2937 |
| _version_ | 1797445122483290112 |
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| author | Abdulnaser M. Alshoaibi |
| author_facet | Abdulnaser M. Alshoaibi |
| author_sort | Abdulnaser M. Alshoaibi |
| collection | DOAJ |
| description | Damage tolerant design relies on accurately predicting the growth rate and path of fatigue cracks under constant and variable amplitude loading. ANSYS Mechanical R19.2 was used to perform a numerical analysis of fatigue crack growth assuming a linear elastic and isotropic material subjected to constant amplitude loading. A novel feature termed Separating Morphing and Adaptive Remeshing Technology (SMART) was used in conjunction with the Unstructured Mesh Method (UMM) to accomplish this goal. For the modified compact tension specimen with a varied pre-crack location, the crack propagation path, stress intensity factors, and fatigue life cycles were predicted for various stress ratio values. The influence of stress ratio on fatigue life cycles and equivalent stress intensity factor was investigated for stress ratios ranging from 0 to 0.8. It was found that fatigue life and von Mises stress distribution are substantially influenced by the stress ratio. The von Mises stress decreased as the stress ratio increased, and the number of fatigue life cycles increased rapidly with the increasing stress ratio. Depending on the pre-crack position, the hole is the primary attraction for the propagation of fatigue cracks, and the crack may either curve its direction and grow towards it, or it might bypass the hole and propagate elsewhere. Experimental and numerical crack growth studies reported in the literature have validated the findings of this simulation in terms of crack propagation paths. |
| first_indexed | 2024-03-09T13:22:09Z |
| format | Article |
| id | doaj.art-3663ef84017f4512a1b2e5605f3dea75 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T13:22:09Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-3663ef84017f4512a1b2e5605f3dea752023-11-30T21:28:43ZengMDPI AGMaterials1996-19442022-04-01158293710.3390/ma15082937Fatigue Crack Growth Analysis under Constant Amplitude Loading Using Finite Element MethodAbdulnaser M. Alshoaibi0Mechanical Engineering Department, Faculty of Engineering, Jazan University, P.O. Box 114, Jazan 45142, Saudi ArabiaDamage tolerant design relies on accurately predicting the growth rate and path of fatigue cracks under constant and variable amplitude loading. ANSYS Mechanical R19.2 was used to perform a numerical analysis of fatigue crack growth assuming a linear elastic and isotropic material subjected to constant amplitude loading. A novel feature termed Separating Morphing and Adaptive Remeshing Technology (SMART) was used in conjunction with the Unstructured Mesh Method (UMM) to accomplish this goal. For the modified compact tension specimen with a varied pre-crack location, the crack propagation path, stress intensity factors, and fatigue life cycles were predicted for various stress ratio values. The influence of stress ratio on fatigue life cycles and equivalent stress intensity factor was investigated for stress ratios ranging from 0 to 0.8. It was found that fatigue life and von Mises stress distribution are substantially influenced by the stress ratio. The von Mises stress decreased as the stress ratio increased, and the number of fatigue life cycles increased rapidly with the increasing stress ratio. Depending on the pre-crack position, the hole is the primary attraction for the propagation of fatigue cracks, and the crack may either curve its direction and grow towards it, or it might bypass the hole and propagate elsewhere. Experimental and numerical crack growth studies reported in the literature have validated the findings of this simulation in terms of crack propagation paths.https://www.mdpi.com/1996-1944/15/8/2937fatigue analysisequivalent stress intensity factorlinear elastic fracture mechanicsANSYSconstant amplitude loading |
| spellingShingle | Abdulnaser M. Alshoaibi Fatigue Crack Growth Analysis under Constant Amplitude Loading Using Finite Element Method Materials fatigue analysis equivalent stress intensity factor linear elastic fracture mechanics ANSYS constant amplitude loading |
| title | Fatigue Crack Growth Analysis under Constant Amplitude Loading Using Finite Element Method |
| title_full | Fatigue Crack Growth Analysis under Constant Amplitude Loading Using Finite Element Method |
| title_fullStr | Fatigue Crack Growth Analysis under Constant Amplitude Loading Using Finite Element Method |
| title_full_unstemmed | Fatigue Crack Growth Analysis under Constant Amplitude Loading Using Finite Element Method |
| title_short | Fatigue Crack Growth Analysis under Constant Amplitude Loading Using Finite Element Method |
| title_sort | fatigue crack growth analysis under constant amplitude loading using finite element method |
| topic | fatigue analysis equivalent stress intensity factor linear elastic fracture mechanics ANSYS constant amplitude loading |
| url | https://www.mdpi.com/1996-1944/15/8/2937 |
| work_keys_str_mv | AT abdulnasermalshoaibi fatiguecrackgrowthanalysisunderconstantamplitudeloadingusingfiniteelementmethod |