Combined simulation of fatigue crack nucleation and propagation based on a damage indicator
Fatigue considerations often distinguish between fatigue crack nucleation and fatigue crack propagation. The current work presents a modeling approach utilizing one Fatigue Damage Indicator to treat both in a unified way. The approach is implemented within the framework of the Finite Element Method....
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2016-10-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/1783 |
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| author | M. Springer M. Nelhiebel H. E. Pettermann |
| author_facet | M. Springer M. Nelhiebel H. E. Pettermann |
| author_sort | M. Springer |
| collection | DOAJ |
| description | Fatigue considerations often distinguish between fatigue crack nucleation and fatigue crack propagation. The current work presents a modeling approach utilizing one Fatigue Damage Indicator to treat both in a unified way. The approach is implemented within the framework of the Finite Element Method. Multiaxial critical plane models with an extended damage accumulation are employed as Fatigue Indicators. Locations of fatigue crack emergence are predicted by these indicators and material degradation is utilized to model local material failure. The cyclic loading is continued on the now degraded structure and the next location prone to material failure is identified and degradation modeled. This way, fatigue crack propagation is represented by an evolving spatial zone of material failure. This propagating damage zone leads to a changing structural response of the pristine structure. By recourse to the Fatigue Damage Indicator a correlation between the number of applied load cycles and the changing structural behavior is established. Finally, the proposed approach is exemplified by cyclic bending experiments in the Low Cycle Fatigue regime. |
| format | Article |
| id | doaj-art-3031b2900e574fb3b091cfedab05cd4b |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2016-10-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-3031b2900e574fb3b091cfedab05cd4b2025-01-03T00:39:59ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932016-10-011038Combined simulation of fatigue crack nucleation and propagation based on a damage indicatorM. Springer0M. NelhiebelH. E. Pettermannspringer@ilsb.tuwien.ac.atFatigue considerations often distinguish between fatigue crack nucleation and fatigue crack propagation. The current work presents a modeling approach utilizing one Fatigue Damage Indicator to treat both in a unified way. The approach is implemented within the framework of the Finite Element Method. Multiaxial critical plane models with an extended damage accumulation are employed as Fatigue Indicators. Locations of fatigue crack emergence are predicted by these indicators and material degradation is utilized to model local material failure. The cyclic loading is continued on the now degraded structure and the next location prone to material failure is identified and degradation modeled. This way, fatigue crack propagation is represented by an evolving spatial zone of material failure. This propagating damage zone leads to a changing structural response of the pristine structure. By recourse to the Fatigue Damage Indicator a correlation between the number of applied load cycles and the changing structural behavior is established. Finally, the proposed approach is exemplified by cyclic bending experiments in the Low Cycle Fatigue regime.https://www.fracturae.com/index.php/fis/article/view/1783Fatigue Crack NucleationFatigue Crack PropagationDamage IndicatorFinite Element Method |
| spellingShingle | M. Springer M. Nelhiebel H. E. Pettermann Combined simulation of fatigue crack nucleation and propagation based on a damage indicator Fracture and Structural Integrity Fatigue Crack Nucleation Fatigue Crack Propagation Damage Indicator Finite Element Method |
| title | Combined simulation of fatigue crack nucleation and propagation based on a damage indicator |
| title_full | Combined simulation of fatigue crack nucleation and propagation based on a damage indicator |
| title_fullStr | Combined simulation of fatigue crack nucleation and propagation based on a damage indicator |
| title_full_unstemmed | Combined simulation of fatigue crack nucleation and propagation based on a damage indicator |
| title_short | Combined simulation of fatigue crack nucleation and propagation based on a damage indicator |
| title_sort | combined simulation of fatigue crack nucleation and propagation based on a damage indicator |
| topic | Fatigue Crack Nucleation Fatigue Crack Propagation Damage Indicator Finite Element Method |
| url | https://www.fracturae.com/index.php/fis/article/view/1783 |
| work_keys_str_mv | AT mspringer combinedsimulationoffatiguecracknucleationandpropagationbasedonadamageindicator AT mnelhiebel combinedsimulationoffatiguecracknucleationandpropagationbasedonadamageindicator AT hepettermann combinedsimulationoffatiguecracknucleationandpropagationbasedonadamageindicator |