A model to quantify fatigue crack growth by cyclic damage accumulation calculated by strip-yield procedures
Elber's hypothesis that Keff can be assumed as the driving force for fatigue crack growth (FCG) is the basis for strip-yield models widely used to predict fatigue lives under variable amplitude loads, although it does not explain all load sequence effects observed in practice. To verify if th...
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| Format: | Article |
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Gruppo Italiano Frattura
2017-07-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero41/numero_41_art_18.pdf |
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| author | Samuel Elias Ferreira Jaime Tupiassú Pinho de Castro Marco Antonio Meggiolaro |
| author_facet | Samuel Elias Ferreira Jaime Tupiassú Pinho de Castro Marco Antonio Meggiolaro |
| author_sort | Samuel Elias Ferreira |
| collection | DOAJ |
| description | Elber's hypothesis that Keff can be assumed as the driving force for fatigue crack growth (FCG) is the basis for strip-yield models widely used to predict fatigue lives under variable amplitude loads, although it does not explain all load sequence effects observed in practice. To verify if these models are indeed intrinsically better, the mechanics of a typical strip-yield model is used to predict FCG rates based both on Elber's ideas and on the alternative view that FCG is instead due to damage accumulation induced by the cyclic strain history ahead of the crack tip, which does not need or use Keff ideas. The main purpose here is to predict FCG using the cyclic strains induced by the plastic displacements calculated by strip-yield procedures, assuming there are strain limits associated both the with the FCG threshold and with the material toughness. Despite based on conflicting principles, both models can reproduce quite well FCG data, a somewhat surprising result that deserves to be carefully analyzed. |
| format | Article |
| id | doaj-art-2ade807776034de19902c614ebd6b7e3 |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2017-07-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-2ade807776034de19902c614ebd6b7e32025-01-03T00:40:08ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932017-07-01114112913810.3221/IGF-ESIS.41.18A model to quantify fatigue crack growth by cyclic damage accumulation calculated by strip-yield proceduresSamuel Elias Ferreira0 Jaime Tupiassú Pinho de Castro1Marco Antonio Meggiolaro 2Pontifical Catholic University of Rio de Janeiro, BrazilPontifical Catholic University of Rio de Janeiro, BrazilPontifical Catholic University of Rio de Janeiro, BrazilElber's hypothesis that Keff can be assumed as the driving force for fatigue crack growth (FCG) is the basis for strip-yield models widely used to predict fatigue lives under variable amplitude loads, although it does not explain all load sequence effects observed in practice. To verify if these models are indeed intrinsically better, the mechanics of a typical strip-yield model is used to predict FCG rates based both on Elber's ideas and on the alternative view that FCG is instead due to damage accumulation induced by the cyclic strain history ahead of the crack tip, which does not need or use Keff ideas. The main purpose here is to predict FCG using the cyclic strains induced by the plastic displacements calculated by strip-yield procedures, assuming there are strain limits associated both the with the FCG threshold and with the material toughness. Despite based on conflicting principles, both models can reproduce quite well FCG data, a somewhat surprising result that deserves to be carefully analyzed.http://www.gruppofrattura.it/pdf/rivista/numero41/numero_41_art_18.pdfFatigue crack growth modelsStrip-yield mechanicsCrack closure; Damage accumulation ahead of the crack tip |
| spellingShingle | Samuel Elias Ferreira Jaime Tupiassú Pinho de Castro Marco Antonio Meggiolaro A model to quantify fatigue crack growth by cyclic damage accumulation calculated by strip-yield procedures Fracture and Structural Integrity Fatigue crack growth models Strip-yield mechanics Crack closure ; Damage accumulation ahead of the crack tip |
| title | A model to quantify fatigue crack growth by cyclic damage accumulation calculated by strip-yield procedures |
| title_full | A model to quantify fatigue crack growth by cyclic damage accumulation calculated by strip-yield procedures |
| title_fullStr | A model to quantify fatigue crack growth by cyclic damage accumulation calculated by strip-yield procedures |
| title_full_unstemmed | A model to quantify fatigue crack growth by cyclic damage accumulation calculated by strip-yield procedures |
| title_short | A model to quantify fatigue crack growth by cyclic damage accumulation calculated by strip-yield procedures |
| title_sort | model to quantify fatigue crack growth by cyclic damage accumulation calculated by strip yield procedures |
| topic | Fatigue crack growth models Strip-yield mechanics Crack closure ; Damage accumulation ahead of the crack tip |
| url | http://www.gruppofrattura.it/pdf/rivista/numero41/numero_41_art_18.pdf |
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