Effect of yield stress on fatigue crack growth
Abstract. Fatigue crack growth (FCG) depends on loading, geometry and also material properties. Since FCG is supposedly linked to crack tip plastic deformation, material’s yield stress, Y0, is an important parameter. The main objective here is to develop a parametric study focused on the effect of Y...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2019-07-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2528 |
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| _version_ | 1841562322375540736 |
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| author | Fernando Ventura Antunes Micael Frias Borges Pedro Prates Ricardo Branco Marta Oliveira |
| author_facet | Fernando Ventura Antunes Micael Frias Borges Pedro Prates Ricardo Branco Marta Oliveira |
| author_sort | Fernando Ventura Antunes |
| collection | DOAJ |
| description | Abstract. Fatigue crack growth (FCG) depends on loading, geometry and also material properties. Since FCG is supposedly linked to crack tip plastic deformation, material’s yield stress, Y0, is an important parameter. The main objective here is to develop a parametric study focused on the effect of Y0 on FCG. The study is based on the plastic CTOD, dp, determined numerically using the finite element method. The increase of Y0 was found to decrease dp, and therefore FCG rate. The variation is non-linear, being more important for lower values of Y0. The effect of Y0 was found to be much more relevant for the 7050 aluminium alloy than for the 304L stainless steel, which indicated a major influence of isotropic saturation stress. With the inclusion of crack closure, the reduction of dp is kept, but there is a substantial reduction of dp and therefore of FCG rate. |
| format | Article |
| id | doaj-art-81583803a6f449d2a528cc1a36748f41 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2019-07-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-81583803a6f449d2a528cc1a36748f412025-01-03T01:03:06ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932019-07-011350Effect of yield stress on fatigue crack growthFernando Ventura Antunes0Micael Frias BorgesPedro PratesRicardo BrancoMarta OliveiraDepartment of Mechanical Engineering, University of Coimbra, PortugalAbstract. Fatigue crack growth (FCG) depends on loading, geometry and also material properties. Since FCG is supposedly linked to crack tip plastic deformation, material’s yield stress, Y0, is an important parameter. The main objective here is to develop a parametric study focused on the effect of Y0 on FCG. The study is based on the plastic CTOD, dp, determined numerically using the finite element method. The increase of Y0 was found to decrease dp, and therefore FCG rate. The variation is non-linear, being more important for lower values of Y0. The effect of Y0 was found to be much more relevant for the 7050 aluminium alloy than for the 304L stainless steel, which indicated a major influence of isotropic saturation stress. With the inclusion of crack closure, the reduction of dp is kept, but there is a substantial reduction of dp and therefore of FCG rate.https://www.fracturae.com/index.php/fis/article/view/2528Fatigue Crack Growthplastic CTODyield stresscrack closure |
| spellingShingle | Fernando Ventura Antunes Micael Frias Borges Pedro Prates Ricardo Branco Marta Oliveira Effect of yield stress on fatigue crack growth Fracture and Structural Integrity Fatigue Crack Growth plastic CTOD yield stress crack closure |
| title | Effect of yield stress on fatigue crack growth |
| title_full | Effect of yield stress on fatigue crack growth |
| title_fullStr | Effect of yield stress on fatigue crack growth |
| title_full_unstemmed | Effect of yield stress on fatigue crack growth |
| title_short | Effect of yield stress on fatigue crack growth |
| title_sort | effect of yield stress on fatigue crack growth |
| topic | Fatigue Crack Growth plastic CTOD yield stress crack closure |
| url | https://www.fracturae.com/index.php/fis/article/view/2528 |
| work_keys_str_mv | AT fernandoventuraantunes effectofyieldstressonfatiguecrackgrowth AT micaelfriasborges effectofyieldstressonfatiguecrackgrowth AT pedroprates effectofyieldstressonfatiguecrackgrowth AT ricardobranco effectofyieldstressonfatiguecrackgrowth AT martaoliveira effectofyieldstressonfatiguecrackgrowth |