The effect of low-cycle fatigue on evolution of fracture mechanics parameters in residual stress field caused by cold hole expansion
Localized displacement measurements based on electronic speckle-pattern interferometry are used to obtain crack mouth opening displacement (CMOD), stress intensity factor (SIF) and T-stress values during crack growth around cold-expanded holes. The specimens with a central open hole are made from 20...
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Gruppo Italiano Frattura
2018-12-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2189 |
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| author | Yury Matvienko Vladimir Pisarev Svyatoslav Eleonsky |
| author_facet | Yury Matvienko Vladimir Pisarev Svyatoslav Eleonsky |
| author_sort | Yury Matvienko |
| collection | DOAJ |
| description | Localized displacement measurements based on electronic speckle-pattern interferometry are used to obtain crack mouth opening displacement (CMOD), stress intensity factor (SIF) and T-stress values during crack growth around cold-expanded holes. The specimens with a central open hole are made from 2024 aluminium alloy. The expansion level is 5% of nominal interference. The results are obtained for the same stress range = 350 MPa, but different stress ratio R = –0.4 and R = –1.0. A sequence of narrow notches, inserted under the constant external load, serves for crack modelling at different stages of cyclic loading. Initial experimental data represent in-plane displacement component values measured in the vicinity of the crack tip. The transition from in-plane displacement components to SIF and T-stress values follows from the relationships of modified version of the crack compliance method. The crack length curves of CMOD, SIF and T-stress profiles are obtained for different stages of cyclic loading. These data provide the construction of dependencies of fracture mechanics parameters for cracks of fixed lengths from the loading cycle number. |
| format | Article |
| id | doaj-art-58a78a4689784d36b15092c1301319f0 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2018-12-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-58a78a4689784d36b15092c1301319f02025-01-03T00:40:22ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932018-12-011347The effect of low-cycle fatigue on evolution of fracture mechanics parameters in residual stress field caused by cold hole expansionYury Matvienko0Vladimir PisarevSvyatoslav EleonskyMechanical Engineering Research Institute of the Russian Academy of SciencesLocalized displacement measurements based on electronic speckle-pattern interferometry are used to obtain crack mouth opening displacement (CMOD), stress intensity factor (SIF) and T-stress values during crack growth around cold-expanded holes. The specimens with a central open hole are made from 2024 aluminium alloy. The expansion level is 5% of nominal interference. The results are obtained for the same stress range = 350 MPa, but different stress ratio R = –0.4 and R = –1.0. A sequence of narrow notches, inserted under the constant external load, serves for crack modelling at different stages of cyclic loading. Initial experimental data represent in-plane displacement component values measured in the vicinity of the crack tip. The transition from in-plane displacement components to SIF and T-stress values follows from the relationships of modified version of the crack compliance method. The crack length curves of CMOD, SIF and T-stress profiles are obtained for different stages of cyclic loading. These data provide the construction of dependencies of fracture mechanics parameters for cracks of fixed lengths from the loading cycle number.https://www.fracturae.com/index.php/fis/article/view/2189Cold expansionCrack growthCrack mouth opening displacementStress intensity factorT-stress |
| spellingShingle | Yury Matvienko Vladimir Pisarev Svyatoslav Eleonsky The effect of low-cycle fatigue on evolution of fracture mechanics parameters in residual stress field caused by cold hole expansion Fracture and Structural Integrity Cold expansion Crack growth Crack mouth opening displacement Stress intensity factor T-stress |
| title | The effect of low-cycle fatigue on evolution of fracture mechanics parameters in residual stress field caused by cold hole expansion |
| title_full | The effect of low-cycle fatigue on evolution of fracture mechanics parameters in residual stress field caused by cold hole expansion |
| title_fullStr | The effect of low-cycle fatigue on evolution of fracture mechanics parameters in residual stress field caused by cold hole expansion |
| title_full_unstemmed | The effect of low-cycle fatigue on evolution of fracture mechanics parameters in residual stress field caused by cold hole expansion |
| title_short | The effect of low-cycle fatigue on evolution of fracture mechanics parameters in residual stress field caused by cold hole expansion |
| title_sort | effect of low cycle fatigue on evolution of fracture mechanics parameters in residual stress field caused by cold hole expansion |
| topic | Cold expansion Crack growth Crack mouth opening displacement Stress intensity factor T-stress |
| url | https://www.fracturae.com/index.php/fis/article/view/2189 |
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