Multi-axial fatigue numerical crack propagation in cruciform specimens
Two cracks, initiated from the opposite tips of a central notch inclined by 45°, were considered in cruciform specimens made of Ti6246. A static load was applied to a cruciform arm while a cyclic load was applied along the other arm. Fatigue propagation of cracked specimens was performed by means...
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| Format: | Article |
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Gruppo Italiano Frattura
2019-03-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2312 |
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| author | Venanzio Giannella Michele Perrella |
| author_facet | Venanzio Giannella Michele Perrella |
| author_sort | Venanzio Giannella |
| collection | DOAJ |
| description | Two cracks, initiated from the opposite tips of a central notch inclined by 45°, were considered in cruciform specimens made of Ti6246. A static load was applied to a cruciform arm while a cyclic load was applied along the other arm.
Fatigue propagation of cracked specimens was performed by means of Dual Boundary Element Method (DBEM) and Finite Element Method (FEM) codes. For crack path assessment, the Minimum Strain Energy Density (MSED) and the Maximum Tensile Stress (MTS) criteria were adopted in DBEM and FEM approaches, respectively. Moreover, the J and M integrals’ formulations were used to evaluate the SIFs along the crack fronts for DBEM and FEM codes, respectively. Crack-growth rates were predicted by using a Walker law, calibrated on mode I fracture experimental data.
A good agreement between numerical and experimental crack paths was obtained. |
| format | Article |
| id | doaj-art-5c5500d9f9dc4445bdd1cfcc0ccca8a9 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2019-03-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-5c5500d9f9dc4445bdd1cfcc0ccca8a92025-01-02T23:01:27ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932019-03-011348Multi-axial fatigue numerical crack propagation in cruciform specimensVenanzio Giannella0Michele Perrella1University of SalernoUniversity of SalernoTwo cracks, initiated from the opposite tips of a central notch inclined by 45°, were considered in cruciform specimens made of Ti6246. A static load was applied to a cruciform arm while a cyclic load was applied along the other arm. Fatigue propagation of cracked specimens was performed by means of Dual Boundary Element Method (DBEM) and Finite Element Method (FEM) codes. For crack path assessment, the Minimum Strain Energy Density (MSED) and the Maximum Tensile Stress (MTS) criteria were adopted in DBEM and FEM approaches, respectively. Moreover, the J and M integrals’ formulations were used to evaluate the SIFs along the crack fronts for DBEM and FEM codes, respectively. Crack-growth rates were predicted by using a Walker law, calibrated on mode I fracture experimental data. A good agreement between numerical and experimental crack paths was obtained.https://www.fracturae.com/index.php/fis/article/view/2312Cruciform specimenMultiple cracksDBEMcrack pathHCF |
| spellingShingle | Venanzio Giannella Michele Perrella Multi-axial fatigue numerical crack propagation in cruciform specimens Fracture and Structural Integrity Cruciform specimen Multiple cracks DBEM crack path HCF |
| title | Multi-axial fatigue numerical crack propagation in cruciform specimens |
| title_full | Multi-axial fatigue numerical crack propagation in cruciform specimens |
| title_fullStr | Multi-axial fatigue numerical crack propagation in cruciform specimens |
| title_full_unstemmed | Multi-axial fatigue numerical crack propagation in cruciform specimens |
| title_short | Multi-axial fatigue numerical crack propagation in cruciform specimens |
| title_sort | multi axial fatigue numerical crack propagation in cruciform specimens |
| topic | Cruciform specimen Multiple cracks DBEM crack path HCF |
| url | https://www.fracturae.com/index.php/fis/article/view/2312 |
| work_keys_str_mv | AT venanziogiannella multiaxialfatiguenumericalcrackpropagationincruciformspecimens AT micheleperrella multiaxialfatiguenumericalcrackpropagationincruciformspecimens |