Fatigue life estimation in welded joints under multiaxial loadings
Welded joints are frequently locations for cracks initiation and propagation that may cause fatigue failure of engineering structures. Biaxial or triaxial stress-strain states are present in the vicinity of welded joints, due to local geometrical constraints, welding processes and/or multiaxial ext...
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Gruppo Italiano Frattura
2009-07-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero9/numero_9_art_5.pdf |
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| _version_ | 1841564258144354304 |
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| author | Sabrina Vantadori Andrea Spagnoli Andrea Carpinteri |
| author_facet | Sabrina Vantadori Andrea Spagnoli Andrea Carpinteri |
| author_sort | Sabrina Vantadori |
| collection | DOAJ |
| description | Welded joints are frequently locations for cracks initiation and propagation that may cause fatigue failure of engineering structures. Biaxial or triaxial stress-strain states are present in the vicinity of welded joints, due to local geometrical constraints, welding processes and/or multiaxial external loadings. Fatigue life evaluation of welded joints under multiaxial proportional (in-phase) cyclic loading can be performed by using conventional hypotheses (e.g. see the von Mises criterion or the Tresca criterion) on the basis of local approaches. On the contrary, the fatigue life predictions of welded joints under non-proportional (out-ofphase) cyclic loading are generally unsafe if these conventional hypotheses are used. A criterion initially proposed by the authors for smooth and notched structural components has been extended to the fatigue assessment of welded joints. In more detail, fatigue life of welded joints under multiaxial stress states can be evaluated by considering a nonlinear combination of the shear stress amplitude (acting on the critical plane) and the amplitude and the mean value of the normal stress (acting on the critical plane). In the present paper, fatigue lifetimes predicted through the proposed criterion are compared with experimental fatigue life data available in the literature, related to fatigue biaxial tests. |
| format | Article |
| id | doaj-art-927b8c93e17943fb90723faacd3ccbf7 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2009-07-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-927b8c93e17943fb90723faacd3ccbf72025-01-02T23:01:12ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932009-07-01394654Fatigue life estimation in welded joints under multiaxial loadingsSabrina VantadoriAndrea SpagnoliAndrea CarpinteriWelded joints are frequently locations for cracks initiation and propagation that may cause fatigue failure of engineering structures. Biaxial or triaxial stress-strain states are present in the vicinity of welded joints, due to local geometrical constraints, welding processes and/or multiaxial external loadings. Fatigue life evaluation of welded joints under multiaxial proportional (in-phase) cyclic loading can be performed by using conventional hypotheses (e.g. see the von Mises criterion or the Tresca criterion) on the basis of local approaches. On the contrary, the fatigue life predictions of welded joints under non-proportional (out-ofphase) cyclic loading are generally unsafe if these conventional hypotheses are used. A criterion initially proposed by the authors for smooth and notched structural components has been extended to the fatigue assessment of welded joints. In more detail, fatigue life of welded joints under multiaxial stress states can be evaluated by considering a nonlinear combination of the shear stress amplitude (acting on the critical plane) and the amplitude and the mean value of the normal stress (acting on the critical plane). In the present paper, fatigue lifetimes predicted through the proposed criterion are compared with experimental fatigue life data available in the literature, related to fatigue biaxial tests.http://www.gruppofrattura.it/pdf/rivista/numero9/numero_9_art_5.pdfWelded jointsnominal stresseslifetime predictioncritical plane approach |
| spellingShingle | Sabrina Vantadori Andrea Spagnoli Andrea Carpinteri Fatigue life estimation in welded joints under multiaxial loadings Fracture and Structural Integrity Welded joints nominal stresses lifetime prediction critical plane approach |
| title | Fatigue life estimation in welded joints under multiaxial loadings |
| title_full | Fatigue life estimation in welded joints under multiaxial loadings |
| title_fullStr | Fatigue life estimation in welded joints under multiaxial loadings |
| title_full_unstemmed | Fatigue life estimation in welded joints under multiaxial loadings |
| title_short | Fatigue life estimation in welded joints under multiaxial loadings |
| title_sort | fatigue life estimation in welded joints under multiaxial loadings |
| topic | Welded joints nominal stresses lifetime prediction critical plane approach |
| url | http://www.gruppofrattura.it/pdf/rivista/numero9/numero_9_art_5.pdf |
| work_keys_str_mv | AT sabrinavantadori fatiguelifeestimationinweldedjointsundermultiaxialloadings AT andreaspagnoli fatiguelifeestimationinweldedjointsundermultiaxialloadings AT andreacarpinteri fatiguelifeestimationinweldedjointsundermultiaxialloadings |