Multiaxial fatigue of cast aluminium EN AC-42000 T6 (G-AlSi7Mg0.3 T6) for automotive safety components under constant and variable amplitude loading
Regarding the fatigue behaviour of EN AC-42000 T6 (A 356 T6), which is the most frequently used cast aluminium alloy for automotive safety components, especially under non-proportional constant and variable normal and shear stress amplitudes with changing principal stress directions, a poor level...
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Gruppo Italiano Frattura
2016-07-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero37/numero_37_art_26.pdf |
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| author | C.M. Sonsino R. Franz |
| author_facet | C.M. Sonsino R. Franz |
| author_sort | C.M. Sonsino |
| collection | DOAJ |
| description | Regarding the fatigue behaviour of EN AC-42000 T6 (A 356 T6), which is the most frequently
used cast aluminium alloy for automotive safety components, especially under non-proportional constant and
variable normal and shear stress amplitudes with changing principal stress directions, a poor level of knowledge
was available. The reported investigations show that, under non-proportional normal and shear stresses, fatigue
life is increased in contrast to ductile steels where life is reduced due to changing principal stress directions. This
behaviour caused by the low ductility of this alloy (e < 10%) compared to quenched and tempered steels
suggests the application of the Normal (Principal) Stress Hypothesis (NSH). For all of the investigated stress
states under multiaxial constant and variable (Gaussian spectrum) amplitudes without and with mean stresses,
the NSH was able to depict the life increase by the non-proportionality and delivered, for most cases,
conservative but non-exaggerated results. |
| format | Article |
| id | doaj-art-b67386abdd304cf59500e957fd7a1c16 |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2016-07-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-b67386abdd304cf59500e957fd7a1c162025-02-03T00:45:31ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932016-07-01103720020610.3221/IGF-ESIS.37.26Multiaxial fatigue of cast aluminium EN AC-42000 T6 (G-AlSi7Mg0.3 T6) for automotive safety components under constant and variable amplitude loadingC.M. Sonsino0R. Franz1Fraunhofer Institute for Structural Durability and System Reliability LBF,GermanyFraunhofer Institute for Structural Durability and System Reliability LBF,GermanyRegarding the fatigue behaviour of EN AC-42000 T6 (A 356 T6), which is the most frequently used cast aluminium alloy for automotive safety components, especially under non-proportional constant and variable normal and shear stress amplitudes with changing principal stress directions, a poor level of knowledge was available. The reported investigations show that, under non-proportional normal and shear stresses, fatigue life is increased in contrast to ductile steels where life is reduced due to changing principal stress directions. This behaviour caused by the low ductility of this alloy (e < 10%) compared to quenched and tempered steels suggests the application of the Normal (Principal) Stress Hypothesis (NSH). For all of the investigated stress states under multiaxial constant and variable (Gaussian spectrum) amplitudes without and with mean stresses, the NSH was able to depict the life increase by the non-proportionality and delivered, for most cases, conservative but non-exaggerated results.http://www.gruppofrattura.it/pdf/rivista/numero37/numero_37_art_26.pdfCast aluminiumMultiaxial fatigueSpectrum loading |
| spellingShingle | C.M. Sonsino R. Franz Multiaxial fatigue of cast aluminium EN AC-42000 T6 (G-AlSi7Mg0.3 T6) for automotive safety components under constant and variable amplitude loading Fracture and Structural Integrity Cast aluminium Multiaxial fatigue Spectrum loading |
| title | Multiaxial fatigue of cast aluminium EN AC-42000 T6 (G-AlSi7Mg0.3 T6) for automotive safety components under constant and variable amplitude loading |
| title_full | Multiaxial fatigue of cast aluminium EN AC-42000 T6 (G-AlSi7Mg0.3 T6) for automotive safety components under constant and variable amplitude loading |
| title_fullStr | Multiaxial fatigue of cast aluminium EN AC-42000 T6 (G-AlSi7Mg0.3 T6) for automotive safety components under constant and variable amplitude loading |
| title_full_unstemmed | Multiaxial fatigue of cast aluminium EN AC-42000 T6 (G-AlSi7Mg0.3 T6) for automotive safety components under constant and variable amplitude loading |
| title_short | Multiaxial fatigue of cast aluminium EN AC-42000 T6 (G-AlSi7Mg0.3 T6) for automotive safety components under constant and variable amplitude loading |
| title_sort | multiaxial fatigue of cast aluminium en ac 42000 t6 g alsi7mg0 3 t6 for automotive safety components under constant and variable amplitude loading |
| topic | Cast aluminium Multiaxial fatigue Spectrum loading |
| url | http://www.gruppofrattura.it/pdf/rivista/numero37/numero_37_art_26.pdf |
| work_keys_str_mv | AT cmsonsino multiaxialfatigueofcastaluminiumenac42000t6galsi7mg03t6forautomotivesafetycomponentsunderconstantandvariableamplitudeloading AT rfranz multiaxialfatigueofcastaluminiumenac42000t6galsi7mg03t6forautomotivesafetycomponentsunderconstantandvariableamplitudeloading |