Influence of Notch Sensitivity and Crack Initiation Site on Low Cycle Fatigue Life of Notched Components under Multiaxial Non-proportional Loading
A series of strain-controlled multiaxial low cycle fatigue (LCF) tests under proportional and non-proportional loading conditions have been conducted on notched specimens. Cylindrical bars of Al 6061 aluminum alloy and AISI 316L stainless steel with four values of stress concentration factors referr...
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| Format: | Article |
| Language: | English |
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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/2263 |
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| author | Stefano Bressan Fumio Ogawa Takamoto Itoh Filippo Berto |
| author_facet | Stefano Bressan Fumio Ogawa Takamoto Itoh Filippo Berto |
| author_sort | Stefano Bressan |
| collection | DOAJ |
| description | A series of strain-controlled multiaxial low cycle fatigue (LCF) tests under proportional and non-proportional loading conditions have been conducted on notched specimens. Cylindrical bars of Al 6061 aluminum alloy and AISI 316L stainless steel with four values of stress concentration factors referred to the net section Kt,n were employed. The experimental results evidenced a reduction of fatigue life due to non-proportional loading. Furthermore, the crack initiation site has been detected to be moved from the notch tip in the case of steel for high values of notch radius under non-proportional loading. Stress concentration factor evaluated in the elastic field Kt,n has been included in the Itoh-Sakane parameter to evaluate the fatigue life, returning a general underestimation of fatigue life especially for high values of Kt,n. Material notch sensitivity and crack initiation position have been taken into account to further modify the model, improving the original results and showing a better assessment. |
| format | Article |
| id | doaj-art-bb2fe12ef07e4053a9709a40d1229448 |
| 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-bb2fe12ef07e4053a9709a40d12294482025-01-03T00:39:47ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932018-12-011347Influence of Notch Sensitivity and Crack Initiation Site on Low Cycle Fatigue Life of Notched Components under Multiaxial Non-proportional LoadingStefano Bressan0Fumio OgawaTakamoto ItohFilippo BertoRitsumeikan UniversityA series of strain-controlled multiaxial low cycle fatigue (LCF) tests under proportional and non-proportional loading conditions have been conducted on notched specimens. Cylindrical bars of Al 6061 aluminum alloy and AISI 316L stainless steel with four values of stress concentration factors referred to the net section Kt,n were employed. The experimental results evidenced a reduction of fatigue life due to non-proportional loading. Furthermore, the crack initiation site has been detected to be moved from the notch tip in the case of steel for high values of notch radius under non-proportional loading. Stress concentration factor evaluated in the elastic field Kt,n has been included in the Itoh-Sakane parameter to evaluate the fatigue life, returning a general underestimation of fatigue life especially for high values of Kt,n. Material notch sensitivity and crack initiation position have been taken into account to further modify the model, improving the original results and showing a better assessment.https://www.fracturae.com/index.php/fis/article/view/2263Non-proportional loadingNotchMultiaxial loadingLow cycle fatigueCrack initiation |
| spellingShingle | Stefano Bressan Fumio Ogawa Takamoto Itoh Filippo Berto Influence of Notch Sensitivity and Crack Initiation Site on Low Cycle Fatigue Life of Notched Components under Multiaxial Non-proportional Loading Fracture and Structural Integrity Non-proportional loading Notch Multiaxial loading Low cycle fatigue Crack initiation |
| title | Influence of Notch Sensitivity and Crack Initiation Site on Low Cycle Fatigue Life of Notched Components under Multiaxial Non-proportional Loading |
| title_full | Influence of Notch Sensitivity and Crack Initiation Site on Low Cycle Fatigue Life of Notched Components under Multiaxial Non-proportional Loading |
| title_fullStr | Influence of Notch Sensitivity and Crack Initiation Site on Low Cycle Fatigue Life of Notched Components under Multiaxial Non-proportional Loading |
| title_full_unstemmed | Influence of Notch Sensitivity and Crack Initiation Site on Low Cycle Fatigue Life of Notched Components under Multiaxial Non-proportional Loading |
| title_short | Influence of Notch Sensitivity and Crack Initiation Site on Low Cycle Fatigue Life of Notched Components under Multiaxial Non-proportional Loading |
| title_sort | influence of notch sensitivity and crack initiation site on low cycle fatigue life of notched components under multiaxial non proportional loading |
| topic | Non-proportional loading Notch Multiaxial loading Low cycle fatigue Crack initiation |
| url | https://www.fracturae.com/index.php/fis/article/view/2263 |
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