S-N curve modeling method of Aluminum alloy welded joints based on the fatigue characteristics domain
The scatter degree of the fatigue samples is reduced when the nodal force based structural method is used for steel welded joints, while it is still high for aluminum alloy welded joints. Statistical method and rough set theory is used to fatigue analysis so that fatigue characteristic domains are d...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2017-04-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero40/numero_40_art_12.pdf |
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| _version_ | 1850088664290295808 |
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| author | Li Zou Xinhua Yang Jianrong Tan Yibo Sun |
| author_facet | Li Zou Xinhua Yang Jianrong Tan Yibo Sun |
| author_sort | Li Zou |
| collection | DOAJ |
| description | The scatter degree of the fatigue samples is reduced when the nodal force based structural method is used for steel welded joints, while it is still high for aluminum alloy welded joints. Statistical method and rough set theory is used to fatigue analysis so that fatigue characteristic domains are determined and S-N curves are fitted. Experiment results show that fatigue life of the aluminum alloy welded joints is under the influence of some key factors and the fatigue data with the same characteristics distribute in a relatively independent area. Accordingly, a novel S-N curve modeling method of aluminum alloy welded joints based on the fatigue characteristics domain is proposed. In the proposed method, the nodal force based structural stress method is used for stress calculation and neighborhood rough set theory is used for character extraction to obtain the key factors. Then fatigue characteristics domains are divided and S-N curves are fitted on each fatigue characteristics domain instead of on the whole domain so that a set of S-N curves are obtained. Statistical results show that selection of the S-N curve for the aluminum alloy welded joints according to different fatigue characteristic domain is more accurate. |
| format | Article |
| id | doaj-art-9554cb0dd0d94af2b445f9d0d8f7dcff |
| institution | DOAJ |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2017-04-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-9554cb0dd0d94af2b445f9d0d8f7dcff2025-08-20T02:42:57ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932017-04-01114013714810.3221/IGF-ESIS.40.12S-N curve modeling method of Aluminum alloy welded joints based on the fatigue characteristics domainLi Zou0Xinhua Yang1Jianrong Tan 2Yibo Sun 3Software Institute, Dalian Jiaotong University, Lvshun 116052, China College of Material Science and Engineering, Dalian Jiaotong University, Dalian, China Department of mechanical engineering and automation, Zhejiang University, Zhejiang, ChinaCollege of Material Science and Engineering, Dalian Jiaotong University, Dalian, China The scatter degree of the fatigue samples is reduced when the nodal force based structural method is used for steel welded joints, while it is still high for aluminum alloy welded joints. Statistical method and rough set theory is used to fatigue analysis so that fatigue characteristic domains are determined and S-N curves are fitted. Experiment results show that fatigue life of the aluminum alloy welded joints is under the influence of some key factors and the fatigue data with the same characteristics distribute in a relatively independent area. Accordingly, a novel S-N curve modeling method of aluminum alloy welded joints based on the fatigue characteristics domain is proposed. In the proposed method, the nodal force based structural stress method is used for stress calculation and neighborhood rough set theory is used for character extraction to obtain the key factors. Then fatigue characteristics domains are divided and S-N curves are fitted on each fatigue characteristics domain instead of on the whole domain so that a set of S-N curves are obtained. Statistical results show that selection of the S-N curve for the aluminum alloy welded joints according to different fatigue characteristic domain is more accurate.http://www.gruppofrattura.it/pdf/rivista/numero40/numero_40_art_12.pdfWeldingFatigueStructural stressRough set theoryS-N curve |
| spellingShingle | Li Zou Xinhua Yang Jianrong Tan Yibo Sun S-N curve modeling method of Aluminum alloy welded joints based on the fatigue characteristics domain Fracture and Structural Integrity Welding Fatigue Structural stress Rough set theory S-N curve |
| title | S-N curve modeling method of Aluminum alloy welded joints based on the fatigue characteristics domain |
| title_full | S-N curve modeling method of Aluminum alloy welded joints based on the fatigue characteristics domain |
| title_fullStr | S-N curve modeling method of Aluminum alloy welded joints based on the fatigue characteristics domain |
| title_full_unstemmed | S-N curve modeling method of Aluminum alloy welded joints based on the fatigue characteristics domain |
| title_short | S-N curve modeling method of Aluminum alloy welded joints based on the fatigue characteristics domain |
| title_sort | s n curve modeling method of aluminum alloy welded joints based on the fatigue characteristics domain |
| topic | Welding Fatigue Structural stress Rough set theory S-N curve |
| url | http://www.gruppofrattura.it/pdf/rivista/numero40/numero_40_art_12.pdf |
| work_keys_str_mv | AT lizou sncurvemodelingmethodofaluminumalloyweldedjointsbasedonthefatiguecharacteristicsdomain AT xinhuayang sncurvemodelingmethodofaluminumalloyweldedjointsbasedonthefatiguecharacteristicsdomain AT jianrongtan sncurvemodelingmethodofaluminumalloyweldedjointsbasedonthefatiguecharacteristicsdomain AT yibosun sncurvemodelingmethodofaluminumalloyweldedjointsbasedonthefatiguecharacteristicsdomain |