Study of the primary factor in the fatigue strength of steel-aluminium brazing joint by partial machining of joint parts
Weld-joint has been atracting attention to assemble structures of dissimilar metals, particularly in automobile industry. However, the application of weld-joint to steel and aluminum plates is still limited due to uncertainty of the fatigue strength. Fatigue strength of weld-joint is rather complica...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2018-08-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/84/865/84_18-00137/_pdf/-char/en |
| _version_ | 1797989024851296256 |
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| author | Kosuke TAKAHASHI Hiroshi FUKAZAWA Kouta WAKUI Farid TRIAWAN Kazuaki INABA Kikuo KISHIMOTO Toru HASHIMURA |
| author_facet | Kosuke TAKAHASHI Hiroshi FUKAZAWA Kouta WAKUI Farid TRIAWAN Kazuaki INABA Kikuo KISHIMOTO Toru HASHIMURA |
| author_sort | Kosuke TAKAHASHI |
| collection | DOAJ |
| description | Weld-joint has been atracting attention to assemble structures of dissimilar metals, particularly in automobile industry. However, the application of weld-joint to steel and aluminum plates is still limited due to uncertainty of the fatigue strength. Fatigue strength of weld-joint is rather complicated to evaluate because both effects of stress concentration at the edge and formation of intermetallic compounds along the interface should be considered carefully. This study focused on finding the key factor that determines the fatigue strength of steel-aluminum brazing joint by considering the variation of strength along interface. The welded part of single lap joint was partially removed by a wire-cut electric discharge machine to investigate the influence of length and location of interface on fatigue strength. When the applied load was relatively low it was found that the numbers of cycles to failure were found to be similar, even though the lengths of interface were different due to partial removal. Furthermore, observation on the fracture surface indicated that early stage of crack propagation showed similar topography regardless of the partial removal of weld part. These results clarified that the number of cycles to failure was mainly consumed at the early stage. Finite element analysis was then conducted to investigate the stress component affecting the fatigue strength. As a result, principal stresses were maximum at the fracture initiation site in all the specimens. Therefore, we concluded that fatigue life of weld-joint is dominant in the early stage of crack propagation, which is characterized by the principal stress. |
| first_indexed | 2024-04-11T08:12:29Z |
| format | Article |
| id | doaj.art-64eb7e40ba3d4e97bed0de2896ea6397 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T08:12:29Z |
| publishDate | 2018-08-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-64eb7e40ba3d4e97bed0de2896ea63972022-12-22T04:35:16ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612018-08-018486518-0013718-0013710.1299/transjsme.18-00137transjsmeStudy of the primary factor in the fatigue strength of steel-aluminium brazing joint by partial machining of joint partsKosuke TAKAHASHI0Hiroshi FUKAZAWA1Kouta WAKUI2Farid TRIAWAN3Kazuaki INABA4Kikuo KISHIMOTO5Toru HASHIMURA6Division of Mechanical and Space Engineering, Hokkaido UniversityTokyo Institute of TechnologyTokyo Institute of TechnologyTokyo Institute of TechnologyTokyo Institute of TechnologyTokyo Institute of TechnologyKobe Steel, Ltd.Weld-joint has been atracting attention to assemble structures of dissimilar metals, particularly in automobile industry. However, the application of weld-joint to steel and aluminum plates is still limited due to uncertainty of the fatigue strength. Fatigue strength of weld-joint is rather complicated to evaluate because both effects of stress concentration at the edge and formation of intermetallic compounds along the interface should be considered carefully. This study focused on finding the key factor that determines the fatigue strength of steel-aluminum brazing joint by considering the variation of strength along interface. The welded part of single lap joint was partially removed by a wire-cut electric discharge machine to investigate the influence of length and location of interface on fatigue strength. When the applied load was relatively low it was found that the numbers of cycles to failure were found to be similar, even though the lengths of interface were different due to partial removal. Furthermore, observation on the fracture surface indicated that early stage of crack propagation showed similar topography regardless of the partial removal of weld part. These results clarified that the number of cycles to failure was mainly consumed at the early stage. Finite element analysis was then conducted to investigate the stress component affecting the fatigue strength. As a result, principal stresses were maximum at the fracture initiation site in all the specimens. Therefore, we concluded that fatigue life of weld-joint is dominant in the early stage of crack propagation, which is characterized by the principal stress.https://www.jstage.jst.go.jp/article/transjsme/84/865/84_18-00137/_pdf/-char/ensteel-alminum dissimilar jointlaser brazingsingle lap jointfatigueinterfacestress analysis |
| spellingShingle | Kosuke TAKAHASHI Hiroshi FUKAZAWA Kouta WAKUI Farid TRIAWAN Kazuaki INABA Kikuo KISHIMOTO Toru HASHIMURA Study of the primary factor in the fatigue strength of steel-aluminium brazing joint by partial machining of joint parts Nihon Kikai Gakkai ronbunshu steel-alminum dissimilar joint laser brazing single lap joint fatigue interface stress analysis |
| title | Study of the primary factor in the fatigue strength of steel-aluminium brazing joint by partial machining of joint parts |
| title_full | Study of the primary factor in the fatigue strength of steel-aluminium brazing joint by partial machining of joint parts |
| title_fullStr | Study of the primary factor in the fatigue strength of steel-aluminium brazing joint by partial machining of joint parts |
| title_full_unstemmed | Study of the primary factor in the fatigue strength of steel-aluminium brazing joint by partial machining of joint parts |
| title_short | Study of the primary factor in the fatigue strength of steel-aluminium brazing joint by partial machining of joint parts |
| title_sort | study of the primary factor in the fatigue strength of steel aluminium brazing joint by partial machining of joint parts |
| topic | steel-alminum dissimilar joint laser brazing single lap joint fatigue interface stress analysis |
| url | https://www.jstage.jst.go.jp/article/transjsme/84/865/84_18-00137/_pdf/-char/en |
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