Thickened holes edge including compressed rollover for improving tensile fatigue strength of thick sheet
Body-in-white parts are generally punched to make many holes for joining, attachment and reduction in weight. The static strength of high strength steel sheets is almost proportional with the strength of the sheet, whereas the fatigue strength becomes gradually smaller. In addition, onset and progre...
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| Format: | Conference or Workshop Item |
| Language: | English English |
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2018
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| Online Access: | http://umpir.ump.edu.my/id/eprint/22082/ http://umpir.ump.edu.my/id/eprint/22082/1/5.%20Thickened%20holes%20edge%20including%20compressed%20rollover%20for%20improving.pdf http://umpir.ump.edu.my/id/eprint/22082/2/5.1%20Thickened%20holes%20edge%20including%20compressed%20rollover%20for%20improving.pdf |
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ump-22082 |
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eprints |
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ump-220822018-11-13T02:02:54Z http://umpir.ump.edu.my/id/eprint/22082/ Thickened holes edge including compressed rollover for improving tensile fatigue strength of thick sheet Zamzuri, Hamedon Yohei, Abe Ken-Ichiro, Mori Naoya, Nakagawa TJ Mechanical engineering and machinery TS Manufactures Body-in-white parts are generally punched to make many holes for joining, attachment and reduction in weight. The static strength of high strength steel sheets is almost proportional with the strength of the sheet, whereas the fatigue strength becomes gradually smaller. In addition, onset and progress of fatigue cracks of the punched high strength steel sheets are accelerated around holes due to concentration of stress, particularly for rough fracture surface and sharp burr of the sheared edge. For the purpose of improving fatigue strength of the steel sheet, the edge of the hole was thicken. Thus the fatigue strength was improved as compared to the normal piercing hole. However, in the thickening of the holes edge using punching process, rollover occurs at the top of holes edge and it lead to the occurrence crack due stretch of the sheets during the process. In order to further improve the stiffness and tensile fatigue strength, the shape of holes edge was altered by compressing the rollover of the holes edge of the thickening sheet. In this study, the effect the holes with thickening edge including compressed rollover formed by a punching on the tensile fatigue strength of sheets was investigated. It was found that the thickened and compressed holes edge of thick steel sheet are effective in improving tensile fatigue strengths. 2018-04 Conference or Workshop Item PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/22082/1/5.%20Thickened%20holes%20edge%20including%20compressed%20rollover%20for%20improving.pdf pdf en http://umpir.ump.edu.my/id/eprint/22082/2/5.1%20Thickened%20holes%20edge%20including%20compressed%20rollover%20for%20improving.pdf Zamzuri, Hamedon and Yohei, Abe and Ken-Ichiro, Mori and Naoya, Nakagawa (2018) Thickened holes edge including compressed rollover for improving tensile fatigue strength of thick sheet. In: Metal Forming 2018, 17th International Conference On Metal Forming, 16 -19 September 2018 , Loisir Hotel Toyohashi, Toyohashi, Japan. pp. 1-7.. |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
Universiti Malaysia Pahang |
| building |
UMP Institutional Repository |
| collection |
Online Access |
| language |
English English |
| topic |
TJ Mechanical engineering and machinery TS Manufactures |
| spellingShingle |
TJ Mechanical engineering and machinery TS Manufactures Zamzuri, Hamedon Yohei, Abe Ken-Ichiro, Mori Naoya, Nakagawa Thickened holes edge including compressed rollover for improving tensile fatigue strength of thick sheet |
| description |
Body-in-white parts are generally punched to make many holes for joining, attachment and reduction in weight. The static strength of high strength steel sheets is almost proportional with the strength of the sheet, whereas the fatigue strength becomes gradually smaller. In addition, onset and progress of fatigue cracks of the punched high strength steel sheets are accelerated around holes due to concentration of stress, particularly for rough fracture surface and sharp burr of the sheared edge. For the purpose of improving fatigue strength of the steel sheet, the edge of the hole was thicken. Thus the fatigue strength was improved as compared to the normal piercing hole. However, in the thickening of the holes edge using punching process, rollover occurs at the top of holes edge and it lead to the occurrence crack due stretch of the sheets during the process. In order to further improve the stiffness and tensile fatigue strength, the shape of holes edge was altered by compressing the rollover of the holes edge of the thickening sheet. In this study, the effect the holes with thickening edge including compressed rollover formed by a punching on the tensile fatigue strength of sheets was investigated. It was found that the thickened and compressed holes edge of thick steel sheet are effective in improving tensile fatigue strengths. |
| format |
Conference or Workshop Item |
| author |
Zamzuri, Hamedon Yohei, Abe Ken-Ichiro, Mori Naoya, Nakagawa |
| author_facet |
Zamzuri, Hamedon Yohei, Abe Ken-Ichiro, Mori Naoya, Nakagawa |
| author_sort |
Zamzuri, Hamedon |
| title |
Thickened holes edge including compressed rollover for improving tensile fatigue strength of thick sheet |
| title_short |
Thickened holes edge including compressed rollover for improving tensile fatigue strength of thick sheet |
| title_full |
Thickened holes edge including compressed rollover for improving tensile fatigue strength of thick sheet |
| title_fullStr |
Thickened holes edge including compressed rollover for improving tensile fatigue strength of thick sheet |
| title_full_unstemmed |
Thickened holes edge including compressed rollover for improving tensile fatigue strength of thick sheet |
| title_sort |
thickened holes edge including compressed rollover for improving tensile fatigue strength of thick sheet |
| publishDate |
2018 |
| url |
http://umpir.ump.edu.my/id/eprint/22082/ http://umpir.ump.edu.my/id/eprint/22082/1/5.%20Thickened%20holes%20edge%20including%20compressed%20rollover%20for%20improving.pdf http://umpir.ump.edu.my/id/eprint/22082/2/5.1%20Thickened%20holes%20edge%20including%20compressed%20rollover%20for%20improving.pdf |
| first_indexed |
2023-09-18T22:32:41Z |
| last_indexed |
2023-09-18T22:32:41Z |
| _version_ |
1777416390721929216 |