Zobrazeno 1 - 10 of 59 pro vyhledávání: '"Noritoshi IWATA"'
5
CAE-based process design for improving formability in hot stamping with partial cooling
Autor: Eiichi Ota, Noritoshi Iwata, Hidekazu Nishigaki, Yasuhiro Yogo
Publikováno v: Journal of Materials Processing Technology. 263:198-206
A CAE-based process design method was developed to improve formability in hot stamping by controlling the temperature distribution during the forming step. Specifically, areas where deformation is not desired should be cooled to make them harder, and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::626de81cb82965a10b61bbdbf086e8b0
https://doi.org/10.1016/j.jmatprotec.2018.08.021
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6
Investigation of Hardness Change for Spot Welded Tailored Blank in Hot Stamping Using CCT and Deformation-CCT Diagrams
Autor: Nozomi Kurato, Noritoshi Iwata, Yasuhiro Yogo
Publikováno v: Metallurgical and Materials Transactions A. 49:2293-2301
When an outer panel of a B-pillar is manufactured with the hot stamping process, reinforcements are spot welded on its inner side. Before reinforcements are added, the microstructure of the outer panel is martensite. However, reheating during spot we
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::40822f0622645bb7e2b8b4d69c0c4e99
https://doi.org/10.1007/s11661-018-4602-7
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8
A novel approach of springback analysis using a drawbead and a die shoulder database in sheet metal forming simulation
Autor: Noritoshi Iwata, Takamichi Iwata
Publikováno v: The International Journal of Advanced Manufacturing Technology. 95:3535-3547
Springback in sheet metal forming is a deformation that occurs when a workpiece is released from dies after forming. Prediction of springback using the finite element method (FEM) has been used in the design of stamping dies. The present paper descri
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::53a07d5e2ff02d224bd066d0870facb1
https://doi.org/10.1007/s00170-017-1471-y
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9
Stress-strain curve measurements of aluminum alloy and carbon steel by unconstrained-type high-pressure torsion testing
Autor: Yasuhiro Yogo, Noritoshi Iwata, Sawamura Masatoshi, Nobuki Yukawa
Publikováno v: Materials & Design, Vol 122, Iss, Pp 226-235 (2017)
In measurements of stress-strain (SS) curves, it is difficult to achieve a large strain, i.e., 5 (500%), which is introduced in actual metal forming processes. Recently, a constrained-type high-pressure torsion test was applied and allowed measuremen
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0babb48831206730295472ae77717f17
https://doi.org/10.1016/j.matdes.2017.03.007
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10
Stress-strain curve of pure aluminum in a super large strain range with strain rate and temperature dependency
Autor: Risa Harada, Yasuhiro Yogo, Noritoshi Iwata, Sawamura Masatoshi, Kosei Miyata, Takashi Ishikawa
Publikováno v: Procedia Engineering. 207:161-166
Recently, a high pressure torsion testing method was developed to measure stress - strain curves in a super large strain range, e.g. over 10. In this paper, through improvement of the method to measure strain rate and temperature dependencies, SS cur
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::36dc39698a15a8f3ab604a0fd7616149
https://doi.org/10.1016/j.proeng.2017.10.755
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