Relation between flange fracture and blankholder force in the process of cylindrical deep drawing of AZ31B rolled magnesium alloy sheets

Masahiro Okawa, Shigeki Mori, Tomohiro Murakami, Akito Takasaki

研究成果: Article

抄録

The fracture occurring at the flange edge in the process of cylindrical deep drawing of AZ31B magnesium alloy sheets was investigated. The fractures were simulated under a uniaxial in-plane compression test to classify the fracture types while the blankholder force of the sheet was varied. Two types of fractures, out-of-plane shear fracture (OPSF), and in-plane shear fracture (IPSF), were observed. The fracture types changed from OPSF to IPSF as the blankholder force increased to a drawing ratio of approximately 1.5-1.6. This implies that the fracture type could be controlled by changing the blankholder force. The transition from OPSF to IPSF increased the fracture strain, because the out of plane buckling of the alloy sheets was suppressed by the blankholder force. The results confirmed that, in cylindrical deep drawing, the limiting drawing ratio could be increased by restraining the flange edge of the alloy sheets with the sufficient blankholder force.

元の言語English
ページ(範囲)113-119
ページ数7
ジャーナルKeikinzoku/Journal of Japan Institute of Light Metals
69
発行部数2
DOI
出版物ステータスPublished - 2019 1 1

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Deep drawing
Flanges
Magnesium alloys
Buckling

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

これを引用

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title = "Relation between flange fracture and blankholder force in the process of cylindrical deep drawing of AZ31B rolled magnesium alloy sheets",
abstract = "The fracture occurring at the flange edge in the process of cylindrical deep drawing of AZ31B magnesium alloy sheets was investigated. The fractures were simulated under a uniaxial in-plane compression test to classify the fracture types while the blankholder force of the sheet was varied. Two types of fractures, out-of-plane shear fracture (OPSF), and in-plane shear fracture (IPSF), were observed. The fracture types changed from OPSF to IPSF as the blankholder force increased to a drawing ratio of approximately 1.5-1.6. This implies that the fracture type could be controlled by changing the blankholder force. The transition from OPSF to IPSF increased the fracture strain, because the out of plane buckling of the alloy sheets was suppressed by the blankholder force. The results confirmed that, in cylindrical deep drawing, the limiting drawing ratio could be increased by restraining the flange edge of the alloy sheets with the sufficient blankholder force.",
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T1 - Relation between flange fracture and blankholder force in the process of cylindrical deep drawing of AZ31B rolled magnesium alloy sheets

AU - Okawa, Masahiro

AU - Mori, Shigeki

AU - Murakami, Tomohiro

AU - Takasaki, Akito

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The fracture occurring at the flange edge in the process of cylindrical deep drawing of AZ31B magnesium alloy sheets was investigated. The fractures were simulated under a uniaxial in-plane compression test to classify the fracture types while the blankholder force of the sheet was varied. Two types of fractures, out-of-plane shear fracture (OPSF), and in-plane shear fracture (IPSF), were observed. The fracture types changed from OPSF to IPSF as the blankholder force increased to a drawing ratio of approximately 1.5-1.6. This implies that the fracture type could be controlled by changing the blankholder force. The transition from OPSF to IPSF increased the fracture strain, because the out of plane buckling of the alloy sheets was suppressed by the blankholder force. The results confirmed that, in cylindrical deep drawing, the limiting drawing ratio could be increased by restraining the flange edge of the alloy sheets with the sufficient blankholder force.

AB - The fracture occurring at the flange edge in the process of cylindrical deep drawing of AZ31B magnesium alloy sheets was investigated. The fractures were simulated under a uniaxial in-plane compression test to classify the fracture types while the blankholder force of the sheet was varied. Two types of fractures, out-of-plane shear fracture (OPSF), and in-plane shear fracture (IPSF), were observed. The fracture types changed from OPSF to IPSF as the blankholder force increased to a drawing ratio of approximately 1.5-1.6. This implies that the fracture type could be controlled by changing the blankholder force. The transition from OPSF to IPSF increased the fracture strain, because the out of plane buckling of the alloy sheets was suppressed by the blankholder force. The results confirmed that, in cylindrical deep drawing, the limiting drawing ratio could be increased by restraining the flange edge of the alloy sheets with the sufficient blankholder force.

KW - Deep drawing

KW - Flange edge fracture

KW - Magnesium alloy sheet

KW - Uniaxial in-plane compression

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