| Project/Area Number |
20360070
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Production engineering/Processing studies
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
HINO Ryutaro 広島大学, 大学院・工学研究院, 准教授 (10283160)
UEMORI Takeshi 近畿大学, 工学部, 講師 (70335701)
HAMASAKI Hiroshi 広島大学, 大学院・工学研究院, 助教 (30437579)
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| Project Period (FY) |
2008 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2010: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2009: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2008: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
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| Keywords | 成形加工 / 高機能難加工板材 / 弾塑性構成モデル / 成形限界 / 熱間加工 / CAE / 冷・熱間加工 |
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| Research Abstract |
Elasto-viscoplastic material behaviors of several types of sheet metals, such as high strength steel, stainless steel, aluminum, magnesium and titanium sheets, at various temperatures were experimentally investigated. Based on the experimental observations, macro constitutive models for these metals were proposed and they have been installed into CAE code LS-DYNA. Meso-plasticity models based on the crystal plasticity theory were also proposed to discuss the effect of the texture on the anisotropy of sheet metals. Furthermore, forming limits under stretch forming, stretch bending and hole expansion were investigated, and new criteria of forming limits were newly proposed. The validity of the proposed material models and the forming limit criteria have been verified by performing sheet metal forming simulations.
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