Simulation of formability for hot stamping process

• Project/Area Number: 23760115
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Production engineering/Processing studies
• Research Institution: Hiroshima University
• Principal Investigator: HAMASAKI HIROSHI 広島大学, 工学(系)研究科(研究院), 助教 (30437579)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: プレス成形 / 高張力鋼板 / 温間成形 / 数値シミュレーション / スプリングバック / 高温成形 / 大ひずみ / 粘塑性変形 / パラメータ同定 / 熱間成形 / 材料モデル / CAE / 材料パラメータ同定

Research Abstract

Warm temperature uniaxial tension test was conducted for high strength steel sheet. The decrease of flow stresses were found as the increase of temperature and the decrease of strain rate. V and U shape bending tests were conducted at warm temperature. From the forming tests, it was found that warm forming is effective for the reduction of springback deformation. Additionally, relaxation during holding in the die is very effective to reduce springback. Finally, cyclic bending experiment was proposed to observe Bauschinger effect at warm temperature. It was found that the Bauschinger effect appeared even at the warm temperature.

Research Products

• [Journal Article] Elasto-Plasticity Property of High Strength Steel at Warm Temperature and Its Springback (2013)
  • Author(s): N. Saito, M. Fukahori, D. Hisano, Y. Ichikawa, H. Hamasaki, F. Yoshida
  • Journal Title: Key Engineering Materials Volume: Vols. 535-536 Pages: 385-388
  • Peer Reviewed
• [Journal Article] Elasto-Plastic Property of High Strength Steel at Warm Temperature and Its Springback (2013)
  • Author(s): Naoko Saito, Mitsugi Fukahori, Daisuke Hisano, Yuya Ichikawa, Hiroshi Hamasaki and Fusahito Yoshida
  • Journal Title: Key Engineering Materials Volume: 535-536 Pages: 385-388
  • Peer Reviewed
• [Presentation] 980MPa級高張力鋼板の温間繰返し変形特性 (2014)
  • Author(s): 市川祐也,佐々木尭,濱崎洋,吉田総仁,斎藤直子,深堀貢
  • Organizer: 日本機械学会中国四国支部第52期総会・講演会
  • Place of Presentation: 鳥取大学
  • Year and Date: 2014-03-07
• [Presentation] 980MPa級析出強化型熱延ハイテンの温間弾塑性挙動 (2013)
  • Author(s): 佐々木尭,市川祐也,濱崎洋,吉田総仁
  • Organizer: 日本機械学会中国四国学生会第43回学生員卒業研究発表講演会
  • Place of Presentation: 高知工科大学
  • Year and Date: 2013-03-17
• [Presentation] 高張力鋼板の温間弾塑性特性とスプリングバック (2012)
  • Author(s): 斉藤直子,深堀貢,久野大輔,市川祐也,濱崎洋,吉田総仁
  • Organizer: 平成24年度塑性加工春期講演会
  • Place of Presentation: 金沢(講演論文集, pp.49-50)
  • Year and Date: 2012-06-09
• [Presentation] 高張力鋼板の温間繰返し変形挙動の観察 (2012)
  • Author(s): 市川祐也,久野大輔,濱崎洋,日野隆太郎,吉田総仁
  • Organizer: 日本機械学会中国四国学生会第42回学生員卒業研究発表講演会
  • Place of Presentation: 広島大学
  • Year and Date: 2012-03-07