Shearing simulation with ductile fracture based on neutron diffraction measurement

• Project/Area Number: 25420078
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Production engineering/Processing studies
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Sunaga Hideyuki 国立研究開発法人理化学研究所, 光量子工学研究領域, 研究員 (70442978)
• Co-Investigator(Kenkyū-buntansha): TAKAMURA Masato 国立研究開発法人理化学研究所, 光量子工学研究領域, 研究員 (00525595) ; OTAKE Yoshie 国立研究開発法人理化学研究所, 光量子工学研究領域, チームリーダー (50216777)
• Co-Investigator(Renkei-kenkyūsha): TAKETANI Atsushi 国立研究開発法人理化学研究所, 光量子工学研究領域, 副チームリーダー (30222095)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: せん断加工 / 弾塑性FEM / 中性子計測 / 延性破壊

Outline of Final Research Achievements

The simulation of fracture propagation is a highly nonlinear problem that is difficult to solve using elastoplastic FE codes, mainly because of the sudden change in the force equilibrium situation in fracture. Simulations of shearing processes of steel plates were carried out and the results showed good correlation with the experimental results. It was proved to be sufficiently robust and accurate to treat shear cutting.
A neutron diffraction measurement was performed to reveal microstructural aspects of the ductile fracture in ferritic steel. The diffraction patterns were continuously measured until the end of the fracture process. The measurement results showed that the volume fraction of the specified plane in lattices {110} for the axial loading direction increased almost proportionally to the material elongation during necking. The effect of the fracture was observed as a change in the volume fraction of {110} prior to the actual fracture.

Research Products

• [Journal Article] Advanced Metal Forming Simulations Coupled with Neutron Beam Technology (2014)
  • Author(s): Masato Takamura, Hideyuki Sunaga, Shunsuke Mihara, Atsushi Taketani and Yoshie Ohtake
  • Journal Title: Physics Procedia Volume: 60 Pages: 238-243
  • DOI: 10.1016/j.phpro.2014.11.033
  • Peer Reviewed / Open Access
• [Presentation] Texture evaluation in ductile fracure process by neutron diffraction (2016)
  • Author(s): H.Sunaga,M.Takamura,Y.Ikeda,Y.Otake,T.Hama,M.Kumagai,H.Suzuki,S,Suzuki
  • Organizer: NUMISHEET2016
  • Place of Presentation: Marriott Bristol City Hotel, Bristol, UK
  • Year and Date: 2016-09-04
• [Presentation] 金属延性破壊に基づくせん断加工シミュレーション (2015)
  • Author(s): 須長秀行，高村正人，見原俊介
  • Organizer: 理研シンポジウム
  • Place of Presentation: 理研鈴木梅太郎ホール 和光市広沢 埼玉県
  • Year and Date: 2015-11-13
• [Presentation] 小型中性子源を用いた中性子回折測定による鉄集合組織の観測 (2015)
  • Author(s): (4)池田義雅，高村正人，鈴木裕士，浜孝之，大場洋次郎，熊谷正芳
  • Organizer: 鉄鋼協会第169回春季講演大会
  • Place of Presentation: 東京都 東大駒場Ⅰキャンパス
  • Year and Date: 2015-03-18
• [Presentation] RANSにおける中性子回折実験の取り組み (2015)
  • Author(s): (3)池田義雅，高村正人，竹谷篤，須長秀行，大竹淑恵，浜孝之，鈴木裕士，熊谷正芳，大場洋次郎
  • Organizer: 理研シンポジウム「小型中性子源によるものづくり材料変化の透かし撮りへの挑戦」
  • Place of Presentation: 和光市 理化学研究所
  • Year and Date: 2015-01-16
• [Presentation] 中性子ビーム計測と弾塑性FEMによる金属のメゾスケール変形解析 (2014)
  • Author(s): 高村正人，池田義雅，竹谷篤，須長秀行，大竹淑恵
  • Organizer: 理研シンポジウム 第2回「光量子工学研究」
  • Place of Presentation: 仙台市 仙台市情報・産業プラザ
  • Year and Date: 2014-11-25 – 2014-11-26
• [Presentation] 理研小型中性子源システムRANS (2014)
  • Author(s): (1)池田義雅，高村正人，竹谷篤，須長秀行，王盛，橋口孝夫，関義親，山田雅子，太田秀男，見原俊介，柳町信三，大竹淑恵
  • Organizer: 理研シンポジウム 第2回「光量子工学研究」
  • Place of Presentation: 仙台市 仙台市情報・産業プラザ
  • Year and Date: 2014-11-25