한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제21권3호
  • /
  • Pages.98-104
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  • 2013
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  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
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Gurson모델을 사용한 전자기성형의 성형성 개선에 대한 연구

Study on Formability Enhancement of Electromagnetic Forming using Gurson Plasticity Material Model

  • 김정 (부산대학교 항공우주공학과) ;
  • 송우진 (부산대학교 부품소재산학협력연구소) ;
  • 강범수 (부산대학교 부품소재산학협력연구소)
  • Kim, Jeong (Department of Aerospace Engineering, Pusan National University) ;
  • Song, Woojin (Industrial Liaison Innovation Center, Pusan National University) ;
  • Kang, Beomsoo (Industrial Liaison Innovation Center, Pusan National University)
  • 투고 : 2012.08.14
  • 심사 : 2012.10.09
  • 발행 : 2013.05.01
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초록

The effect of the tool-sheet interaction on formability enhancement in electromagnetic forming is investigated using FEM. A free bulging and a conical forming die with 0.7mm AL1050 sheet are used to evaluate damage evolution based on Gurson-Tvergaard-Needleman plasticity material model. The impact between the tool and sheet results in complex stress states including compressive hydrostatic stresses, which leads to a suppression of void growth and restrain ascending void volume fraction of the sheet. Therefore, the damage suppression due to the tool-sheet interaction can be the main factor contributing to the increased formability in the electromagnetic forming process.

키워드

참고문헌

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피인용 문헌

  1. Development of Electrohydraulic Forming Apparatus and Its Experimental Study vol.25, pp.2, 2017, https://doi.org/10.7467/KSAE.2017.25.2.236
  2. Experimental validation of numerical modeling of electrohydraulic forming using an al 5052-H34 sheet vol.93, pp.5-8, 2017, https://doi.org/10.1007/s00170-017-0612-7