• 제목/요약/키워드: 3-dimensionally coupled electromagnetic-mechanical phenomenon

검색결과 1건 처리시간 0.016초

수치적 변수들이 배면판을 이용한 고강도 강판의 전자기 성형 해석에 미치는 영향도 분석 (Sensitivity Analysis of Numerical Variables Affecting the Electromagnetic Forming Simulation of a High Strength Steel Sheet Using a Driver Sheet)

  • 박현일;이진우;이영선;김지훈;김대용
    • 소성∙가공
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    • 제28권3호
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    • pp.159-166
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    • 2019
  • Electromagnetic forming (EMF) simulations consider 3-dimensionally coupled electromagnetic-mechanical phenomenon using LS-DYNA, therefore the calculation cost is normally expensive. In this study, a sensitivity analysis in regard to the simulation variables affecting the calculation time was carried out. The EMF experiments were conducted to form an elliptically protruding shape on a high-strength steel sheet, and it was predicted using LS-DYNA simulation. In this particular EMF simulation case, the effect of several simulation variables, viz., element size, contact condition, EM-time step interval, and re-calculation number of the EM matrices, on the shape of elliptical protrusion and the total calculation time was analyzed. As a result, reasonable values of the simulation variables between the simulation precision and calculation time were proposed, and the EMF experiments with respect to the charging voltages were successfully predicted.