소성∙가공 (Transactions of Materials Processing)

  • 제26권1호
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  • Pages.41-47
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  • 2017
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  • 1225-696X(pISSN)
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  • 2287-6359(eISSN)
한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
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전변형과 굽힘을 이용한 초고강도 철강 판재의 반복 거동 측정

Measurement of Cyclic Behavior of Advanced High Strength Steel Sheets Based on Pre-straining and Bending

  • 투고 : 2016.11.14
  • 심사 : 2017.01.12
  • 발행 : 2017.02.01
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초록

Cyclic behavior of advanced high strength steel sheets was measured using an inverse-optimization approach with pre-straining and bending. First, tensile specimens were pre-strained, and three-point bending was conducted for the pre-strained specimens. By using the inverse finite element optimization, the combined isotropic-kinematic hardening parameters that minimize the error between the measured and predicted bending force-displacement curves. The measured cyclic behavior agreed well with the cyclic behavior measured by sheet tension-compression test, which confirms the validity of the measuring procedure based on inverse optimization.

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참고문헌

  1. R. H. Wagoner, H. Lim, M. G. Lee, 2013, Advanced Issues in Springback, Int. J. Plast., Vol. 45, pp. 3-20. https://doi.org/10.1016/j.ijplas.2012.08.006
  2. J. H. Kim, D. Kim, Y. S. Lee, M. G. Lee, K. Chung, H. Y. Kim, R. H. Wagoner, 2013, A Temperature-Dependent Elasto-plastic Constitutive Model for Magnesium Alloy AZ31 Sheets, Int. J. Plast., Vol. 50, pp. 66-93. https://doi.org/10.1016/j.ijplas.2013.04.001
  3. R. K. Boger, R. H. Wagoner, F. Barlat, M. G. Lee, K. Chung, 2005, Continuous, Large Strain, Tension/compression Testing of Sheet Material, Int. J. Plast., Vol. 21, No. 12, pp. 2319-2343. https://doi.org/10.1016/j.ijplas.2004.12.002
  4. T. Kuwabara, 2007, Advances in Experiments on Metal Sheets and Tubes in Support of Constitutive Modeling and Forming Simulations, Int. J. Plast., Vol. 23, No. 3, pp. 385-419. https://doi.org/10.1016/j.ijplas.2006.06.003
  5. M. G. Lee, J. H. Kim, D. Kim. O. S. Seo, N. T. Nguyen. H. Y. Kim, 2013, Anisotropic Hardening of Sheet Metals at Elevated Temperature: Tension-Compressions Test Development and Validation, Exp. Mech., Vol. 53, No. 6, pp. 1039-1055. https://doi.org/10.1007/s11340-012-9694-1
  6. S. L. Zang, M. G. Lee, L. Sun, J. H. Kim, 2014, Measurement of the Bauschinger Behavior of Sheet Metals by Three-point Bending Springback Test with Pre-strained Strips, Int. J. Plast., Vol. 59, pp. 84-107. https://doi.org/10.1016/j.ijplas.2014.03.015
  7. J. A. Nelder, R. Mead, 1965, A Simplex Method for Function Minimization, Comput. J., Vol. 7, No. 4, pp. 308-313. https://doi.org/10.1093/comjnl/7.4.308
  8. K. Chung, M. G. Lee, D. Kim, C. Kim, M. L. Wenner, F. Barlat, 2005, Spring-back Evaluation of Automotive Sheets Based on Isotropic-kinematic Hardening Laws and Non-quadratic Anisotropic Yield Functions Part I: Theory and Formulation, Int. J. Plast., Vol. 21, No. 5, pp. 861-882. https://doi.org/10.1016/j.ijplas.2004.05.016