Investigating Stresses Developed during Mechanical Forming of Steel through Finite Element Analysis

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Investigating Stresses Developed during Mechanical Forming of Steel through Finite Element Analysis

S.A. Akinlabi, O.S. Fatoba, E.T. Akinlabi

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Stresses majorly affect the mechanical properties of materials. However, structural failures are often caused by the combined effect of residual stresses and applied stresses. It is practically impossible for a manufactured component to be entirely free of residual stresses because these stresses developed during the manufacturing process and certain amount remain in the component even after the process is completed. This study reports the findings of the investigation into the developed stresses during mechanical forming of the steel sheet. The result revealed that the Von Mises stresses developed, increases during the forming process. Also, the original tensile stresses in the material changed to compressive stresses along the inner radius as the punch strokes increases. Lastly, it was observed that the locked in stresses in the material after the process were tensile in nature and such are not beneficiary to the structural integrity of the manufactured component even though an average value of 0.057540 MPa was recorded for this study at the bend radius, distance away from the neutral plane.

Keywords
Finite Element Analysis, Stresses and Structural Integrity

Published online 4/20/2018, 6 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: S.A. Akinlabi, O.S. Fatoba, E.T. Akinlabi, ‘Investigating Stresses Developed during Mechanical Forming of Steel through Finite Element Analysis’, Materials Research Proceedings, Vol. 4, pp 29-34, 2018

DOI: http://dx.doi.org/10.21741/9781945291678-5

The article was published as article 5 of the book

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] G. Joo, H. Huh and M.K. Choi, Tension/Compression hardening behaviors of auto-body Steel Sheets at Intermediate strain rates, International Journal of Mechanical Science 108-109 (2016) 174-187. https://doi.org/10.1016/j.ijmecsci.2016.01.035
[2] H. Huh, J. H. Lim and S. H. Park, High speed tensile test of steel sheets for the stress – strain curve at the intermediate strain rate, Int J Automot Technol 2009 10(2) 195–204. https://doi.org/10.1007/s12239-009-0023-3
[3] M.A. Meyer, Dynamic behavior of materials, John Wiley & Sons, N. Y, U.S.A, 1994. https://doi.org/10.1002/9780470172278
[4] D.R. Ambur, C.B. Prasad, and W.A. Waters Jr., A dropped-weight apparatus for Low Speed impact testing of composite structures Exp Mech 35 (1995) 77–82. https://doi.org/10.1007/BF02325839
[5] N.S. Rossini, M. Dassisti, K.Y. Benyounis, and A.G. Olabi. Methods of measuring residual stresses in Samples, Material and Design, 35 (2012) 572-588. https://doi.org/10.1016/j.matdes.2011.08.022
[6] TWI Knowledge Summary, 2015, www.twico.uk/j32/protected/band_3/ksrh1001.html [Accessed February 2017].
[7] P.J. Withers, Residual stress and its role in failure, Report of progress in Physics 70 (2007) 2211-2264. https://doi.org/10.1088/0034-4885/70/12/R04
[8] M.T. Flaman, Investigation of ultra-high speed drilling for residual stress measurements by the Centre-hole method, Experimental Mechanics 1982 22(1) 26-30. https://doi.org/10.1007/BF02325700
[9] E. Kannatey-Asibu, Principle of Laser Materials Processing, John Wiley & sons, Inc., N.Y., 2009. https://doi.org/10.1002/9780470459300
[10] Sheet Metal Processes, http://nptel.ac.in/courses/112107144/6 [Accessed March 2017].
[11] G.H. Bae and H. Huh, Tension/compression test of auto-body steel sheets with the variation of the pre-strain and the strain rate, In: Proc. 5th Int. Conf. on Computational Methods and Experiments in Materials Characterisation, Kos, Greece. 2011. https://doi.org/10.2495/MC110191
[12] S. Choudhry and J.K. Lee, Dynamic plane-strain finite element simulation of industrial sheet-metal forming processes, Int J Mech Sci 36 (1994) 189–207. https://doi.org/10.1016/0020-7403(94)90069-8
[13] H. Tze-Chi and C. Chan-Hung, A finite element analysis of sheet metal forming processes, Journal of Materials Processing Technology 54 (1995) 70-75. https://doi.org/10.1016/0924-0136(95)01922-7