Abstract
Voids in a slab need to be closed by plastic deformation during rolling or forging processes. However, the progress of the void closure differs for the location of a void since the stress distribution in the slab is inhomogeneous. In the present investigation, the voids were assumed to be cylindrical and aligned in the thickness direction, and the void closure at any location was attempted to be predicted during the plane-strain compression in the width direction. A series of finite element analyses were performed, and as a result relations among principal strains, minor axis and aspect ratio of the cross section of a void were obtained with which the prediction of the void closure became possible. Applications of these relations to forging and rolling processes were successfully performed.
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This paper was recommended for publication in revised form by Associate Editor Youngseog Lee
Jong-Jin Park has been working in the area of the finite-element analysis for metal forming processes. After achievements of B.S from Seoul National University, and M.S and Ph.D from U.C. Berkeley, he worked at Battelle Memorial Institute for seven and half years and joined Hongik University, Korea, since 1991. He is the president of the Korean Society for Technology of Plasticity in the year of 2011.
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Park, JJ. Prediction of void closure in a slab during various deformation processes. J Mech Sci Technol 25, 2871–2876 (2011). https://doi.org/10.1007/s12206-011-0811-3
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DOI: https://doi.org/10.1007/s12206-011-0811-3