Prediction of void closure in a slab during various deformation processes

• Published in: Journal of mechanical science and technology Vol. 25; no. 11; pp. 2871 - 2876
• Main Author: Park, Jong-Jin
• Format: Journal Article
• Language: English
• Published: Heidelberg Korean Society of Mechanical Engineers 01-11-2011; Springer Nature B.V; 대한기계학회
• Subjects: Applied sciences; Closures; Compressing; Control; Cross sections; Dynamical Systems; Engineering; Exact sciences and technology; Forging; Forging and extrusion; Forming; Fundamental areas of phenomenology (including applications); Industrial and Production Engineering; Inelasticity (thermoplasticity, viscoplasticity...); Mechanical Engineering; Metals. Metallurgy; Physics; Position (location); Production techniques; Series (mathematics); Slabs; Solid mechanics; Structural and continuum mechanics; Vibration; Voids; 기계공학; Finite element method; Deformation; Pore; Closure; Void; Forgings; Aspect ratio; Modeling; Forging; Inelasticity; Cavity; Plane strain; Plasticity; Principal stress
• DOI: 10.1007/s12206-011-0811-3
• EISSN: 1976-3824
• ISSN: 1738-494X

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.