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Article
Intermediate Shapes in Closed-Die Forging By the Backward Deformation Optimization Method (BDOM)
Journal of Materials Engineering and Performance
  • Raghavan Srinivasan, Wright State University - Main Campus
  • G. H. K. Reddy
  • S. S. Kumar
  • Ramana V. Grandhi, Wright State University - Main Campus
Document Type
Article
Publication Date
8-1-1994
Abstract
During closed-die forging, the billet is deformed through one or more intermediate shapes before achieving the final forged shape. Designers rely on handbooks and experience to choose a few of the limitless number of intermediate shapes that are possible. A finite element method and optimization- based design technique for tracing the deformation back from the final to the initial shape is developed. Because plastic deformation is an irreversible process, no unique path exists between the initial and final shapes. Unlike previous backward tracing methods, the backward deformation optimization method (BDOM) selects the optimum path based on constraints placed on the deformation of the workpiece. Minimization of the variation in effective strain rate within the workpiece is used to determine the sequence of workpiece nodes to be detached from the die. Examples of intermediate shapes for the forging of a disk and a ball-joint socket demonstrate this design technique.
DOI
10.1007/BF02645317
Citation Information
Raghavan Srinivasan, G. H. K. Reddy, S. S. Kumar and Ramana V. Grandhi. "Intermediate Shapes in Closed-Die Forging By the Backward Deformation Optimization Method (BDOM)" Journal of Materials Engineering and Performance Vol. 3 Iss. 4 (1994) p. 501 - 513 ISSN: 1059-9495
Available at: http://works.bepress.com/raghavan_srinivasan/45/