论文信息 - Upper- and lower-bound solutions to axisymmetric compression and extrusion problems

Upper- and lower-bound solutions to axisymmetric compression and extrusion problems

Abstract The method of approach for finding an admissible velocity field and an admissible stress field for axisymmetric forming problems is described, and the bounds for the loads in forming are obtained for compression of a cylinder between two parallel plates with maximum friction, for frictionless extrusion of a bar through square-cornered dies and for frictionless extrusion of a bar through tapered dies.

E. G. Thomsen | Erich G. Thomsen | Shiro Kobayashi | Shiro Kobayashi

[1] J.F.W. Bishop,et al. On the complete solution to problems of deformation of a plastic-rigid material , 1953 .

[2] W. Johnson,et al. The use of upper-bound solutions for the determination of temperature distributions in fast hot rolling and axi-symmetric extrusion processes , 1960 .

[3] Hideaki Kudo,et al. An upper-bound approach to plane-strain forging and extrusion—I , 1960 .

[4] Bounds for the load to compress plastically square discs between rough dies , 1961 .

[5] H. Kudo. Some analytical and experimental studies of axi-symmetric cold forging and extrusion—I , 1960 .

[6] J. M. Alexander. On complete solutions for frictionless extrusion in plane strain , 1961 .

[7] R. T. Shield,et al. The plastic indentation of a layer by a flat punch , 1955 .

[8] Rodney Hill,et al. A general method of analysis for metal-working processes , 1963 .