RT Conference Proceedings
T1 The Upper Bound Theorem in forging processes: Model of Triangular Rigid Zones on parts with horizontal symmetry
A1 Martín-Fernández, Francisco de Sales
A1 Cañero-Nieto, Juan Miguel
A1 Martín-Sánchez, María Jesús
A1 Maldonado, Diego
AB The analysis to determine the necessary forces with which to achieve a plastic deformation in metallic materials, in particular, inforging processes and under conditions of plain strain, has been raised over the years through a double approach; on the onehand, by analytical methods that involve a great complexity in their developments but that allow a direct understanding of theparameters that direct these processes. On the other hand, numerical methods, in which, thanks to the enormous development ofcomputer technology, they provide solutions with a high approximation but, in most cases, do not allow to interpretindependently the effect of each one of the parameters that come into play. The development of computers relegated analyticalmethods to the background. An alternative of great interest to apply these methods comes from the study of the Upper BoundTheorem by means of the Triangular Rigid Zones (TRZ) Model. One of the main limitations in the application of this modelcome from the fact that it is necessary to define a kinematically admissible velocity field and for complex geometricconfigurations of parts, this field becomes increasingly complicated. A new approach has delimited, from a theoreticalperspective, a modular configuration based on a General Module formed by three TRZ that adapts to any geometry of flatsurfaces of the part. Another limitation of the Upper Bound Method is the consideration of the plain strain represented by a flatsection with double symmetry. Obviously, this imposition only allows to study a limited number of part configurations, whichrestricts its application in forging processes since the great majority of forged parts do not present geometrically this doublesymmetry. The present work releases one of these boundary conditions allowing to expand the possibilities of application of thismethod.
YR 2019
FD 2019-07-10
LK https://hdl.handle.net/10630/17997
UL https://hdl.handle.net/10630/17997
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026