|About this Abstract
||NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
||S-07: Computational Modelling of Scaled Processes and Experiments
||Anisotropic Scaling in Metal Forming
||Keith Davey, Rooholamin Darvizeh, Ali Golbaf, Hamed Sadeghi
|On-Site Speaker (Planned)
A new approach for scaled experimentation founded on the distortion of space has appeared in the recent literature. Although space cannot of course be distorted the new approach termed “finite similitude” contrasts the physics in a scaled space with that of a scaled experiment. Finite similitude takes a thermomechanics viewpoint and contrasts the transfers of physical quantities such as energy and momentum on a finite region of space. Presently however the theory has only being tested to any extent on isotropic scaling, which infers that geometric similarity is preserved.
The consequence of breaking geometric similarity is investigated in this paper for a traditional metal forming process. The traditional approach to scaled experimentation is dimensional analysis but its application to metal forming is limited because for practical processes similarity is known not to exist. In addition, although reference to anisotropic scaling is made for dimensional analysis, it is performed on the basis of ad hoc rules which simply serve to extend the parameter set and consequently provide limited insight.
Shown in the paper is how finite similitude provides a firm foundation for anisotropic scaling revealing new scaling rules for material behaviour. A numerical example has been performed to illustrate the advantages of anisotropic scaling.