Modelling of metal forming processes.

Prediction of Instability in Planar Anisotropic Sheet Metal Forming Processes

In this paper instability of planar anisotropic sheet metal during a few forming processes is investigated for the first time. For this reason components of the constitutive tangent tensor for planar anisotropic sheets are developed. By using the above tensor location of necking is predicted. Direction of the shear band is also predicted using the acoustic tensor. A finite element program is pr...

Finite Element Modelling of Forging and Other Metal Forming Processes

The fundamental mechanical formulation is recalled for simulation of metal forming processes. The basic principles of 3-dimensional finite element discretization and of time integration are summarized. Several important numerical developments for efficient computation of large plastic deformation are briefly described. Various fields of applications to real processes are reviewed. Illustrative ...

Wrinkling Prediction Procedure in Thin Sheet Metal Forming Processes with Adaptive Mesh Refinement Part II : Wrinkling with contact Project Title Modelling of Sheet Metal Forming Project Number ME97033 Cluster Modelling of Forming of Metal and Laminate Products Author

Development of computer-aided design systems for metal-forming processes

TYPE OF COMMUNICATION (tick the appropriate box) x Scientific paper Book PhD Thesis Proceedings AUTHORS Name Title (Pr./Dr...) Y.N. Mitani Atisa Atkins, S.A. DE C.V., Mexico, Mexico H. R. Raya Merchand Atisa Atkins, S.A. DE C.V., Mexico, Mexico E. Ortiz Velazquez Atisa Atkins, S.A. DE C.V., Mexico, Mexico EDITION REFERENCE Editor name* Editor coordinates Location in the document Volume, pages C...

Photoelastic Investigation of Metal-forming Processes Using New Sapphire Dies

Sapphire dies (of single-crystal aluminum oxide) are used to obtain interfacial conditions along the contact surface of the die in a strip-drawing operation. Several solutions based on slip-line field analysis and upper-bound techniques are available for metal-forming problems. However, these solutions generally neglect elasticity and work-hardening and assume that friction is constant along th...