The computer simulation of tribological influence on strain path and forming limit in punch stretching of sheet metal

Authors
Citation
Tc. Hsu et Ts. Yang, The computer simulation of tribological influence on strain path and forming limit in punch stretching of sheet metal, INT J ADV M, 17(6), 2001, pp. 393-399
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Engineering Management /General
Journal title
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
ISSN journal
0268-3768 → ACNP
Volume
17
Issue
6
Year of publication
2001
Pages
393 - 399
Database
ISI
SICI code
0268-3768(2001)17:6<393:TCSOTI>2.0.ZU;2-I
Abstract
The purpose of this paper is to describe the principles and results of some numerical simulations of strain path and forming limit analysis in punch s tretching operations which include the tribological influence by using a re alistic friction model. Three tribological variables (i.e. the mean lubrica nt film thickness, tooling roughness, and workpiece roughness) are required for the simulation. The calculation of these variables using lubrication t heory and related semi-empirical equations are described. The active lubric ation regime and suitable friction model can be determined from the current local values of these tribological variables. Friction stress can then be computed from these variables combined with more traditional parameters suc h as pressure and sliding speed. The limiting dome height and variation of strain path are then predicted by using the coupled FEM and lubrication/fri ction model. The comparison between the calculated and measured results sho ws that the present scheme is efficient in computation and will provide a u seful tool for industrial applications.