Multi-scale friction modeling for sheet metal forming: The boundary lubrication regime

2015 ◽  
Vol 81 ◽  
pp. 112-128 ◽  
Author(s):  
J. Hol ◽  
V.T. Meinders ◽  
M.B. de Rooij ◽  
A.H. van den Boogaard
Keyword(s):  
Sheet Metal ◽  
Boundary Lubrication ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Friction Modeling ◽  
Multi Scale ◽  
Lubrication Regime

Friction Models for Metal Forming in the Boundary Lubrication Regime

1991 ◽  
Vol 113 (1) ◽  
pp. 60-68 ◽  
Author(s):  
William R. D. Wilson
Keyword(s):  
Boundary Lubrication ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Empirical Equation ◽  
Interface Pressure ◽  
Bulk Forming ◽  
Lubrication Regime ◽  
Friction Models ◽  
Semi Empirical ◽  
Unsteady Conditions

Wilson and Shen’s semi-empirical equation for the effective hardness of a plastically deforming workpiece is used to develop models for tool-workpiece friction in metal-forming processes operating in the boundary lubrication regime. The models treat both steady and unsteady conditions and include the influence of tooling and workpiece topography, sliding speed, interface pressure, and workpiece strain rate on friction. Simplified models are suggested for conditions typical of bulk forming and sheet-metal forming processes.

Multi-Scale Contact Modeling of Coated Steels for Sheet Metal Forming Applications

2018 ◽  
Vol 767 ◽  
pp. 223-231 ◽  
Author(s):  
Meghshyam Shisode ◽  
Javad Hazrati ◽  
Tanmaya Mishra ◽  
Matthijn de Rooij ◽  
Ton van den Boogaard
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Normal Load ◽  
Steel Substrate ◽  
Surface Textures ◽  
The Real ◽  
Multi Scale ◽  
Real Area Of Contact ◽  
Real Area

Friction in sheet metal forming is a local phenomenon which depends on continuously evolving contact conditions during the forming process. This is mainly influenced by local contact pressure, surface textures of the sheet metal as well as the forming tool surface profile and material behavior. The first step for an accurate prediction of friction is to reliably estimate real area of contact at various normal loads. In this study, a multi-scale contact model for the normal load is presented to predict asperity deformation in coated steels and thus to estimate the real area of contact. Surface profiles of the zinc layer and steel substrate are modelled explicitly obtained from confocal measurements. Different mechanical properties are assigned to the zinc coating and the steel substrate. The model was calibrated and validated relative to lab-scale normal load tests using different samples of zinc coated steel with distinct surface textures. The results show that the model is able to predict the real area of contact in zinc-coated steels for various contact pressures and different surface textures. Current multi-scale model can be used to determine the local friction coefficient in sheet metal forming processes more accurately.

A Multi-scale Friction Model for Sheet Metal Forming Simulations

2011 ◽  
Author(s):  
J. Hol ◽  
M. V. Cid Alfaro ◽  
T. Meinders ◽  
J. Huétink
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Friction Model ◽  
Multi Scale ◽  
Forming Simulations

scholarly journals Advanced friction modeling for sheet metal forming

Wear ◽  
2012 ◽  
Vol 286-287 ◽  
pp. 66-78 ◽  
Author(s):  
J. Hol ◽  
M.V. Cid Alfaro ◽  
M.B. de Rooij ◽  
T. Meinders
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Friction Modeling
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