Effect of Surface Texture on Sheet Metal Formability in Boundary Lubrication Regime

Abstract:

Friction plays an important role on formability of deep drawn products. This necessitates an accurate description of friction in finite element formability analyses. It has been shown that constant coefficient of friction does not lead to precise prediction of product formability in these analyses. The multi-scale friction model developed at University of Twente takes the local contact conditions and textures of sheet metal and tools as the input at boundary and mixed lubrication regimes. To correlate the zinc coated sheet metal surface texture parameters with its formability, 60 different textures were analyzed. The multi-scale friction model is used to estimate friction for all the sheet metal surface textures. The effect of different textures on formability of the sheet metal was investigated by simulating cross-die forming using different sheet metal surface textures. The results show that different textures depict distinct formability behavior in the boundary lubrication regime (lubricant amount 0.1 gr/m²). Exploring the correlation between areal field parameters and formability of cross-die for the current dataset shows that besides surface roughness, autocorrelation length and skewness of height distributions are determining parameters.

• Periodical: Materials Science Forum (Volume 1184)
• Pages: 123-130
• DOI: https://doi.org/10.4028/p-0rBeB4
• Online since: April 2026
• Authors: Javad Hazrati*, Matthijn de Rooij
• Keywords: Formability, Friction, Sheet Metal Forming, Sheet Metal Texture

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