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Sliding Distance Dependency and Third Body Particle Influence in Flat Strip-Draw Testing of Aluminum Sheet for Friction Characterization in Automotive Stamping

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Abstract:

In automotive sheet metal stamping, the friction coefficient for a given tribological system (sheet, lubricant, tool surface) is known to depend on contact pressure, sliding velocity and temperature. Furthermore, plastic deformation of the sheet can cause surface roughening, which will affect frictional response. Beyond these known effects, the flat strip-draw experiments using friction pads of various sizes and repeated sliding on the same sample presented in this paper indicate that the frictional response depends on the sliding distance and sliding history. Moreover, we found that third body particles generated by the wear of sheet metal in frictional processes substantially influence the level of the friction shear force and its characteristics with respect to the initial static (breakaway) peak. Our results suggest that there is a need to improve the friction models implemented in current commercially available simulation software for aluminum sheet metal stamping, to capture these substantial effects.

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Periodical:

Materials Science Forum (Volume 1184)

Pages:

97-112

DOI:

https://doi.org/10.4028/p-5Z5Vcu

Citation:

Cite this paper

Online since:

April 2026

Authors:

Loris Rocchi*, Jan Filzek, Christian Leppin

Keywords:

Automotive Aluminum Sheet, Flat Strip-Draw Test, Sliding Distance, Third-Body Particles

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Creative Commons CC BY 4.0

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* - Corresponding Author

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