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Material Model for Strain-Induced Surface Roughening of Sheet Metal

Published

Author(s)

Y Shim, Mark R. Stoudt, Lyle E. Levine, Stephen W. Banovic, Richard J. Fields

Abstract

A generic model for strain-induced surface roughening has been derived from a statistical analysis of experimental data from aluminum alloys. The model predicts the surface roughening in sheet metal as a function of strain and grain size. Our analyses reveal that the rms roughness increases linearly when a surface scan length is smaller than the average grain size, and show that for a given scan length, the rms roughness increases also linearly with plastic strain and the average grain size. The linear increase with scan length implies the roughness exponent 1. It is also shown that the formation of slip bands within grains results in small-scale surface fluctuations and plays a minor role in the large-scale behavior.
Citation
Proceedings of the 5th International Conference & Workshop on Numerical Simulation of 3D Sheet Forming Processes

Keywords

grain structure, plastic deformation, strain-induced surface roughening, the mean step size, the rms roughness

Citation

Shim, Y. , Stoudt, M. , Levine, L. , Banovic, S. and Fields, R. (2002), Material Model for Strain-Induced Surface Roughening of Sheet Metal, Proceedings of the 5th International Conference & Workshop on Numerical Simulation of 3D Sheet Forming Processes (Accessed February 24, 2024)
Created April 30, 2002, Updated October 12, 2021