Engineering and Computer Science Faculty Grants

Title

Using Three Dimensional Polycrystal Plasticity for the Modeling of Surface Roughening During Bulk Deformation

Document Type

Grant

Date

1995

Keywords

three dimensional polycrystal plasticity, surface roughening, bulk deformation

Funding Agency

National Center for Supercomputing Applications

Comments

(This grant was for 250 hours of CPU time at one of the national supercomputing centers - there was no monetary award). A three dimensional finite element code with a polycrystal plasticity model is used to predict the development of surface roughness during underlying bulk deformation. Surface roughness is an important issue for many metalforming industries, especially automobile and beverage can companies. The orientation of individual grains in the material results in anisotropic behavior, and the surface grains, due to their individual orientations, do not deform uniformly. As a result, a roughening of the surface occurs. To model this development, a polycrystal finite element model will be used. The code, specifically developed for running on the CM-5 machine, takes advantage of the parallel processing environment to perform element and grain level computations in parallel. Numerous simulations will be performed to investigate the effect of various process parameters on the development of surface roughness and a concurrent experimental program will provide data for validation of the numerical simulations.

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