Crystal plasticity finite element modelling of surface asperity flattening during uniaxial planar compression

As an important parameter of surface quality, surface asperity of cold metal

manufacturing products is an interesting topic in metal forming. In order to figure out

the relationship between these parameters and the surface asperity flattening, a finite

element model is employed in the commercial finite element software ABAQUS to

simulate the surface asperity flattening of Al plate along the rolling direction during

uniaxial planar compression. At the certain applied strains, the surface grain of the

sample tends to rotate and stretch along the celtain axis. With an increase of reduction,

the texture tends to strong and obvious. When the applied strains are low, the roughness

increment in rolling direction is proportional to the applied strain. The grain size also has

significant influence on the surface asperity. With an increase of grain size, the surface

roughness tends to decrease slowly, and after the compression, the sample with the

maximum grain size has the maximum surface roughness.