abstract = "We compare genetic algorithm (GA) and genetic
programming (GP) for system modelling in metal forming.
As an example, the radial stress distribution in a
cold-formed specimen (steel X6Cr13) was predicted by GA
and GP. First, cylindrical workpieces were forward
extruded and analysed by the visioplasticity method.
After each extrusion, the values of independent
variables (radial position of measured stress node,
axial position of measured stress node, and coefficient
of friction) were collected. These variables influence
the value of the dependent variable, radial stress. On
the basis of training data, different prediction models
for radial stress distribution were developed
independently by GA and GP. The obtained models were
tested with the testing data. The research has shown
that both approaches are suitable for system modeling.
However, if the relations between input and output
variables are complex, the models developed by the GP
approach are much more accurate.",
notes = "A1 Laboratory for Intelligent Manufacturing Systems,
University of Maribor, Faculty of Mechanical
Engineering, Maribor, Slovenia
A2 Laboratory for Material Forming, University of
Maribor, Faculty of Mechanical Engineering, Maribor,
Slovenia",