Abstract
In the paper, we consider a numerical simulation of torsional experiment and identification of elastoplastic properties of materials in such a test. The former is a direct problem. We consider a nonlinear boundary value problem, which is solved by means of the method of fundamental solutions and global radial basis function collocation method. The latter is an inverse problem, in which elastoplastic properties of materials are unknown. In order to solve it, we treat it as an optimization problem. We define an error between the measurements from torsional experiment and the results of simulations. To identify the parameters, we apply the virus optimization algorithm. The results show very good accuracy of the proposed approach.
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