Application of the FEM to elastoplastic wave propagation in metals

Abstract

Under dynamic loading shock waves propagate in metallic materials and may be concentrated after reflection from fixed boundaries. In these cases high strain rate gradients are initiated in the material, which are accompanied by a change in temperature due to the adiabatic character of high rate deformation processes. In order to estimate the mechanical behaviour of the material under multiaxial dynamic loading constitutive equations must be worked out, which have to be valid over wide ranges of strain rate and temperature. Often a viscoplastic behaviour is assumed using the equation of Perzyna:

Citation

El‐Magd, E., Abdel‐Ghany, W. and Homayun, M. (1985), "Application of the FEM to elastoplastic wave propagation in metals", Engineering Computations, Vol. 2 No. 2, pp. 114-120. https://doi.org/10.1108/eb023609