Simulation of spall fracture of uranium at dufferent temperatures in the region of polymorphic phase transitions

This paper presents the results of numerical simulation of the Zaretskii's experiments on the loading of natural uranium in the temperature range 27–862$^\circ$ in the phase-transition region. Simulation of these experiments is of interest because of the observed features of spall fracture of uranium in the phase-transition region. Spall fracture and compaction was simulated using the DRK-L model of the dynamics of growth and compacting in a liquid medium, which takes into account the effect of strength properties, pressure, surface tension, viscosity, and inertia forces on the growth and collapse of pores. The calculations are carried out according to the UP program – a Lagrangian technique for calculating deformation problems of continuum mechanics in a one-dimensional approximation.