Numerical simulation of the mechanical state of the two-stage multi-anvil high pressure apparatus

The computational schemes and algorithms for numerical simulation (by the finite element method) of the mechanical state of the two-stage multi-anvil high-pressure apparatus have been developed. The stress-strain and limit states of components of the first and second stages of the apparatus at generation of the pressure 18 GPa in the container have been defined. The effect of geometrical parameters and physico-mechanical properties of a deformed gasket and second stage anvils on the limit state of the latter as well as the pressures achievable in HPA has been studied. The anvils produced of tungsten-cobalt hard alloys of different grades and polycrystalline boron nitride have been considered.