RELAXATION MODEL FOR SHEAR STRENGTH IN LAGRANGIAN-EULERIAN FORMULATION
S.M. Bakhrakh, I.P. Bakumova, P.N. Nizovtsev, V.A. Raevsky, E.V. Shuvalova
VANT. Ser.: Mat. Mod. Fiz. Proc 2002. Вып.4. С. 3-8.
The paper presents a model, describing a process of shear strength relaxation both in Lagrangian and Eulerian formulations. When generalizing to flows in Eulerian variables recalculation rules of all values, describing strength are set. It provided a way for computing a large class of problems on relaxation model on Lagrangian and Eulerian grids. The model is implemented in program complex LAGAK for computing 2D time-dependent continuum flows in Lagrangian and Eulerian variables. Relaxation model produces good results in pressure range P  10-65 GPa, specifically it enables describing experimental results of instability development calculations.
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