Two-dimensional modeling of high-velocity impingement of polymethylmethacrylate plates

31st International Conference on Equations of State for Matter

Popova, T.V.^1 ; Mayer, A.E.^1 ; Khishchenko, K.V.^2

Chelyabinsk State University, Bratiev Kashirinykh Street 129, Chelyabinsk

454001, Russia^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^2

关键词: 2D simulations;    Hydrodynamic calculation;    Polymer materials;    Shock wave velocity;    Two dimensional model;    Visco-elastic mediums;    Viscoelastic properties;    Weak shock waves;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/774/1/012066/pdf
DOI  :  10.1088/1742-6596/774/1/012066

来源: IOP

【 摘 要 】

Using modification of Maxwell model of viscoelastic medium, we have performed 2D simulations of the polymethylmethacrylate (PMMA) plates impingement at high velocities. Previously, we had investigated numerically the influence of the viscoelastic properties upon the dynamics of 1D shock-wave flows in PMMA. It was shown that, in a limit of weak shock waves, the accounting of the viscoelastic properties allows one to achieve a better agreement of calculated results and experimental data on the shock wave velocity magnitude than in the case of hydrodynamic calculations. In the present work, we make a generalization of the polymer material deformation model to the case of 2D stress state. The equation is written for the plastic deformation tensor, which describes the relaxation of the maximal shear stress.