APPLICATION OF A RELAXATION MODEL OF FRACTURED VISCOELASTICITY FOR THE DESCRIPTION OF HIGH-EXPLOSIVE SPECIMEN TESTING USING A SPLIT-HOPKINSON PRESSURE BAR
O. M. Velichko
VANT. Ser.: Mat. Mod. Fiz. Proc 2019. Вып.4. С. 32-50.
A single-material viscoelastic model of a fractured medium is considered, which has been formulated based on publications of US authors, and its modification for viscous relaxation and fracture growth kinetics is presented. An approximate computational algorithm accelerating the process of model fitting for an HMX-based high explosive has been developed. The fitting is based on the criterion of acceptable agreement between calculated data and results of HE specimen testing on a split-Hopkinson pressure bar apparatus from a publication of Russian authors. Numerical modeling of HE specimen deformation is performed based on a computational model implemented by the Godunov method. Keywords: HE, deformation and fracture, fractured viscoelastic model, Godunov method, numerical modeling.
|
English
