Method for Determining Friction Forces in Experiments on Shock Compression and Construction of Dynamic Stress–Strain Diagrams of Metals and Alloys

Аннотация

As a result of numerical and experimental investigation of the influence of friction forces on the dynamic strain of elastoviscoplastic samples (pellets), the main regularities of their formation have been established for metals and alloys. A new method of identification of the dry friction coefficients (according to Coulomb) on each contact surface depending on the formings of the lateral surface of the pellets is proposed; it is based on the numerical simulation of the axisymmetric dynamic problem and the rapidly convergent method of successive approximations. As a result, dynamic stress–strain diagrams are built taking into account the friction forces and radial inertia.