The XNOVAKTC Rheological Model.
Final rept. Nov 90-Apr 91
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
Pagination or Media Count:
The rheological model, which is incorporated in the NOVA family of interior ballistic codes Gough 1974, of which XNOVAKTC is the latest version, is examined in detail. The assumptions which are made in this model are also examined in detail. These assumptions are linked to the availability of experimental data, which may be used to guide constitutive modeling. Both empirical as well as analyticalexperimental models are presented to provide the required mathematical closure of the solid-phase model. Previous work in this constitutive modeling area is discussed. Interior ballistic simulations of realistic systems by XNOVAKTC are shown to predict values of intrinsic intergranular bed stress in excess of 100 MPa. However, available mixture stress vs. mixture density measurements have shown pronounced nonlinear behavior at values well below 100 MPa, which suggests that measurements are needed over a wider range of intrinsic stresses.
- Computer Programming and Software
- Fluid Mechanics