Smoothly waning, symmetrically expanding, cavity-pressure loads in earth materials
Abstract
An approximate solution for the pressure loading required to expand a spherical cavity in rock and soil targets is derived. A dual characterization of fracture and flow material model is used. Frictional resistance to flow is also included. Nonlinear volumetric strain hardening is modeled with bilinear curves and unloading is assumed to be nondilative. Applications of this solution form to the prediction of pressure loading on slender, convex-nosed earth penetrators and on spherically nosed water entry vehicles are discussed.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- January 1982
- Bibcode:
- 1982STIN...8319955P
- Keywords:
-
- Cavities;
- Nose Cones;
- Ogives;
- Projectiles;
- Rocks;
- Soils;
- Terminal Ballistics;
- Equations Of Motion;
- Fracture Mechanics;
- Velocity Distribution;
- Engineering (General)