Effect of Longitudinal Grooves on Survivability of Cylindrical Steel Projectiles Fired against Simulated Concrete Targets
Abstract
Small hollow, cylindrical steel projectiles containing longitudinal grooves on the inner surface were fired against simulated concrete targets. These firings complement earlier firings of projectiles containing circumferential grooves. The grooves in both cases were intended to simulate the stress-raising effects of warhead shear-control grids. Some projectiles were filled with an explosive simulant, while others were left unfilled. All projectiles tested developed a bulge near the front of the internal cavity. This can be termed the primary failure zone. The presence of longitudinal grooves in this region reduced the survival velocity, while grooves located a short distance to the rear had no effect. The reduction in survival velocity for projectiles with longitudinal grooves was less than for projectiles with circumferential grooves o the same depth. Significant differences between the deformation and failure behavior of the filled and unfilled projectiles were observed. From the standpoint of warhead design, the conclusion to be drawn from this work is that a shear-control grid can be machined into the case of a penetrator warhead without affecting its survivability providing that the grid is not allowed to extend into the primary failure zone.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1982
- Accession Number
- ADA121935
Entities
People
- J. C. Schulz
- O. E. Heimdahl
Organizations
- Naval Air Weapons Station China Lake