FACTORS RELATED TO PROPELLANT-DRIVEN ANCHORING IN ROCK

The penetration into rocks comprising the ocean floor by propellant-dr iven model projectiles and their resistance to extraction at oblique a ngles were investigated both experimentally and numerically. The requi red static and dynamic friction coefficients between steel and rock we re also measured. Targets were examined subsequent to impact by sectio ning and by means of X-rays. The projectile penetration into soft sand stone target was simulated using DYNA2D. The scaling law for the obliq ue pull-out case has been established by using a similarity analysis. The holding capacity of prototype projectiles was predicted for data o btained from the model pull-out experiments.