Spherical Acrylic Plastic Hulls under External Explosive Loading.

摘要

NEMO-type acrylic spherical hulls have been subjected to underwater explosions in order to determine their resistance to hydrodynamic impulse loading. Six 15-in. -OD and one 66-in. -OD spheres have been subjected to explosions of sufficient magnitude to initiate fracture in the hull. The tests were conducted at simulated depths of 10, 100, 1000, and 2000 ft with explosive charges of 1.1, 8.2, 14.6, 169.9, 387.8, and 688.6 grams. Fractures were generally initiated on the internal surface of the sphere at two locations; (1) at a point closest to the explosive and (2) at a point farthest from the explosive. The fractures were generally in the shape of a star.