高速貫入時に砂中物体が受ける力の検討

抄録

High speed penetration experiments have been practiced in many fields, and impact experiments were performed using the powder gun within a velocity of 150-510 m/s. Packing density of sand is varied several kinds. Impact and penetration speed of a projectile were measured by coil method that is contactless. The behavior of projectile changed at transition speed and the acceleration of projectile was expressed two equations depending on the speed region. In this research, calculateing coefficient related to forces to act projectile was conducted, and try to make clear forces of projectile during high-speed penetration in sand.