Dynamics of drag and force distributions for projectile impact in a granular medium

Details Dynamics of drag and force distributions for projectile impact in a granular medium Dynamics of drag and force distributions for projectile impact in a granular medium

2003-12-08

arxiv.org/abs/physics/0312054v2

Physics

Fluid Dynamics

4 pages

Scientific paper

10.1103/PhysRevLett.92.194301

Our experiments and molecular dynamics simulations on a projectile penetrating a two-dimensional granular medium reveal that the mean deceleration of the projectile is constant and proportional to the impact velocity. Thus, the time taken for a projectile to decelerate to a stop is independent of its impact velocity. The simulations show that the probability distribution function of forces on grains is time-independent during a projectile's penetration of the medium. At all times the force distribution function decreases exponentially for large forces.

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