Dynamics of drag and force distributions for projectile impact in a granular medium
Author(s)
Ciamarra, Massimo Pica
Lara, Antonio H.
Lee, Andrew T.
Vishik, Inna
Swinney, Harry L.
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Abstract
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 deceleration in the medium. At all times the force distribution function decreases exponentially for large forces.
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2004-05-14
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