Title:
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
Author(s)
Ciamarra, Massimo Pica
Lara, Antonio H.
Lee, Andrew T.
Goldman, Daniel I.
Vishik, Inna
Swinney, Harry L.
Lara, Antonio H.
Lee, Andrew T.
Goldman, Daniel I.
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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Date Issued
2004-05-14
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