Experimental determination of the coefficient of restitution for meter-scale granite spheres
Icarus, 2011•Elsevier
We present results of a series of large-scale experiments to measure the coefficient of
restitution for 1-m-diameter rocky bodies in impacts with collision speeds up to∼ 1.5 ms− 1.
The experiments were conducted in an outdoor setting, with two 40-ton cranes used to
suspend the∼ 1300-kg granite spheres pendulum-style in mutual contact at the bottoms of
their respective paths of motion. The spheres were displaced up to∼ 1m from their rest
positions and allowed to impact each other in normal-incidence collisions at relative speeds …
restitution for 1-m-diameter rocky bodies in impacts with collision speeds up to∼ 1.5 ms− 1.
The experiments were conducted in an outdoor setting, with two 40-ton cranes used to
suspend the∼ 1300-kg granite spheres pendulum-style in mutual contact at the bottoms of
their respective paths of motion. The spheres were displaced up to∼ 1m from their rest
positions and allowed to impact each other in normal-incidence collisions at relative speeds …
We present results of a series of large-scale experiments to measure the coefficient of restitution for 1-m-diameter rocky bodies in impacts with collision speeds up to ∼1.5ms−1. The experiments were conducted in an outdoor setting, with two 40-ton cranes used to suspend the ∼1300-kg granite spheres pendulum-style in mutual contact at the bottoms of their respective paths of motion. The spheres were displaced up to ∼1m from their rest positions and allowed to impact each other in normal-incidence collisions at relative speeds up to ∼1.5ms−1. Video data from 66 normal-incidence impacts suggest a value for the coefficient of restitution of 0.83±0.06 for collisions between ∼1-m-scale spheres at speeds of order 1ms−1. No clear trend of coefficient of restitution with impact speed is discernable in the data.
Elsevier
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