Soybean impacts: experiments and dynamic simulations
1997
LoCurto, G.J. | Zhang, X. | Zakirov, V. | Bucklin, R.A. | Vu-Quoc, L. | Hanes, D.M. | Walton, O.R.
The coefficient of restitution of soybeans impacting aluminum, glass, and acrylic was measured for drop heights of 15.1 cm, 29.2 cm, and 51.1 cm and at moisture contents of 10.7% and 15.5% (db). Statistically significant changes in the coefficient of restitution were produced by changes in material surface, drop height and moisture content. Changes in moisture content from 10.7% to 15.5% (db) reduced the average coefficient of restitution from 0.69 to 0.59, a decrease of approximately 14%. Over the range of impact velocities tested (1.7 to 3.2 m/s produced by crops from heights from 15.1 cm to 51.1 cm) the coefficient of restitution was relatively insensitive to velocity, decreasing by less than 5% from 0.65 to 0.62. The measured values of coefficient of restitution were used as inputs to algorithms describing the behavior of a single bouncing soybean. The algorithm predicted reasonable results when compared to the observed behavior of dropped soybeans.
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