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A model of a grain kernel impacting on a steel plate was developed. The rebound motion of a kernel depended on the kernels organic properties and irregular shape. A tangential velocity component was developed after impact if eccentric kernel impact occurred. The effects of grain type, moisture, size, kernel release height, and impact plate angle on grain kernel rebound properties were studied. Among these factors, only the impact plate angle had a significant effect on rebound directions; the grain type, impact plate angle, and kernel release height were the three significant factors affecting the resultant restitution coefficient of a grain kernel. The rebound angle a affected both the tangential and normal rebound velocity but not the energy ratio.
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Yang et al. (1994) studied this question.
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