Ratio of Loss and Storage Moduli Determines Restitution Coefficient in Low-Velocity Viscoelastic Impacts
نویسندگان
چکیده
منابع مشابه
Scaling of the normal coefficient of restitution for wet impacts
A thorough understanding of the energy dissipation in the dynamics of wet granular matter is essential for a continuum description of natural phenomena such as debris flow, and the development of various industrial applications such as the granulation process. The coefficient of restitution (COR), defined as the ratio between the relative rebound and impact velocities of a binary impact, is fre...
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A gas of particles which collide inelastically if their impact velocity exceeds a certain value is investigated. In difference to common granular gases, cluster formation occurs only as a transient phenomenon. We calculate the decay of temperature due to inelastic collisions. In spite of the drastically reduced dissipation at low temperature the temperature surprisingly converges to zero.
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We report two-dimensional simulations of strongly vibrated granular materials in zero gravity. The coefficient of restitution depends on the impact velocity between particles by taking into account both the viscoelastic and plastic deformations of particles, occurring at low and high velocities respectively. Use of this realistic restitution coefficient leads to new unexpected behaviors. When t...
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A new method to solve the collision problems of slender bars with massive external surfaces is developed. The proposed solution accounts for the effect of impact induced vibrations and multiple collisions on the post collision velocities of the impacting members. The approach is based on representing the vibrational energy of the bars during the collision process in terms of a non-dimensional p...
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ژورنال
عنوان ژورنال: Frontiers in Mechanical Engineering
سال: 2020
ISSN: 2297-3079
DOI: 10.3389/fmech.2020.00003