Hello,
I would like to ask a question about how particle position affects torque.
In the DEM simulation, basically is apply the normal load to the upper rigid body, bring the upper rigid body and lower rigid body together, and then apply the angular velocity to the lower rigid body, these two rigid body twist against each other.
An annular contact surface is formed when two rigid bodies are in contact, and then spherical particles are applied to the contact area. I found that if all particles are placed on one side, the measured torque is large, while if the particles are on both sides or evenly distributed in the annular contact area, the measured torque becomes smaller.
So, I was wondering whether a relationship exists between particle position on the contact area and torque.
Could you please share your ideas or provide any references?
Many thank,
Chao
Yes, the distribution of particle positions can affect the torque experienced by a system. Torque is defined as the rotational equivalent of force, and it arises from the application of a force at a distance from a rotational axis. In the case of a system of particles, the torque is the sum of the torques on each individual particle.
The torque on a particle depends on its position relative to the rotational axis, as well as the magnitude and direction of the force acting on it. Therefore, if the distribution of particle positions changes, the torque experienced by the system can also change.
For example, if the particles are distributed symmetrically around the rotational axis, the net torque on the system may be zero, since the torques on opposite sides of the axis cancel each other out. However, if the particles are more densely distributed on one side of the axis than the other, the net torque on the system will not be zero and will depend on the total force acting on the particles.
In summary, the distribution of particle positions can affect the torque experienced by a system, since the torque is the sum of the torques on each individual particle, and the torque on a particle depends on its position relative to the rotational axis and the force acting on it.
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