Damping Force Effect with Respect to Time and Displacement of Two Identical Spheres using Discrete Element Method
International Journal of Engineering Trends and Technology (IJETT)  

© 2018 by IJETT Journal  
Volume64 Number1 

Year of Publication : 2018  
Authors : Oleena S H 

DOI : 10.14445/22315381/IJETTV64P208 
Citation
MLA Style: Oleena S H "Damping Force Effect with Respect to Time and Displacement of Two Identical Spheres using Discrete Element Method" International Journal of Engineering Trends and Technology 64.1 (2018): 4347.
APA Style:Oleena S H (2018). Damping Force Effect with Respect to Time and Displacement of Two Identical Spheres using Discrete Element Method. International Journal of Engineering Trends and Technology, 64(1), 4347.
Abstract
The objective of this contribution is to present a numerical simulation method to model the collision of particles in a plane using objectoriented techniques. The method chosen is the Lagrangian timedriven method and it uses the position, and the velocity of particles as independent variables. These are obtained by time integration of the twodimensional dynamics equations which were derived from the classical Newtonian mechanics approach based on the second law of Newton for the translational motion of each particle in the granular material. This includes keeping track of all forces acting on each particle at every timestep. Contact forces depend on the overlap geometry, material properties and dynamics of particles and include normal components of repulsion force. The background version of DEM and time integration algorithm are developed and implemented into C++ code. The implementation of timeintegration algorithm is verified by simple test concerning particleparticle interaction for which analytical expression exist. In this paper Damping force due to particle – particle contact at different time step and displacement are investigated.
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Keywords
DEM simulation, Granular materials, Elastic effect