Hi all,

I am new to Lammps. I just started with a simple 3D problem in which spheres are packed in FCC style inside a cube. I wanted to do discrete element analysis hence I chose atom type sphere. I described the initial positions of the atoms by an input file and I also created the boundary atoms and gave them as input file. I picked up one particle from the whole assembly and imparted a displacement in the form of sin pulse to the particle in the Y direction. I wish to study how the wave propagates due to shear in the X direction. There is some problem with my input file commands as i was not able to see any particles moving in the X direction. Even in the Y direction particle movements are very minimal compared to the input displacement I have given. I have attached the input file.