Porous glass under oscillatory shear deformation

This video shows a sequence of atomic configurations of the porous glass under oscillatory shear with the strain amplitude 0.12 during 2000 shear cycles. It can be seen that the porous structure in the quiescent glass is composed of small isolated pores and extended, highly tortuous channels. With increasing number of cycles, the evolution of the porous network becomes more apparent as larger pores are formed. Moreover, after about 1000 cycles, the small-size pores become essentially expelled from the glass phase and solid strands are formed across the system due to periodic boundary conditions and the constraint of constant volume. These structural changes in periodically driven porous glasses were quantified by computing the distribution of spheres with different diameters that fill the porous network using open-source Zeo++ software developed at the Lawrence Berkeley National Laboratory (http://www.zeoplusplus.org).

N.V. Priezjev and M.A. Makeev, “The influence of periodic shear on structural relaxation and pore redistribution in binary glasses”, J. Non-Cryst. Solids 506, 14 (2019).

https://doi.org/10.1016/j.jnoncrysol....

#molecular #dynamics #simulations #porous #metallic #glass #LAMMPS