Research of shear stress in shock-loaded conditions of porous material using molecular dynamics

摘要

Research of shear stress in shock-loaded conditions of porous material allows more detailed research - influence on phenomena's, occurring in the material at the passing in him the shock wave. We use computer simulation to study tense condition of porous material by means of the molecular dynamics (MD) method. MD-cell was taken at the form of the square-wave parallelepiped with the correlation of sides 3:1:1, in which was placed about 5000 particles. For making a pore from MD-cells was sliced area. containing 800 particles. Modeling shock-wave loading was produced by moving a wall MD-cells. Sample was divided into layers and in each layer we calculates physical values, in particular components of stress tensor. We calculated average pressure profiles and shear stress profiles at different moments of the time in transverse sections of sample. It was shown that slamming a time comes of the greater velocity, than velocity of shock wave in compact part of the sample. It was shown that at the considered time lag of simulation relaxation of shear stress is not observe.