Electromagnetic emission under uniaxial compression of ice: II. Analysis of the relationship between an electromagnetic signal and the dynamics of charged dislocation pile-ups

The nature of the electrical activity of mesoscopic defects in I_h ice and the relationship of this activity with the kinetics of plastic deformation and fracture is discussed. The theoretical time dependences of the shear caused by active dislocation pile-ups are compared with the shapes of actual electromagnetic signals generated in different stages of the plastic deformation of I_h ice. Good agreement with the model of free expansion of a conservative dislocation pile-up and the model of nucleation and propagation of a slip band is established.