A viscoelastic micropolar peridynamic model for quasi-brittle materials incorporating loading-rate effects

A viscoelastic micropolar peridynamic (VMPD) model is proposed to describe the nonlinear deformation and fracture behaviors of quasi-brittle materials considering loading-rate effects. The governing equations of bonds connecting material points are reformulated by introducing the definition of bond deformation rates. Two peridynamic parameters, corresponding to the normal stiffness and the tangential stiffness of the bond, respectively, are...