Smolin I.Y.   Eremin M.O.   Makarov P.V.  

Modeling of deformation and failure of model brittle porous materials mesovolumes

Reporter: Smolin I.Y.

To describe the mechanical response of brittle porous material mesovolumes the evolutionary approach was applied. The nonlinear constitutive equations describe damage accumulation and their impact on the degradation of the elastic and strength properties of the elastic frame. In the framework of hierarchical modeling the mesoscale porosity is taken into account explicitly while micropores are included in the damage parameter.  We considered two types of model porous structures morphology: overlapping spherical pores and overlapping spherical solids. The obtained results of numerical simulations reveal little influence of pore morphology on the characteristics of damage in the frame. The averaged stress-strain diagram is sensitive not only to the value of porosity but also to the pore morphology. The strength limit has analogous dependence.