FINITE ELEMENT HOMOGENIZATION OF NANOPOROUS ELASTIC MATERIAL OF THE HEXAGONAL CLASS OF SYMMETRY WITH SURFACE EFFECTS

Effective moduli of nanoporous beryllium with simple random and open structures of porosity were studied using effective modulus and finite element methods. Nanosized effects were modeled within the framework of the Gurtin-Murdoch model of interface stresses. Modeling and solving the homogenization problems were performed in the ANSYS package, while structures of representative volumes with open porosity were generated in the ACELAN-COMPOS package. The influence of porosity, types of representative volumes and pore sizes on the values of effective moduli of nanoporous beryllium were analyzed.