PSi shear modulus as function of porosity. Numerical results for uniform displacements (empty squares) and uniform traction (full squares) conditions and interpolations (solid line) representing the upper and lower bounds of the homogenized shear modulus as function of porosity. Curves are always underneath the Voigt theoretical upper bound (dashed line).
Martini et al. Nanoscale Research Letters 2012 7:597 doi:10.1186/1556-276X-7-597