The micromechanics of composites with multiple phases of different shapes embedded into
a matrix phase, typically requires symmetrization strategies for their homogenized elasticity
tensors, in particular so if the popular Mori–Tanaka estimate is employed. We here explore
the implications of such symmetrization techniques, on the concentrations tensors, ie on the
relations between macroscopic strains imposed onto a representative volume element of
microelastic matter, and the microscopic phase strains developing across the materials' …