A theoretical model for estimating the effective elastic modulus of particulate hybrid composites is proposed. A concept of "equivalent virtual volume fraction" is in troduced in order to take interaction among a matrix and inclusions into account. The model is illustrated by the effective shear modulus of particulate hybrid composites based upon a modified self-consistent method for two-phase composites. The obtained results reflect the influence of the matrix phase geometry more adequately than simple "self-consistent" models.
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