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In most manufacturing processes for polymer matrix composites (PMCs) one starts with dry bundles of fibers. On resin infusion, the initially closed-pack fibers are spread out to the degree dictated by the intended fiber volume fraction, resulting in disordered fiber distributions and defects such as voids in the matrix. Pores, manufacturing defects, holes and round notches are locations where fatigue cracks may initiate or arrest, depending on the loading conditions. We introduce a new peridynamic model for materials with pores based on an Intermediate Homogenization Model (IHM). We investigate how the new model compares with the classical homogenization approach for dynamic elasticity as well as for crack and damage evolution. This model will allow us to model pores, voids, manufacturing defects in a composite material without having to represent the exact shape and size of such defects, which would require a very costly, fine discretization for computing the solution.