  This study aims mainly at investigating the effects of concircular flatness
and concircular symmetry of a warped product manifold on its fibre and base
manifolds. Concircularly flat and concircularly symmetric warped product
manifolds are investigated. The divergence free concircular curvature tensor on
warped product manifolds is considered. Finally, we apply some of these results
to generalized Robertson-Walker and standard static space-times.
