Taking into account the effects of shear and angular momentum we present the evolution of nonlinear density perturbations of the system. Starting from the standard spherical collapse model in which these terms are left we present a physically motivated condition which specifies the dependence of these term on µ. The new idea is a Taylor series expansion in (1/µ) to model the nonlinear epoch, and it leads to the formation of stable structures in which the gravitational collapse is halted at around the virial radius.