The purpose of this paper was to address an equivalence between a single layer and three layered cranial bone models for intracranial content impact injuries by using composite mechanics approach. A homogenized material model was utilized to model the three layered system of cranial bones as a single layered system. A set of equivalent homogenized material properties can be formulated systematically with confidence. Numerical verifications were carried out by simulating two ball models and a 50th percentile human head model by using finite element approach, which shows that it maximizes modeling and computation economy without sacrificing solution accuracy of variables for evaluating intracranial content injuries. The discrete bone materials were assumed as linear, elastic, and isotropic. So, the resultant equivalent material was anisotropic.