Interface-dominated nanolayered crystalline composites exhibit extraordinary strength and hardness, far beyond those of their constituent materials. Modeling the deformation of such materials would aid in understanding and designing them for future applications. This task is a multiscale effort. Up to now, most modeling efforts lie at either the atomic scale or the mesoscale. Models that link the two scales are missing. In this work, we develop some tools that aim to help in making this important connection.