Carbon nanotube (CNT) network materials constitute a broad class of multifunctional materials that possess a unique combination of structural, mechanical and transport properties, making them attractive for various aerospace applications. The complexity of the hierarchical multiscale organization of the CNT materials, wide diversity of material structures and variability of physical properties present a challenge for theoretical evaluation of the structure-properties relationships and define the critical role the computational modeling can play in designing the advanced CNT materials. A team of researchers from the University of Virginia and University of Alabama will work on the development of a robust mesoscopic model capable of bridging the gap between the behavior and properties of nanoscale structural features of CNT-based materials revealed in atomistic simulations and the effective macroscopic properties defined by the collective behavior of multiple nanotubes and their interaction with a polymer matrix. The capabilities of the model will be demonstrated in analysis of the structural, mechanical, and transport properties of the CNT materials and nanocomposites. The results of the proposed study will facilitate the development of multifunctional low-density materials with unique combination of mechanical and transport properties tailored for aerospace applications.