Abstract: A sandwich panel core that may be comprised of a lattice structure utilizing a network of hierarchical trusses, synergistically arranged, to provide support and other functionalities disclosed herein. Since this design results in a generally hollow core, the resulting structure maintains a low weight while providing high specific stiffness and strength. Sandwich panels are used in a variety of applications including sea, land, and air transportation, ballistics, blast impulse mitigation, impact mitigation, thermal transfer, ballistics, load bearing, multifunctional structures, armors, construction materials, and containers, to name a few.