Collaborative optimization of heat dissipation and load capacity for sandwich structures with carbon fiber reinforced lattice truss cores

The overall heat transfer coefficients and equivalent pressure loss of lattice truss sandwich structures were derived in analytical forms as well thermal performance index was defined in heat dissipation analysis. The overall effective stiffness of lattice truss sandwich structure was analyzed by continuum method combined with classical lamination theory and series parallel model. Multifunctional collaborative optimal design for sandwich structures with carbon fiber reinforced lattice truss cores was presented with satisfying heat dissipation and load capacity constraints, the optimum weight of sandwich structures was obtained using discrete hybrid optimization method based on branch and bound approach. The results demonstrate that pyramidal lattice truss sandwich structures provide higher levels of heat dissipation efficiency and load capacity, more ultralight and efficiently, by analyzing and comparing different types of truss cores.