Thermostructural multiobjective optimization of a composite sandwich panel with lattice truss cores

ABSTRACTA composite sandwich panel with a lattice truss cores is optimized to better realize the function integration of load support and thermal management. Combinatorial optimization problems are constituted by the formulated objectives for relative density, specific modulus, specific strength, and structural maximum temperature under active cooling. Multiobjective optimization is used to determine the Pareto fronts, revealing the sensitivities of each problem to subobjectives and subobjective to variables. Simply continuous functions are applied to acceptably characterize the obtained optimal solutions, providing more extensive feasibilities for the engineering application. The results indicate that single sensitivity to core height is dominated and near-optimal core strut inclination angle is 45°.