Multi-Objective Optimization of Geometrical Parameters of Composite Sandwich Panels with an Aluminum Honeycomb Core for an Improved Energy Absorption

The low-velocity impact response of aluminum honeycomb sandwich panels with composite face sheets is investigated using an LS-DYNA-based finite-element simulation. The finite-element model incorporates the damage, delamination, and failure capabilities, and a verification analysis of the results found. Suitable prediction models for the specific energy absorption and peak load at different values of geometrical parameters of the panels are developed using the response surface methodology. The effects of face sheet thickness, cell size, cell height, and cell thickness on the specific energy absorption and peak load are investigated. A multi-objective optimization of the panels is carried out for the maximum specific energy absorption and the minimum peak load.