Gradient-based optimisation of rectangular honeycomb core sandwich panels

Abstract When subjected to bending loads, sandwich panels are highly efficient structural components with the potential achieve substantial weight reduction. A successful design methodology for should aim at maximising this reduction while considering various possible failure mode in a simple yet accurate manner. This paper investigates application of steel as two-way deck systems. Near-optimal designs all-steel Rectangular Honeycomb Core Sandwich Panels (RHCSPs) under general out-of-plane loading achieved using gradient-based optimisation method. The method relies on continuously optimising limit state constraints response considered priori analysis stage simplified analytical assessment. Plate solutions and used alternatives estimate internal stresses each layer panel where comparisons made between these two methods terms computational efficiency accuracy. then formulate equations relevant mode, including material yielding, plate buckling deformation control. Method Moving Asymptotes is RHCSPs, states problem objective function be minimised. proposed assessment verified against detailed nonlinear finite element models optimal solutions. implications results strategy development systematic RHCSPs also highlighted, making specific reference critical modes.