Multi-objective optimization of laminated plates under a non-uniform in-plane load for maximize buckling load

This paper presents a Multi-objective optimal design of simply supported asymmetric laminated composite rectangular plates subjected to linearly varying in-plane static loads for which the critical failure mode is buckling. The aim of the multi-objective function is to maximize the buckling load capacity and minimize the thickness of laminated plates and the fiber orientation, layer thickness, and number of layer are considered as design variables. The buckling problem of laminated plate is analyzed by Rayleigh–Ritz method. For Multi-objective optimization, Non-dominated Sorting Genetic Algorithm (NSGA-II) method is used. A MATLAB code was written for the purposes. The effect of thickness, number of layers, fiber orientation and aspect ratio on the results are investigated and compared.