Methodology for the Selection of Optimal Parameters of the Finite Element Mesh in Composite Materials Calculation

The paper presents a methodology for evaluating the convergence of the results of composite part model calculations. The aim of the paper is to describe an algorithm for optimizing the strength calculations of the composite part structure by adjusting the parameters of the finite element mesh. The convergence is evaluated by sequentially varying the dimensions of the finite element mesh. The paper describes the difference of nonlinear calculation and its peculiarities relevant to the calculation of composite parts having surface contact of different materials. NX Nastran SolidEdge ST10 is used as the solver. Calculations of a composite specimen made of metal and metal-polymer were used to analyze the results. The parameters of the materials used in the calculations were used both from the built-in reference books and from the manufacturers’ data sheets. Among the analyzed calculation data, the parameters of safety margin, deformations and stresses were used. The results of the calculations have been systematized and presented in the form of appropriate graphs. The influence of the finite element mesh size on the accuracy of the results obtained and the expediency of using a finite element mesh with minimum dimensions are evaluated. The conclusion describes recommendations for the use of the proposed methodology for use by design engineers in the development of composite and other component designs in a nonlinear analysis.