Comparação de técnicas numéricas para análise de metais no regime plástico

Abstract

This monography is dedicated to compare numerical techniques used in Finite Element Method (FEM) for structural analysis of metal components in the plastic regime. The finite element code is performed by Abaqus. The numerical techniques involved are number of load increments, incremental control, nonlinear systems method, yield criteria and finally, hardening model. Firstly, a case of a square plate with a circular center hole was studied in relation to the tests involving different configurations of the variables mentioned above and, via an analysis of efficiency, it was determined which was the most satisfactory configuration.. In turn, the last choice was extended for the following case in regards to the numerical simulation of a specimen subjected to uniaxial tensile. This case was based on an experimental study found in the literature in which the main objective was to compare the numerical and experimental results (in structural terms) related to plastic behavior in order to see if the techniques used were satisfactory and consistent with the values obtained experimentally. Finally, still using the same configuration chosen in the first case, a vehicular suspension component was simulated in order to analyze the metal plastic regime. As a result, the current work presents the features and the influence of each numerical technique under plastic behavior of metals related to structural analysis. the results in general were satisfactory. There were small deviations of final values of von Mises and Tresca equivalent stresses to the nodal points of the studied cases. The results in general were satisfactory, showing average errors ranging from 1.66% to 16.63%. Additionally, the simulated cases converged in a range between 10.2 and 260.9 seconds depending on the degree of complexity of the component.