Análise da sensibilidade ao entalhe do poliuretano necuron de diferentes densidades utilizando peridinâmica

Abstract

Understanding how materials behave and their properties is fundamental to adapting their use to the most diverse situations, that is, making the most of their characteristics so that there is no waste. Considering that Necuron polymers are very usable within the industrial sector, especially in dies and molds using different angles, it is necessary to better understand how this material behaves in the presence of concentrators, or even, its sensitivity to notch. For this, peridynamics is used in this work to analyze the notch sensitivity of Necuron densities 100, 300 and 708 kg/m3. The behavior of the material is validated using V-notched plates with data available from the literature. After that, plates with different hole diameters are simulated and the sensitivity analysis is performed. In the validation, the numerical results obtained a maximum relative difference of 5.38% when compared with the experimental data. The results of the notch sensitivity show that the material can be classified as almost brittle, as it distances itself from the insensitivity curve.