Eventos Anais de eventos
CONEM 2018
X Congresso Nacional de Engenharia Mecânica
Numerical analysis of the variation of local stresses with the groove thickness
Submission Author:
Carlos Geovane Alves , RN
Co-Authors:
Carlos Geovane Alves, Jorge Alberto Rodriguez Duran, Bruno Gomes Tavares
Presenter: Carlos Geovane Alves
doi://10.26678/ABCM.CONEM2018.CON18-0404
Abstract
In function of the notches or stress concentrators are present in virtually all engineering projects, it is extremely important to know how these influence the stress distribution in the parts in which they are located. Many data K_t stress concentration factor are given in the literature, but they have limitations regarding the thickness, as is the case with the circular plate hole, wherein the ratio of the thickness of the hole can be not more than 1.5 and for plates with double U-notches, which is the model studied in this work, there is no specific value for the radius thickness ratio, although it is said that the values present in the literature are for very thin parts. However, in general three-dimensional case is treated as two-dimensional. This simplification is due to the difficulty that appear in both analytical and experimental analysis. However, neglecting the three-dimensional effects can cause non-conservative mistakes both in static analyzes and in dynamics. Then, motived by these limitations was made a careful study of the distribution of the local stresses, the distribution of the K_t along the thickness by method of three-dimensional finite elements using ANSYS software and finally was made an analysis of the influence of the properties of the materials in the behavior of local stresses in notched geometries. Aiming to analyze the above mentioned three-dimensional effects in the distribution of local stresses, 10 different plates with double U-notches models were used, where it was possible to observe variations of 6-18% in the distribution of local tensions obtained along the notch thickness. Besides that, it was possible to observe a significant influence of the Poisson coefficient on the distribution of the local stress and consequently on the values of K_t. Keywords: Stress Concentration Factor, Notches, Finite Element Method, Ansys, Computational Modeling.
Keywords
Factor Concentration, Slots, Finite Element Method, ANSYS, Computational method
