Aplicação do método dos elementos discretos (dem) associado com o método dos elementos finitos no ensaio brasileiro de tração

Abstract

The test for determining diametral compression tensile (Brazilian test) is an experiment that can be influenced according to the arrangement and the kind of wood plates. This study analyzes the interaction of the specimen with wooden boards and the influence of the set by applied loading and fracture failure behavior. To study is used to simulate the cylinders tested in Discrete Element Method formed of slashes (DEM), in which method the continuous body is replaced by a representation spatial arrangement formed by bars, forming a trellis, where the resistance is represented by the bars and the mass body is disposed on the nodes. The basic structure of the method cube is formed by a set of twenty bars linked each other and nine nodes, one being at the center of the cube. The simulated model is very difficult to be cylindrical, so for better analysis of the effects associated with the DEM with the Finite Element Method (FEM), using the commercial software Abaqus, which solves problems with loading or the condition very complex contour, as well as experiments with lots of degrees of freedom. The results were compared with experiments performed using only the DEM.