Análise do efeito de escala na resistência à tração de materiais quase frágeis utilizando a peridinâmica

Abstract

The problem of the Size effect on the material's properties like becomes a particularly important point when a transition is made between the size of the structure tested in the laboratory and its actual size. Thus, the question of the validity of laboratory tests and the prediction of their behavior in engineering structures continue to be a topic in constant research. It is known that as the size of the tested sample increases, there is a change in the global behavior from ductile to brittle. Capturing this change is the key to knowing the real behavior of the sample and offering better predictions for the design of this type of structure. In this work, the application of the Peridynamic (PD) theory is evaluated to predict the behavior of quasi brittle material specimens of different sizes submitted the uniaxial traction load and four-point bending loading using a bilinear damage law. The results show that the PD, in both applications, is able to predict the scale effect, with values consistent with those observed in the literature. Keywords: Size Effect, Peridynamics, Quasi Brittle Materials.