Simulación numérica del coeficiente de concentración de tensiones en grietas de uniones soldadas a tope

fatigue is one of the more complex phenomenons in the failure of parts under dynamic loads. in this work is pursued as main objective to expose a methodology based on the finite elements method for the evaluation of the stress concentration coefficient in longitudinal and traverse cracks of butt welded joints. the material bases selected to carry out the study it is the steel aisi 1015 and the electrode e6013 cuban manufacturing. it is carried out a characterization of the mentioned defects and later the dimensions of each defect are varied to obtain relationships between them and the stress concentration coefficient. the simulations were carried out with the software cosmoswork 2008. with the proposed methodology were obtained graphs and equations that describe the behavior of the stress concentration coefficient in different nodes of the crack. the stress concentration coefficient value it is in correspondence with the defects sizes.