ESTUDIO DEL COMPORTAMIENTO MECÁNICO DE DUCTOS SOMETIDOS A DIFERENTES CONDICIONES DE CARGA MEDIANTE MODELADO NUMÉRICO

Abstract

The dynamic activity and growth of the National Oil industry demand to create a greater infrastructure to satisfy its needs of operation, production, storage and distribution of the oil, as well as its derivatives. Hence, with respect to the storage and distribution of these products, in recent years it is had been requiring the construction of new pipelines, also the repair or rehabilitation of other already existing ones; reason for which this research is going to the study of the mechanical behavior of the steel pipes submitted to different load cases. Therefore, in this work of thesis the steel pipes with different thicknesses are analyzed, taking into account the linear elastic behavior and nonlinear mechanical models of the steel material, with the purpose to study the structural behavior under combined actions such as, internal pressure, external pressure, axial effort and bending. Theoretical models of the shells and numerical models based in the finite element method (FEM) were used for the elastic analysis and collapse of these pipes. The numerical models are generated with of program Ansys. The numerical models include real geometries of typical pipes used in the oil industry and the laws of behavior of the material. Finally, the numerical approaches of the models are compared with the theoretical results and experimental dates show a good agree between them.