Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Probabilistic studies of the collapse pressure of ovalized pipelines with corrosion defects obtained via semiempirical methods against FEM.
Submission Author:
Vinícius Moura , PE
Co-Authors:
Vinícius Moura, RENATO MOTTA
Presenter: Vinícius Moura
doi://10.26678/ABCM.COBEM2021.COB2021-1868
Abstract
The Finite Element Method (FEM) as been used in the literature as one of the most accurate approaches to quantify the remaining strength of corroded pipes. The direct simulation, of the physical phenomena involved in the pipe failure, has helped to create, and validate several semiempirical equations used in the industry for the assessment of corroded pipelines. In this paper, results of collapse pressure of a great number of random generated corroded pipelines, subjected to external pressure, will be obtained using nonlinear FE analyses. The variables involved in each case are related to the pipe material properties, geometry of the pipe (including ovalization) and defect dimension. This system integrates several tools to automatically generate FE models, perform nonlinear analysis and to get the final (collapse) pressure. Two methods to generate the ovalized FE model will be tested. The results from four semiempirical equations for the collapse pressure of corroded pipeline (Netto, DNV, Bai and Hauch, Klever and Tamano) will be compared with results from the FE analyses. A probabilistic model of the error for each semiempirical method will be suggested for reliability and risk-based analysis applications.
Keywords
corroded pipelines, Ovalized Pipelines, Collapse Pressure Assessment, Automatic Finite Element Modelling, SemiEmpirical Methods
