Banca de DEFESA: MARCO ANTONIO FIGUEIROA DA SILVA CABRAL

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARCO ANTONIO FIGUEIROA DA SILVA CABRAL
DATE: 15/02/2023
TIME: 09:00
LOCAL: Programa de Pós-Graduação em Engenharia Civil
TITLE:

A methodology for Assessing the Integrity of Corroded Pipelines Based on a Database

KEY WORDS:

Corroded Pipelines, remote database, API, metamodels, Finite Element Method.

PAGES: 68
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

Pipelines are one of the safest and cheapest means of transporting large amounts of oil and gas, making pipelines important to the industry. Corrosion is among the main causes of leaks in pipelines. This makes the structural integrity analysis of pipelines with corrosion defects of great importance for the industry. Among the forms of integrity evaluation are the semi-empirical methods, which have a low computational cost but have conservative results, and the numerical methods, which provide results close to the experimental ones but have a high computational and skilled labor cost. As an option to these methods, there are metamodels, which offer a low cost of evaluation and results close to those obtained experimentally. One problem in creating metamodels is the scarcity of quality data, such as finite element analysis results and experimental tests. In this context, the objective of this research is the development of a failure pressure prediction technology for corroded pipelines based on the results of numerical simulations stored in a database. A set of models was defined, with an idealized, simple, dimensions, and material curve. Finite element analysis was used to evaluate the models and the analysis results, along with model data, were stored in a database. Such a database can be accessed remotely through an API. These data can be used to estimate the failure pressure of new models that dimensionsare within the range of design variables. The finite element models were validated with experimental results found in the literature. The data present in the system were used to generate metamodels and the failure pressure prediction results were compared with results obtained through finite element analysis and semi-empirical methods. Furthermore, reliability analyzes were carried out, the results were compared against results obtained through standards and a study was realized to determine the influence of design variables in the computation of failure pressure. The results obtained through metamodels are more precise than those derived from semi-empirical methods and less expensive than those using finite elements.

COMMITTEE MEMBERS:
Externo à Instituição - JOSE ANGELO PEIXOTO DA COSTA - IFPE
Externo ao Programa - 2164698 - JOSE MARIA ANDRADE BARBOSA - nullPresidente - 2250444 - RENATO DE SIQUEIRA MOTTA