Produção Nacional
Revisado por pares
Fatigue life assessment of damaged pipelines under cyclic internal pressure: Pipelines with longitudinal and transverse plain dents
2014; Elsevier BV; Volume: 68; Linguagem: Inglês
10.1016/j.ijfatigue.2014.06.003
ISSN1879-3452
AutoresBianca Pinheiro, Ilson Pasqualino, Sérgio B. Cunha,
Tópico(s)Hydrogen embrittlement and corrosion behaviors in metals
ResumoThis ongoing work aims to refine a methodology for fatigue life assessment of dented steel pipelines under cyclic internal pressure. A numerical model is developed to obtain stress concentration factors on dented pipes under internal pressure. A comprehensive parametric study is accomplished and analytical expressions to estimate stress concentration factors for spherical, longitudinal and transverse plain dents as a function of selected geometric parameters are developed. The proposed fatigue assessment methodology is validated from fatigue test results. Here, the analytical expressions are refined to include a more complete dent geometry definition for transverse, longitudinal and short longitudinal dents.
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