Corroded Pipelines: an Approach to Consider Local Effects into Global Analysis

Roberto D. Machado, João Elias Abdalla Filho, Hsu Yang Shang


The objective of this work is to present a simplified approach to solve corroded pipelines using 1-D finite elements. The local effects are evaluated a-priori by 2 or 3D computational models with axi symmetric, shell or brick finite elements. These effects are considered by the stress concentration factors (SCF) which depend on damage types. The stress magnification is introduced in the 1D finite element model artificially. One is possible to show that the equilibrium equation is no more attempted and the interactive process is no more convergent unless a compensative procedure is adopted. This methodology and many applications are presented here to show that the procedure is efficient and has practical applications, especially for long structural systems.

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