Simulação de modelos computacionais aplicada à integridade de estruturas metálicas sob efeito de corrosão-fadiga.

Abstract

This report aims to expor knowledge upon all aspects of the continuous damage mechanics’ Structural Integrity, the fracture mechanics, and the phenomenological study of interest problems on pipeline integrity with environmental effects. This knowledge is of great important for this research, since its aims are crucial for the development of computational tools, and allows the integration of models for structural analysis by Finite Element Method and Parametric identification through inverse analysis for the solution of problems that occur in metal structures subject to corrosion-fatigue processes. Was modeled and the top growth of a crack subjected to the combination of mechanical and corrosive effects. This simulation was based on summaries of the Mechanics of Fracture and Damage Mechanics of Continuous. With this model we were able to determine the variations depending on the time of the concentration of agents at the tip of the crack, the crack length, the radius of curvature of the crack and the accumulation of damage at the tip of the crack.