Prediction of reliability of the corroded pipeline considering the randomness of corrosion damage and its stochastic growth. (August 2016)

• Record Type: Journal Article
• Authors: Larin, Oleksiy; Barkanov, Evgeny; Vodka, Oleksii
• Is Part Of: Engineering failure analysis. Volume 66(2016:Aug.)
• Page Start: 60
• Page End: 71
• Publication Date: 2016-08
• Subjects: Corroded pipe-line -- Monte-Carlo simulations -- Reliability -- Corrosion defect with random shape; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2016.03.022
• Languages: English
• ISSNs: 1350-6307

Abstract

Abstract: The paper deals with exploration of the probabilistic characteristics of the deformed state and stress concentration of a pipeline section with corrosion damage considering its random spatial shape. The investigation was done based on 3D FE models. A special algorithm is developed for the direct solid modeling of the corroded area in the upper surface of the pipe. A series of 3D models of a pipe with a volumetric surface defect, which has a random shape, is created based on the developed algorithm. An analysis of a probable stress concentration values for different statistical parameters of corrosion defect was carried out in the frame work of Monte-Carlo simulations. The statistical analysis of the system response allowed us to obtain the conditional probability density functions of the maximum stress concentration variation. It was done taking into account the level of the maximum corrosion depth. This information together with statistical data on the corrosion rate obtained from the references gave us a possibility to propose a method to estimate a reliability of a corroded pipe in operation. Highlights: Corrosion defect with random spatial shape Probabilistic estimation of the reliability of corroded pipe in operation Monte-Carlo simulations of the deformation of the pipelines with corroded damage based on FE models