Open AccessA time-variant reliability approach applied to corroded naval structures with non-linear behaviour
Author(s) -
Mikaël Cazuguel,
JeanYves Cognard
Publication year - 2008
Publication title -
european journal of computational mechanics
Language(s) - English
Resource type - Journals
eISSN - 2642-2085
pISSN - 2642-2050
DOI - 10.13052/remn.17.893-905
Subject(s) - reliability (semiconductor) , finite element method , convergence (economics) , stability (learning theory) , structural engineering , computer science , structural reliability , engineering , reliability engineering , mathematical optimization , mathematics , probabilistic logic , power (physics) , physics , quantum mechanics , machine learning , artificial intelligence , economics , economic growth
As corrosion effects can lead to catastrophic consequences in naval structures, methods to take it into account are a source of concern. Its variability in time and space, in addition to the consideration of random and temporal character of material behaviours, environmental conditions and loads, requires adapted strategies from mechanical and reliability points of view. In this paper, we propose a 2D non-linear finite element mechanical approach modelling local decreases of the safe thickness of the structure, avoiding successive re-meshing. A time-variant reliability analysis of a corroded plate submitted to a stochastic load is carried out to validate the propounded strategy. The reliability analyses are posttreated in a time-variant way by the PHI2 method, whose two existing formulations are compared in terms of stability and convergence speed.