Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/16674
Title: Probabilistic Assessment of Creep-Fatigue Crack Propagation in Austenitic Stainless Steel Cracked Plates
Authors: Vojdani, A
Farrahi, GH
Mehmanparast, A
Wang, B
Keywords: creep-fatigue;crack growth;probabilistic assessment;uncertainty
Issue Date: 2018
Publisher: Elsevier
Citation: Engineering Fracture Mechanics
Abstract: This study investigates the effects of uncertainties in the prediction of creep-fatigue crack propagation in 316L(N) austenitic stainless steel plates containing a semi-elliptical surface defect. Different parameters in geometry, material behavior and test condition are considered as random variables in probabilistic assessments. Monte-Carlo sampling method is employed to estimate the probability distribution of desired outputs, i.e.such as propagated crack sizes, stress intensity factors and creep rupture life. It is shown that, generally, the uncertainty in prediction of crack sizes in both trough-wall direction and along the surface of the plate will be increased by increasing the time (crack size). Furthermore, probabilistic evaluations are performed using different reliability methods to calculate the probabilities of exceedance of available experimental results. These evaluations clarified the importance of consideration of uncertainties in creep-fatigue crack growth prediction. Sensitivity analysis, are carried out to provide useful information about the order of importance of random variables. It is found that, initial crack size may be an important random variable in such probabilistic assessments.
URI: http://bura.brunel.ac.uk/handle/2438/16674
Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Embargoed Research Papers

Files in This Item:
File Description SizeFormat 
Fulltext.pdf577.67 kBAdobe PDFView/Open    Request a copy


Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.