Title
Compatibility of S-N and crack growth curves in the fatigue reliability assessment of a welded steel joint. 2nd International Conference on Structural Integrity, ICSI 2017, 4-7 September 2017, Funchal, Madeira, Portugal
Author
Hashemi, B.
Maljaars, J.
Leonetti, D.
Snijder, H.H.
Publication year
2017
Abstract
Reliability analysis is a crucial phase in assessing the safety status of new and existing structures. One of its applications is to predict the fatigue life of fatigue prone details. Two models are used to formulate the fatigue limit state: S-N curves in combination with Palmgren-Miner damage accumulation rule and linear elastic fracture mechanics using fatigue crack growth rate curves. Within each model, choices must be made on the values of the variables and these choices are sometimes different in different standards. This study investigates the consistency between the standards by determining the failure probability of the different models and values for a transverse butt weld joint under Variable Amplitude Loading. Partial factors required for the design are then derived as a function of the required reliability for each model and associated values. The influence of the uncertainties related to each involved variable is evaluated by performing a sensitivity analysis.
Subject
TS - Technical Sciences
2015 Fluid & Solid Mechanics
2015 Urbanisation
Buildings and Infrastructures
Fatigue reliability assessment
Probabilistic method
S-N curves
Linear Elastic Fracture Mechanics
Partial Factors
SR - Structural Reliability
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http://resolver.tudelft.nl/uuid:0f43ded3-dd68-4d04-9421-9b138ab516f2
TNO identifier
783114
Source
Procedia Structural Integrity, 5 (5), 959-966
Document type
article