Compatibility of S-N and crack growth curves in the fatigue reliability assessment of a welded steel joint

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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.
Original languageEnglish
Title of host publicationProcedia Structural Integrity
Pages959-966
Number of pages8
Volume5
DOIs
Publication statusPublished - 6 Sep 2017
Event2nd International Conference on Structural Integrity, (ICSI 2017), September 4-7, 2017, Funchal, Madeira, Portugal - Funchal, Portugal
Duration: 4 Sep 20177 Sep 2017

Conference

Conference2nd International Conference on Structural Integrity, (ICSI 2017), September 4-7, 2017, Funchal, Madeira, Portugal
Abbreviated titleICSI 2017
CountryPortugal
CityFunchal
Period4/09/177/09/17

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Crack propagation
Fatigue of materials
Steel
Miners
Reliability analysis
Fatigue crack propagation
Fracture mechanics
Sensitivity analysis
Welds

Cite this

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title = "Compatibility of S-N and crack growth curves in the fatigue reliability assessment of a welded steel joint",
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.",
author = "S.B. Hashemi and J. Maljaars and D. Leonetti and H.H. Snijder",
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language = "English",
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Hashemi, SB, Maljaars, J, Leonetti, D & Snijder, HH 2017, Compatibility of S-N and crack growth curves in the fatigue reliability assessment of a welded steel joint. in Procedia Structural Integrity. vol. 5, pp. 959-966, 2nd International Conference on Structural Integrity, (ICSI 2017), September 4-7, 2017, Funchal, Madeira, Portugal, Funchal, Portugal, 4/09/17. https://doi.org/10.1016/j.prostr.2017.07.134

Compatibility of S-N and crack growth curves in the fatigue reliability assessment of a welded steel joint. / Hashemi, S.B.; Maljaars, J.; Leonetti, D.; Snijder, H.H.

Procedia Structural Integrity. Vol. 5 2017. p. 959-966.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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AB - 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.

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