Fatigue damage evaluation using S-N curves obtained by different data fitting methods

D. Leonetti, S.B. Hashemi, D. Allaix, J. Maljaars

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

Abstract

This paper investigates the differences in the predicted fatigue life of transverse butt weld joints and cover-plated beams considering statistically based fitting methods on fatigue test data and comparing the results with the S-N relation proposed in international standards. The test data fitting are performed by employing the Least Square Method (LSM) and the Maximum Likelihood Method (MLM) taking into account the contribution of the runouts. The Mean curve, the characteristic curve and the design curve have been derived. In order to consider the effect of Variable Amplitude loading, the S-N curves have been extended and the fatigue damage according to the Palmgren-Miner cumulative damage rule is evaluated for a load spectrum that follows a Rayleigh distribution. The results have been compared and discussed together with a Linear Elastic Fracture Mechanics (LEFM) based fatigue prediction.
Original languageEnglish
Title of host publicationEngineering the Future : 39th IABSE Symposium, 19-23 September 2017, Vancouver, British Columbia
Pages2551-2558
Number of pages8
ISBN (Electronic)9783857481536
Publication statusPublished - 2017
Event39th IABSE Symposium, September 19-23, 2017, Vancouver, BC, Canada: Engineering the Future - Vancouver, Canada
Duration: 21 Sep 201723 Sep 2017
http://www.iabse2017.org

Conference

Conference39th IABSE Symposium, September 19-23, 2017, Vancouver, BC, Canada
CountryCanada
CityVancouver
Period21/09/1723/09/17
Internet address

Keywords

  • Bridges
  • Fatigue damage
  • Fracture mechanics
  • Steel
  • Welds

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