Title
Fatigue damage evaluation using S-N curves obtained by different data fitting methods
Author
Leonetti, D.
Hashemi, B.
Allaix, D.L.
Maljaars, J.
Publication year
2017
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
Subject
2015 Fluid & Solid Mechanics
SR - Structural Reliability
TS - Technical Sciences
Buildings and Infrastructures
Architecture and Building
2015 Urbanisation
Steel
Bridges
Fatigue damage
Welds
Fracture mechanics
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http://resolver.tudelft.nl/uuid:9d9403f6-8f1b-42c7-8938-463e00c9e0ab
TNO identifier
783116
Source
39th IABSE Symposium - Engineering the future, September 21-23,2017, Vancouver, Canada, 2551-2558
Document type
conference paper