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Accumulative damage near crack tip for welded bridge members : fatigue life determination

Li, Z.X. , Chan, Tommy H.T., & Zhou, Taiquan (2005) Accumulative damage near crack tip for welded bridge members : fatigue life determination. Theoretical and Applied Fracture Mechanics, 43(2), pp. 245-260.

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Abstract

The behavior of crack growth for the fatigue damage accumulation near tip where damage is most severe is analyzed. Fatigue life is assessed for the welded members of bridges under traffic loading. Two parts are considered. They consist of the development of a fatigue damage accumulation model for welded bridge members and a method for calculating the stress intensity factor that is needed for evaluating the fatigue life of welded bridge members with cracks. Based on the concept of continuum damage accumulation and fatigue and fatigue crack growth relations, results are obtained to describe the relationship between the cracking count rate and the effective stress intensity factor. Crack growth and fatigue life are found for two types of welded members assisted by using fatigue experimental results. The stress intensity factors are modified by correcting for the geometric shape of the welded members in order to reflect the influence of the weldment and geometry. This is accomplished via the stress intensity factor. The calculated and measured fatigue lives were generally in good agreement for the initial cracking conditions of two types of welded members widely used in steel bridges.

Impact and interest:

1 citations in Scopus
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2 citations in Web of Science®

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ID Code: 12740
Item Type: Journal Article
Additional Information: For more information, please refer to the journal's website (see hypertext link) or contact the author.
Keywords: fatigue damage accumulation, crack growth, fatigue life, welded bridge components, STRESS, INTENSITY FACTOR, HEALTH MONITORING DATA, PART II, GROWTH, PREDICTION, PLATES
DOI: 10.1016/j.tafmec.2005.01.008
ISSN: 0167-8442
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Mechanical Engineering not elsewhere classified (091399)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2005 Elsevier
Deposited On: 29 Feb 2008
Last Modified: 29 Feb 2012 23:53

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