Formula for SIF of cracked steel plates strengthened with CFRP plate

Qian-Qian Yu, Xiao Ling Zhao, Tao Chen, Zhigang Xiao, Xiang-Lin Gu

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


Fatigue loading will lead to crack initiation and crack growth in steel structures where stress concentration exists. Fatigue life of aged steel members can be extended significantly with carbon fiber reinforced polymer (CFRP) repair. Stress intensity factor (SIF) is a key parameter to calculate the fatigue life and analyze the progress of crack development. There is a lack of knowledge of SIF for cracked steel plate with different degrees of damage strengthened with CFRP. This paper aims to fill this knowledge gap. The SIF formula is developed based on the classical SIF solution and James-Anderson method by considering two correction factors, representing the effect of load share effect in composite system and the effect of initial damage degree, respectively. It is demonstrated that the SIF formula proposed in the paper is applicable to SIF estimation of strengthened center cracked steel plate with different degrees of damage.

Original languageEnglish
Title of host publicationProceedings of the 22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 22, Sydney, Australia, 11-14 December 2012, From Materials to Structures: Advancement through Innovation
EditorsBijan Samali, Mario M Attard, Chongmin Song
Place of PublicationLeiden The Netherlands
PublisherCRC Press
Number of pages4
ISBN (Print)9780415633185
Publication statusPublished - 2013
EventAustralasian Conference on the Mechanics of Structures and Materials 2012 - University of Technology Sydney, Sydney, Australia
Duration: 11 Dec 201214 Dec 2012
Conference number: 22nd


ConferenceAustralasian Conference on the Mechanics of Structures and Materials 2012
Abbreviated titleACMSM 2012
Other22nd ACMSM: “Materials to Structures: Advancement through Innovation”
Sydney, Australia
December 11-14, 2012

ACMSM22 will be held at the University of Technology Sydney, Australia on 11-14 December, 2012. The first ACMSM conference was held in 1967 at the University of New South Wales and since then another 20 of such biennial conferences have been hosted by various universities across Australia and New Zealand. ACMSM conferences provide the forum for academics, researchers and practitioners to discuss and review latest developments in the broad area of structural mechanics and materials. These conferences place strong emphasis on participation from research students.


  • Carbon fibre reinforced polymer (CFRP)
  • Fatigue damage
  • Steel plate
  • Stress intensity factor

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