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Title: A compliance-based approach to measure fracture resistance curve for surface cracked steel plates
Authors: Qian, X. 
Li, Y.
Keywords: η-approach
Compliance method
Fracture resistance
Surface crack
Issue Date: Jul-2013
Citation: Qian, X., Li, Y. (2013-07). A compliance-based approach to measure fracture resistance curve for surface cracked steel plates. International Journal of Fracture 182 (1) : 1-19. ScholarBank@NUS Repository.
Abstract: This paper proposes a compliance-based approach to determine the fracture resistance J -Rcurve for surface cracks in high-strength steel (S690) plate specimens in a four-point-bend set up. This study extends the η-approach used in the fracture test for the typical specimens with a through-thickness crack, to the surface cracks in plate specimens in calculating the energy release rate from the area below the measured moment versus the crack-plane rotation. The energy release rate, computed from the detailed finite element models using the domain integral approach, confirms a constant ηvalue for surface cracked steel plates. Coupled with the post-test sectioning, the unloading compliance method quantifies the extended crack-front profiles ahead of the fatigue pre-cracked surface notch, using the crack-size versus the compliance relationship derived from linear-elastic finite element analyses. The fracture resistance curves thus obtained remain similar at different locations along the crack front and comparable with the fracture resistance measured using a standard side-grooved compact tension specimen at a finite crack extension. © 2013 Springer Science+Business Media Dordrecht.
Source Title: International Journal of Fracture
ISSN: 03769429
DOI: 10.1007/s10704-013-9850-3
Appears in Collections:Staff Publications

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