Load-Separation Method, Spb, Used to Estimate Crack Extension for J-R Curves, Modified for Geometric Variations in Blunt-Notched Remaining Ligament
Source abstract
Abstract
Abstract The Spb method estimates stable crack growth in fracture mechanics precracked specimens test. It compares the load ratio between a precracked specimen that exhibits stable crack growth and a blunt-notched specimen with apparent constant crack length when tested at constant displacement. When it was applied to very tough material, it was found that blunt-notched remaining ligaments varied by as much as 11.83 %, affecting visibly the results. Therefore, to apply the Spb method to very tough material for which non-standard specimens could be used as coiled tubing, the methodology limits are investigated. In this work, particularly the effect of geometry changes through an incipient crack growth produced on the blunt-notched specimens for very tough materials is analyzed. Hence, a modified Spb method is presented that takes into account the change in geometry of the blunt-notched specimens. Results provided in this paper are quite encouraging.
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Research context
OpenAlex topics: Fatigue and fracture mechanics · Non-Destructive Testing Techniques · Numerical methods in engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Dpto. Mecánica, UNPatagonia SJB-CONICET 1 , Ruta Prov.1 km 4, Comodoro Rivadavia, 9000 Chubut, AR
GMF-LPM, UNComa-CONICET 2 , Buenos Aires 1400, Neuquén8300, AR
References (30)
Show source-provided references
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