1. Identification of the Stress Intensity Factor of Carbon Cathode by Digital Image Correlation
- Author
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M. A. Baril, Julien Réthoré, Mario Fafard, Luca Sorelli, Donald Picard, and Houshang Alamdari
- Subjects
Digital image correlation ,Materials science ,business.industry ,Mode (statistics) ,Fracture mechanics ,02 engineering and technology ,01 natural sciences ,Cathode ,law.invention ,010101 applied mathematics ,020303 mechanical engineering & transports ,Optics ,0203 mechanical engineering ,Shear (geology) ,Flexural strength ,law ,Displacement field ,0101 mathematics ,Composite material ,business ,Stress intensity factor - Abstract
Crack propagation in carbon cathode used in the aluminium industry has been investigated through flexural tests on notched specimens. The main parameters of interest were the geometrical evolution of the crack and the stress intensity factor at the tip ends. The latter, in the case of interfacial fracture in two-dimensional geometries, can be related to normal (mode I) and shear (mode II) stresses. In this work, a new methodology has been applied which optically measures the crack tip displacement field by Digital Image Correlation. The stress intensity factors derived from the experimental data are consistent with results available in the literature. Furthermore, the preliminary results showed that characterizing the mode I (opening) only is somehow challenging due to the heterogeneity of such carbonaceous materials.
- Published
- 2017
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