1. Fracture toughness, fracture energy and slow crack growth of glass as investigated by the Single-Edge Precracked Beam (SEPB) and Chevron-Notched Beam (CNB) methods
- Author
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Hervé Orain, Theany To, Arnaud Bazin, Mickaël Le Fur, Fabrice Célarié, Tanguy Rouxel, Yann Gueguen, Clément Roux-Langlois, Vincent Burgaud, Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), NIST, National Institute of Standards and Technology, ERC, European Research Council, US, Universiteit Stellenbosch, 320506, ERC, European Research Council, and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Materials science ,Polymers and Plastics ,Single-Edge Precracked Beam (SEPB) ,02 engineering and technology ,Edge (geometry) ,01 natural sciences ,Chevron-Notched Beam (CNB) ,Fracture toughness ,Indentation ,0103 physical sciences ,Chevron (geology) ,Composite material ,[PHYS]Physics [physics] ,010302 applied physics ,Vickers Indentation Fracture (VIF) ,Stress-corrosion ,Metals and Alloys ,Fracture mechanics ,021001 nanoscience & nanotechnology ,Electronic, Optical and Magnetic Materials ,Cracking ,Ceramics and Composites ,Fracture (geology) ,0210 nano-technology ,Beam (structure) - Abstract
International audience; We show that the Single-Edge Precracked Beam (SEPB) test is not only suitable to the determination of the fracture toughness (KIc) of glass, but also offers a unique opportunity to assess the slow crack growth behavior in a single experiment lasting for few minutes. Besides, we found that it is possible to get either a stable or an unstable final fracture regime (pre-cracked specimen) depending on the testing parameters, and that the unstable case is preferable for the estimation of KIc. The “pop-in” precrack was found mostly to close completely once the load was suppressed on the bridge-flexure device. This led to a reopening event on the loading curves. It is noteworthy that all these original observations were made possible thanks to the design of a very stiff testing apparatus (6.7 MN m−1) allowing for a cross-head speed as small as 0.01 μm s−1. Results obtained on four grades of commercially available glasses are compared to those stemming from Vickers indentation cracking and chevron notched experiments. © 2017 Acta Materialia Inc.
- Published
- 2018