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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
- Source :
- Acta Materialia, Acta Materialia, Elsevier, 2018, 146, pp.1-11. ⟨10.1016/j.actamat.2017.11.056⟩, Acta Materialia, 2018, 146, pp.1-11. ⟨10.1016/j.actamat.2017.11.056⟩
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
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.
- 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)
Subjects
Details
- ISSN :
- 13596454
- Volume :
- 146
- Database :
- OpenAIRE
- Journal :
- Acta Materialia
- Accession number :
- edsair.doi.dedup.....3a1ccdb455ddde8df01f008342e00488