Non-standard experimental tests of sandstone and its pre-cracking for fracture testing

0489927 - ÚTAM 2019 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Šperl, Martin - Drdácký, Miloš
Non-standard experimental tests of sandstone and its pre-cracking for fracture testing.
IOP Conference Series: Materials Science and Engineering. Vol. 379. Bristol: IOP Publishing, 2018, č. článku 012029. ISSN 1757-8981. E-ISSN 1757-899X.
[International Conference Building Materials, Products and Technologies ICBMPT 2018. /21./. Blansko (CZ), 29.05.2018-31.05.2018]
Grant CEP: GA ČR(CZ) GBP105/12/G059
Institucionální podpora: RVO:68378297
Klíčová slova: fracture mechanics * sandstone * fatigue
Obor OECD: Audio engineering, reliability analysis
http://iopscience.iop.org/article/10.1088/1757-899X/379/1/012029

The paper presents a methodology for investigating fracture phenomena in sandstone. It shows the preparation of test specimens with a cyclic loading generated crack, control of the test specimen preparation and verification by means of x-ray microCT and digital image correlation (DIC) techniques. There are also presented tests studying tensile and fatigue characteristics of arkose sandstone used i. a. for the construction of the medieval Charles Bridge in Prague where weather induced tensile damage and failure occurred. Finally, the new methodology for pre-cracking of the specimens was verified experimentally and fracture toughness was computed.
Trvalý link: http://hdl.handle.net/11104/0286570