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

International Conference Building Materials, Products and Technologies

土木建筑工程

Šperl, M.^1 ; Drdácký, M.^1

Institute of Theoretical and Applied Mechanics, Czech Academy of Sciences, rosecká 809/76, Prague 9

190 00, Czech Republic^1

关键词: D. digital image correlation (DIC);    Experimental test;    Fatigue characteristics;    Micro CT;    Pre-cracking;    Tensile damage;    Test specimens;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/379/1/012029/pdf
DOI  :  10.1088/1757-899X/379/1/012029

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

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.