Podrobnosti záznamu

    Study of the effect of moisture content and bending rate on the fracture toughness of rocks
    Souček, Kamil
    Vavro, Leona
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    Acta geodynamica et geomaterialia
    Roč. 10, č. 2
    s. 247-253
    Autoři celkem: 2
    Projekt: ED2.1.00/03.0082, GA MŠk3cav_un_auth*0280791
    Rozsah: 7 s. : E
Předmětová kategorie
    bending rate
    fracture toughness
    tensile strength
Klíčové slovo
Abstrakt (anglicky)
   Generally, rock material failure is c ontrolled by cracks under specific conditi ons. The study of rock fracture toughness belongs to the current frequent directions of research in the area of rock failure. The present paper describes the effects o f parameters influencing the resultant pr operties of rock materials (bending rate , rock moisture) during fracture toughness measurement of different kinds of rocks (sandstone, marble, granite). The highest fracture toughness values were found in the marble samples. This is probably due to the inner structure of analysed marble, which is composed of only one mineral (calcite) and also has a lower porosity th an the used granite. The lowest fracture toughness values were found in the sandstone sample, and reached c. 17-30 % of the measur ed fracture toughness values of the analys ed granite and marble samples. As in the case of the other mechanical properties of rocks (e.g.
   uni axial compressive strength) also in the case of higher sandstone (carboniferous) moisture the fracture toughness values decrease and its deformat ion ability increases.
    AV ČR Brno, Ústav geoniky
Kód přispěvatele
    AV ČR, ÚG
Zdrojový formát
Datum importu
    24. 10. 2014