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Browsing by Subject "fatigue tests"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Simulation of fatigue process
    (Wydawnictwa AGH, 2008) Kuffova, Mariana
    In the paper are shown the results of fatigue crack propagation in the microstructure of material and the dependence da/dN - DKapl by finite - element software ADINA. These results are confronted with the results of fatigue tests. The aim was to elaborate on the crack initiation and growth in the microstructure containing a stress concentrator and redistribution of stress during propagation.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Strength testing of rock and ground anchor rods under static and dynamic loads
    (Wydawnictwa AGH, 2020) Frąc, Witold; Pytlik, Andrzej; Pacześniowski, Krzysztof
    Various types of anchor rods are commonly used for rock mass and soil reinforcement, produced either as full-section steel rods or tubes with threads along their entire length, which are used for the injection of liquid binders. This paper presents the methodology and sample results of strength tests of self-drilling injection anchor rods with R32 rope threads. Such rods are used both in underground mining and in geoengineering under static and dynamic (impact) loads. The results of tests of injection micropiles with trapezoidal thread diameters in the range of T51-T111 mm, used mainly in geoengineering, are provided as well. This paper also presents the basic requirements for the fatigue loading of nails and injection micropiles used in geoengineering, based on standards and the European Assessment Document (EAD), applicable in the European Union.