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Browsing by Subject "damage process"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Zmiany energetyczne związane z rozwojem uszkodzenia i dyssypacją plastyczną w teście jednoosiowego i trójosiowego ściskania próbek piaskowca
    (Wydawnictwa AGH, 2011) Cieślik, Jerzy
    Results of laboratory investigations focusing on energy changes with damage and plastic dissipation process under a uniaxial and triaxial compression tests of sandstone samples has been presented in this paper. It was assumed, that fracture propagation and plastic dissipation caused by compression of rock samples follows by coupled damage and plasticity mechanical model. Based on this model and the principle of conservation of energy, damage and the plastic dissipation energies was determined separately.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Zmiany osiowej sztywności i rozwój uszkodzenia próbek piaskowca w teście konwencjonalnego trójosiowego ściskania
    (Wydawnictwa AGH, 2011) Cieślik, Jerzy; Jakubowski, Jacek; Tajduś, Antoni
    Results of laboratory investigations focusing on change of axial stiffness of sandstone samples made under a conventional triaxial compression test conditions has been presented in this paper. It was assumed, that fracture propagation and damage process of rock samples on representative volume element level follows continuum damage mechanics laws. Based on investigations and analysis of axial stiffness change of sandstone samples for applied confining pressures, a damage variable was determined and the condition for the initiation of damage process was proposed. The results of investigations show a phenomenon of two different failure processes.