Browsing by Author "Malíková, Lucie"
Now showing items 1-20 of 22
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Assessment of crack stability in a quasi-brittle particle composite
Malíková, Lucie; Klusák, Jan; Keršner, Zbyněk (Elsevier, 2017-01-01)Fracture behaviour of a crack in a particle (silicate based) composite is studied. The crack propagation depends not only on mutual elastic mismatch of matrix and aggregate but also the influence of the interfacial transition ... -
Crack propagation in a brittle DCB specimen assessed by means of the Williams’ power expansion
Malíková, Lucie; Ravazi, Seyed Mohammad Javad; Berto, Filippo (Gruppo Italiano Frattura, 2019-04-01)A double cantilever beam geometry has been chosen in order to investigate the importance of the higher-order terms of the Williams’ power expansion for the crack path estimation. The crack propagation has been tested ... -
Crack propagation in the vicinity of the interface in layered materials
Malíková, Lucie; Náhlík, Luboš; Hutař, Pavel; Knésl, Zdeněk (University of West Bohemia, 2009-01-04)Paper deals with the problem of crack propagation in the vicinity of the interface in layered materials. Layered materials are often used in practice, primarily because of their better mechanical properties in comparison ... -
Estimation of the crack propagation direction in a mixed-mode geometry via multi-parameter fracture criteria
Malíková, Lucie; Veselý, Václav; Seitl, Stanislav (Gruppo Italiano Frattura, 2015-08-15)The presented work introduces a numerical parametric study on the crack propagation direction under mixed-mode conditions (mode I + II). It is conducted for the geometry of an eccentric asymmetric four-point bending of a ... -
Evaluation of fracture response of Silesian granite specimens via Effective Crack Model Approach and finite element analysis
Malíková, Lucie; Vavro, Leona; Vavro, Martin; Keršner, Zbyněk (Elsevier, 2020-02-19)The paper is focused on the advanced evaluation of fracture tests of selected rock specimens. Assessment of fracture response of chevron notch cylindrical specimens of Silesian granite subjected to three-point bending test ... -
Fracture mechanics parameters of multilayer pipes
Malíková, Lucie; Náhlík, Luboš; Hutař, Pavel; Knésl, Zdeněk (University of West Bohemia, 2007-10-19)Multilayer pipes consisting of different materials are frequently used in praxis because of partial improvement of the properties of pipe systems. To estimate lifetime of these pipes the basic fracture parameters have to ... -
Impact of specific fracture energy investigated in front of the crack tip of three-point bending specimen
Klon, Jiří; Sobek, Jakub; Malíková, Lucie; Seitl, Stanislav (Gruppo Italiano Frattura, 2017-07-01)Presented study is focused on the analysis of the dependence of the specific fracture energy value on the assumed work of fracture in three-point bending tests. Specimens of different sizes and relative notch lengths are ... -
Lomové testy vybraných těles se speciálním plnivem: experimenty a numerická simulace
Majda, TomášDiplomová práce se zabývá vybranými lomovými testy a vyhodnocením lomových parametrů těles z~cementových kompozitů. Jedna část práce se zabývá cementovým kompozitem se skleněným sférickým plnivem jednotné frakce 2 mm. Po ... -
Mechanical Fracture and Fatigue Characteristics of Fine-Grained Composite Based on Sodium Hydroxide-Activated Slag Cured under High Relative Humidity
Šimonová, Hana; Kucharczyková, Barbara; Bílek, Vlastimil; Malíková, Lucie; Miarka, Petr; Lipowczan, Martin (MDPI, 2021-01-08)A typical example of an alternative binder to commonly used Portland cement is alkali-activated binders that have high potential as a part of a toolkit for sustainable construction materials. One group of these materials ... -
Mixed-mode crack propagation in a semi-circular disc under bending made of an environmental-friendly concrete
Malíková, Lucie; Miarka, Petr; Šimonová, Hana (Elsevier, 2020-12-01)The paper is devoted to investigations on the crack deflection angle under mixed-mode loading conditions. Several semi-circular disc configurations with an inclined crack under three-point bending are suggested and its ... -
Modelling of interfacial transition zone effect on resistance to crack propagation in fine-grained cement-based composites
Šimonová, Hana; Vyhlídal, Michal; Kucharczyková, Barbara; Bayer, Patrik; Keršner, Zbyněk; Malíková, Lucie; Klusák, Jan (Italian Group of Fracture, 2017-07-03)In this paper, the attention is paid to investigation of the importance of the interfacial transition zone (ITZ) in selected fine-grained cement-based composites for the global fracture behaviour. This is a region of cement ... -
Multi-parameter crack tip stress state description for estimation of fracture process zone extent in silicate composite WST specimens
Veselý, Václav; Sobek, Jakub; Malíková, Lucie; Frantík, Petr; Seitl, Stanislav (Gruppo Italiano Frattura, 2013-04-15)For wedge splitting test specimens, the stress and displacement fields both in the vicinity and also in large distance from the crack tip are investigated by means of numerical methods. Several variants of boundary conditions ... -
Multi-parameter fracture mechanics: crack path in a mixed-mode specimen
Malíková, Lucie; Šimonová, Hana; Kucharczyková, Barbara; Miarka, Petr (Gruppo Italiano Frattura, 2019-07-02)A mixed-mode geometry has been chosen to investigate a crack propagation using the multi-parameter fracture mechanics concept. The socalled Williams’ series expansion is used for the crack-tip stress field approximation. ... -
Numerická podpora pro štípací test na trámovém tělese
Juhászová, TerezaBakalářská práce je zaměřena na numerickou podporu netradičního štípacího testu. Numerická analýza je provedena v programu ANSYS pro tělesa s různými vstupními parametry a vyhodnocení jejich chování při štípacím testu. ... -
Over-deterministic method: The influence of rounding numbers on the accuracy of the values of Williams' expansion terms
Růžička, Vladimír; Malíková, Lucie; Seitl, Stanislav (Gruppo Italiano Frattura, 2017-11-01)A study on the accuracy of the values of Williams’ expansion terms influenced by rounding numbers is presented. The results are presented taking into account a three-point bend single edge notched beam. Crack tip stress ... -
Popis šíření trhlin v polích silně nehomogenních a reziduálních napětí
Štegnerová, KateřinaTato dizertační práce vznikla pod vedením mého školitele doc. Ing. Luboše Náhlíka, Ph.D. a školitele specialisty doc. Ing. Pavla Hutaře, Ph.D. a je zaměřena zejména na aplikaci zobecněného konceptu lineárně elastické lomové ... -
Porušování vybraných stavebních kompozitů v blízkosti rozhraní plniva a matrice
Vyhlídal, MichalRozhraní mezi zrnem kameniva a matricí představuje v cementových kompozitech nejslabší článek. Aktuálnost tématu je o to větší zejména u vysokohodnotných a vysokopevnostních betonů, kde je potřeba eliminace, příp. redukce, ... -
Propagation conditions of an eccentric crack in a semi-circular disk loaded in I+II mixed mode
Malíková, Lucie; Miarka, Petr; Šimonová, Hana (EDP Sciences, 2020-03-05)Multi-parameter fracture mechanics concept is applied to investigate crack propagation conditions during a three-point bending (3PB) test performed on an asymmetrical semi-circular disk under I+II mixedmode loading. The ... -
Vliv reziduálních napětí na odhad životnosti polymerních trubek
Poduška, JanPožadovaná životnost plastových trubek používaných v tlakových rozvodech vody a dalších aplikacích je minimálně 50 let. Takto dlouhou životnost je poměrně náročné prokázat klasickými metodami zkoušení trubek, jako je např. ...