Název: Numerical prediction of parasitic energy dissipation in wedge splitting tests on concrete specimens
Autoři: Veselý, V. ; Holušová, Táňa ; Seitl, Stanislav
Typ dokumentu: Příspěvky z konference
Konference/Akce: Engineering Mechanics 2012 /18./, Svratka (CZ), 2012-05-14 / 2012-05-17
Rok: 2012
Jazyk: eng
Abstrakt: Undesirable energy dissipation taking place during wedge-splitting tests on cementitious composites and resulting in overestimation of the values of the determined fracture-mechanical characteristics of the tested materials is investigated in this paper via numerical simulations performed using a commercial finite element method tool with an implemented cohesive crack model. The rather broad range of cohesive behaviour of the studied materials was simulated through adjustments made to the corresponding characteristic length of the composite. The parasitic amount of energy is dissipated in fracture processes around the corners of the groove for the insertion of the loading platens, as these corners introduce rather strong stress concentrators to the specimen. This amount was extracted from simulated load-displacement curves and it was discovered that the amount considerably depends on the specimen proportions but its dependence on the level of material brittleness is not so significant.
Klíčová slova: concrete fracture; energy dissipation; numerical simulation; specimen proportions; wedge-splitting test
Číslo projektu: GAP105/11/1551 (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Proceedings of Engineering Mechanics 2012, ISBN 978-80-86246-40-6

Instituce: Ústav fyziky materiálů AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0216487

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-136007


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav fyziky materiálů
Konferenční materiály > Příspěvky z konference