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Ing. Klára Vokáč Machalická, Ph.D.

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The information comes from the university database V3S.

Principal Investigator:
Ing. Klára Vokáč Machalická, Ph.D.
Annotation:
Spoje konstrukcí ze skla je z mnoha důvodů, jako např. křehké porušení a relativně nízká pevnost v tahu skla společně s architektonicko-estetickými požadavky na transparentnost, výhodné provádět jako lepené. Širšímu použití technologie lepení ve stavebnictví však brání nedostatek znalostí a důvěry v dlouhodobé mechanické vlastnosti a chování spoje. Toto je ovlivněno okolním prostředím, zejména vlhkostí, která je velmi významným degradačním faktorem pro většinu polymerů. Kombinovaný vliv dlouhodobého mechanického zatížení a vlhkosti pak často představuje skutečné podmínky, kterým je spoj vystaven po celou dobu své životnosti. Proto je předkládaný projekt zaměřen na stanovení mechanismu degradace a na stanovení dlouhodobých mechanických charakteristik lepených spojů určených pro nosné konstrukce ze skla. Zkušební tělesa budou vystavena jak kombinaci dlouhodobého zatížení a vlhkosti, tak oběma vlivům odděleně pro zjištění změn nezávisle na sobě. Degradační mechanismus bude zkoumán také dalšími chemicko-fyzikálními analýzami a numerickými simulacemi.
Department:
Department of Experimental and Measurement Methods
Year:
2022 - 2024
Program:
Standard projects

Principal Investigator:
prof. Ing. Martina Eliášová, CSc.
Co-Investigators:
Ing. Miroslav Vokáč, Ph.D.; Ing. Klára Vokáč Machalická, Ph.D.
Annotation:
Mechanical properties, safety and reliability of adhesive joints depend on quality of workmanship of joint, cohesive strength, adhesion of glue to the substrate and resistance to ageing (durability). Environmental ageing and material of substrate in glued joint has a great influence on adhesive forces at the interface between adhesive and substrate. For this reason, main goal of the proposed project is assessment of environmental ageing resistance of two different adhesives to various metal substrates often used in civil engineering. An environmental ageing resistance will be determined as a deterioration of mechanical properties together with failure modes of joints after exposure to accelerated laboratory ageing conditions. Changes in aged polymeric adhesive joint, proved by worsening of mechanical behaviour, will be subjected to further chemical and physical analysis to propose the cause of degradation. Experimental analysis will be supported by numerical FE models of adhesive joints, both unexposed and exposed to laboratory ageing.
Department:
Department of Steel and Timber Structures
Year:
2018 - 2020
Program:
Standard projects

Principal Investigator:
Ing. Klára Vokáč Machalická, Ph.D.
Annotation:
Adaptive facades are the future in the field of energy savings in buildings. Behaviour of outside facing elements of the glass facade can continuously affect the flow of energy and light according to the current outside environmental conditions and thus they can significantly reduce energy consumption for heating/cooling and lighting. Facing elements connections with other facade parts are advantageously designed as a glued due to important benefits that adhesive connections provide. But there is a lack of information about semi-rigid or rigid adhesive connections in the facades, which is a very specific application for glued joints due to the requirements on durability, strict geometrical imperfections and connections of unconventional materials often used in the facade design. The main goals of the project are the involvement of all these requirements to experimental analysis of chosen adhesives, selection of suitable methods for testing also with ageing effect and development of numerical models.
Department:
Department of Experimental and Measurement Methods
Year:
2015 - 2017
Program:
COST

Principal Investigator:
prof. Ing. Jiří Studnička, DrSc.
Co-Investigators:
prof. Ing. Martina Eliášová, CSc.; Ing. Tomáš Fremr, Ph.D.; Ing. Michal Netušil, Ph.D.; Ing. Klára Vokáč Machalická, Ph.D.; doc. Ing. Tomáš Vraný, CSc.; Ing. Jiří Žižka, Ph.D.
Annotation:
Project is focused on behaviour of steel and glass structures under different load combinations. Problems of six doctoral Thesis are covered.
Department:
Department of Steel and Timber Structures
Year:
2010 - 2012
Program:
Studentská grantová soutěž ČVUT - SGS10/237/OHK1/3T/11