The thesis deals with computational modelling of ceramic foams and analysis of influence of structural manufacturing defects (like broken struts, closed pores and material clumps) have on foam strength. Model of foam geometry was discretized using beam elements in order to decrease computational cost. In place where several struct join, rigid beam element was used so that the increased stiffness is better modelled. Closed walls of pores were modelled and discretised by shell elements. Influence of loading direction was analysed on foams containing no defects and then influence of amount of defects in foam on strength was further analysed. Highest strength show foams created by cells whose structs are oriented in direction of loading. These were losing strength most rapidly. Foam with structure of rhombic dodecahedral cell was least influenced by presence of closed pore defects but it also showed lowest strength even without defects. Cells with struts oriented in direction of loading experienced biggest drop in strength. Kelvin cell is a compromise. It was shown that difference in strength of strut with constant and varying cross-section is tenths of percent.

The master’s thesis deals with a numerical simulation of failure of ceramic foams with open-cell structure and with understanding of conditions required for the failure of the structure under various mechanical loading conditions. To this purpose, the so-called stress-energy coupled criterion was utilized. The motivation for this thesis was to create a model able of the most accurate prediction of the ceramic foam strength in comparison with experimental observations. First part of the thesis is focused on the theoretical background required for solving the problem. More specifically there are mentioned methods of the foam material modelling, Linear Elastic Fracture Mechanic (LEFM) and coupled stress-energy criterion used for definition of the crack initiation. In the second part of the thesis, numerical Finite Element Analyses (FEA) whose main purpose was to determine critical conditions necessary for the initiation of strut failure within the foam structure, were performed. These pieces of knowledge were then used for creation of the numerical simulation algorithm of the mechanical test of foam material with regular cell pattern. Outputs of numerical simulations were at the end of this work compared with experimental results (of the compression test) made on the real Al_2 O_3 foams prepared by 3D printing technology and provided by the Institute of Physics of Materials Czech Academy of Science. It can be concluded that a good agreement between results of both approaches was reached and the prediction of the ceramic foam mechanical strength using the developed model is in the meanwhile the most accurate estimation from recently published approaches.

This thesis is concerned to the study of behaviour of fibre composites with ceramics matrix. The composite consists of pyrolysed polysiloxane matrix reinforced by ceramic fibre Nextel 720. Main aim of this work is optimisation of fibre matrix interface through the selection of suitable precursor of the matrix with respect to temperature stability, sufficient strength and reasonable fracture toughness. Samples of matrices were exposed to the long term heat treatment in the range 1100 – 1500 °C. The mechanical properties as hardness and indentation elastic modulus were determined after heat treatment. Selected precursors of matrices were used for composite fabrication. Elastic modulus and fracture toughness at room and elevated temperatures were studied. Discussion is dedicated to the description of changes in mechanical properties with respect to chemical processes taking place during high temperature exposition. Further, reasons of fracture behaviour of composite materials are discussed, and finally, gained knowledge and outlined possibilities of subsequent development are summarised.

The object of this work is the preparation of project documentation for construction of a block of flats building containing all requirements in accordance with applicable regulations and standards. The building is located on sloping terrain on land 553/14, 553/15, 553/16 and 553/17 in the cadastral area Nemošice. The building has three overground floors containing a total of eleven residential units and one underground floor, which is partially below ground, where the six individual garages and cellars. Perimeter walls floors are made of ceramic bricks, underground floors of concrete bricks. Masonry is fitted with contact system. Ceilings are made of prestressed concrete ceiling panels, flat roof single casing.

The aim of this work is to analyse axisymetric tasks by norm ISO 7206-5, which is used to determination of static strength of ceramic heads. In the numeric analysis there will be considered form variances from nominal conicalness and circularity of stem sections i.e. possible variances caused by production. Furthermore form changes of recess inside of the head measured on real samples will be considered. All these variances from nominal values are necessary to analyse in more details, because they can participate in destruction of ceramic heads. The stem system, ceramic head and load cone (DHK) will be simulated as a 2D axisymetric task and 3D quarter symetrical task. That is why is necessary to undertake also comparing analysis of 2D and 3D tasks and compare results or eventually evaluate the error. This problem is solved using of Finite element System ANSYS 11.0.

The thesis continue thematically in the previous development of the wax mixtures for the company Fimes. The general description of the investment casting process from the production of the die to casting of the wax pattern is handled in the first part. It is followed by the summary of the previously carried out experiments on cracking the shells. The experimental part describes the individual operations from the production of tested wax patterns to casting in the Boilercláv. The newly developed wax mixture is compared to the wax mixture used by the company Fimes. The experiments focus on the possibility of cracking the shells during the casting process and the dimensional stability of wax mixtures.

This diploma thesis will discuss possibilities of using inorganic fibers to improve the mechanical properties of the resulting physical body bricks. Assessment of the effect of fiber length, fiber thickness is in the order of micrometers. In this work we were used fibers which are commercially produced for the purpose of reinforcement, but also waste fibers, which mainly serves as an insulator.

Ceramic Sculpture in Prague Interwar Architecture This thesis project from the field of art history is dedicated to the use of ceramic sculpture in the architecture of the first Czechoslovak Republic. It puts an emphasis on so called "national style", which is defined theoretically in the first place and then explained in the context of the artistic development in Czechoslovakia and, more generally, the international art deco current. Separate chapters describe the role of Czech art schools and the significant personality and work of Helena Johnová. The scope of the research is limited to the monuments located in Prague, but it also takes into account important commissions situated outside the city, as well. A catalogue of ceramic sculpture associated with the Prague architecture of the concerned period forms part of the study. Keywords National Style, Ceramic Sculpture, Czechoslovakia, First Czechoslovak Republic, Helena Johnová, Academy of Arts, Architecture and Design in Prague Počet znaků (včetně mezer): 128 268

The thesis deals with the topic of the differences in human corporeality as uniqueness of our existence. It is divided into four parts. The theoretical part defines the concept of corporeality and the associated topics of self- concept, self-acceptance and self-presentation, with an emphasis on supporting the development of people with combined disabilities. Furthermore, the theoretical part deals with the use of human body in art, especially modern art - action art, based on ritual, and body-art. The didactic part brings a proposal to adapt the curriculum of the school program of Ceramic Production for pupils with combined disabilities, by assigning suitable artistic tasks using the material of ceramic clay. The presented result is a series of art lessons - methodological sheets for four teaching blocks focused on the use of physical gestures, emotions and self-concept by students with combined disabilities. The aim is to involve pupils with all types of disabilities, and cause their conscious use of physicality in working with ceramic clay. The research uses the method of qualitative research, namely a questionnaire survey and participatory observation. Research has confirmed that the art lessons series is suitable for pupils with all types of disabilities, and namely that adapting tasks to...

Folk religiosity during High Middle Ages and Early Modern times as reflected in material culture (the example of small ceramic sculpture) This work focuses on study of religious practice and urban everyday life of urban folk groups in Prague Towns from High Middle Ages till Early Modern times. The most common archaeological artifacts reflecting religious practice are small clay figurines found both in urban and in rural environment. These figurines made of fired clay depict in most cases Madonna with Christ-child and various saints, nevertheless profane figurines and various zoomorphic artifacts can be found too. This work is focused mainly on findings of clay figurines obtained during the large archeological excavation on Republic Square in Prague, which offered a unique collection of artifacts dated from 1250 to 1600. Analogies from the Central Europe will be considered in the process of evaluation of the assemblage mentioned above. It is not known exactly what the purpose of these artifacts was and it is still a subject of discussion, into which we will try to bring some new light. Right iconographic interpretation requires a comparation with some other objects of folk religiosity and urban everyday life (such as medallions and other small holy objects, pilgrim signs, pilgrimage pictures,...