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Fracture Toughness of Metallic Materials and its Testing
Kosek, Lukáš ; Zapletal, Josef (referee) ; Němec, Karel (advisor)
The purpose of the work is to introduce the basic of the fracture toughness of metallic materials and its measuring under the conditions of the plane strain. There are shown essential concepts of the linear elastic fracture mechanics, which is used for the description of the material behavior at fracture of the material with a crack. It defines stress intensity factor and describes the main elements influencing the fracture toughness. Furthermore, the work contains the particular testing methods, specimens and testing equipments. In the conclusion it recapitulates the availability and the application of the linear elastic fracture mechanics.
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Evaluation of upsetting test
Vávra, Roman ; Císařová, Michaela (referee) ; Řiháček, Jan (advisor)
This work is focused on theoretical and practical processing upsetting test. There is an explanation of their significance in engineering. Also, there are described various kinds of tests and their evaluation. Furthermore, the work deals with the experiment for a specified material MS 68. This material was compacted using two test machines equipped with measuring software. First machine is a hydraulic press CZR 600 with software DEWESoft and the second is a universal testing machine ZD 40 using software M-Test. An evaluation based on the collected data is included in the form of deformation resistance curves of tested material.
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Comparison of assessment of the state of bridges in Germany and the Czech Republic
Víša, Ondřej ; Stehlík, Michal (referee) ; Cikrle, Petr (advisor)
With the increasing age, amount and demands on the quality of bridges, the role of assessing their condition is increasingly important both in the Czech Republic and in Germany. This bachelor thesis compares the general state of bridges in both countries in its theoretical part; furthermore it compares the standards, terminology, the way of keeping record and evaluation. The practical part is reserved for survey and assessment of a bridge in Germany and for comparison purposes also in the Czech Republic. In its end the thesis summarizes the most fundamental differences between Czech and German methods.
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Survey and Assessment of highway D2 Bridge
Výpustek, Libor ; Suza, Igor (referee) ; Cikrle, Petr (advisor)
This thesis deals with the exploration and evaluation of the existing bridge carried him on the highway D2. The work is divided into theoretical and practical parts. The theoretical part focuses on the technical surveys, diagnosis of building structures and some methods of investigation and testing of building structures. In the practical part the visual inspection and diagnosis of disorders of the highway bridge substructures ev. No. D2-058, to determine material characteristics substructure and evaluate the state of the bridge. In conclusion, the practical part of the recommendations for the design and method of repairing the bridge.
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Survey of Reinforced Concrete Structure
Masařík, Dominik ; Anton, Ondřej (referee) ; Cikrle, Petr (advisor)
The thesis deals with the investigation of reinforced concrete structure. The theoretical part is devoted to the general procedures for the evaluation of the existing structure. Then the methods used in the practical part of the survey are described, including state-of-the-art measuring instruments. The part focuses on the standard EN 13 791, which introduces new procedures for the evaluation of the compressive strength of a structure. The practical part deals with the investigation of a reinforced concrete beam floor supported by vertical brick piers. Due to the overloading of the new technology, the beam ceiling is assessed to see if it can accommodate the specified loads from the new equipment. The sampling of the test bodies, determination of the concrete properties, determination of the reinforcement of the individual elements and subsequent loading to the strength class are described. Also included is an evaluation of the characteristic strength of the masonry elements and the subsequent design of the structure.
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Tensional Properties of Sealants in Cement-Based Material Sealing
Boháček, Adam ; Brandtner, Michal
The article deals with sealing of cement-based materials and tensile properties of the sealed joint. Aquapanel cement board was chosen as the base material, which was treated with a primer. Then two sealants were applied, one representative of acrylic and one of polyurethane sealants. After curing, the resulting test specimens were tested according to the valid European standard ČSN EN ISO 8340, which defines the parameters of the test specimen and subsequent test procedures. The evaluation of the test, which took place visually and with a caliper measurement, showed that only polyurethane sealant could be recommended for sealing Aquapanel. This putty, unlike acrylic putty, did not show any defects after the test, so it can be stated as suitable for sealing Aquapanel cement board.
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Comparison of assessment of the state of bridges in Germany and the Czech Republic
Víša, Ondřej ; Stehlík, Michal (referee) ; Cikrle, Petr (advisor)
With the increasing age, amount and demands on the quality of bridges, the role of assessing their condition is increasingly important both in the Czech Republic and in Germany. This bachelor thesis compares the general state of bridges in both countries in its theoretical part; furthermore it compares the standards, terminology, the way of keeping record and evaluation. The practical part is reserved for survey and assessment of a bridge in Germany and for comparison purposes also in the Czech Republic. In its end the thesis summarizes the most fundamental differences between Czech and German methods.
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Survey and Assessment of highway D2 Bridge
Výpustek, Libor ; Suza, Igor (referee) ; Cikrle, Petr (advisor)
This thesis deals with the exploration and evaluation of the existing bridge carried him on the highway D2. The work is divided into theoretical and practical parts. The theoretical part focuses on the technical surveys, diagnosis of building structures and some methods of investigation and testing of building structures. In the practical part the visual inspection and diagnosis of disorders of the highway bridge substructures ev. No. D2-058, to determine material characteristics substructure and evaluate the state of the bridge. In conclusion, the practical part of the recommendations for the design and method of repairing the bridge.
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