National Repository of Grey Literature 43 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Nondestructive testing in current industrial practice
Jakubcová, Eliška ; Klakurková, Lenka (referee) ; Juliš, Martin (advisor)
The bachelor thesis is focused on personnel certification of non-destructive testing according to valid standards. The theoretical part compares the Czech certification system for non-destructive testing with systems in other countries and evaluates their differences. Problems that occur during certification according to ČSN EN ISO 9712 are also discussed. In the practical part of the thesis the evaluation of the test sample is documented by means of radiographic test, magnetic particle test and leak test. At the end of the thesis the results are evaluated and discussed and also described in the form of measuring protocols.
Monitoring and Analysis of Corrosion of Reinforcing Steel in Reinforced Concrete Elements and Structures Using the Acoustic Methods
Timčaková, Kristýna ; Semerák,, Petr (referee) ; Medveď,, Igor (referee) ; Vaněrek, Jan (referee) ; Chobola, Zdeněk (advisor)
The dissertation thesis deals with the study of non-destructive acoustic methods as instruments for monitoring and analysing corrosion of reinforcing steel in reinforced concrete elements. Four acoustic methods were selected for this task - the impact-echo method, the nonlinear acoustic spectroscopy method, the acoustic emission method, and the ultrasonic pulse velocity method. To verify the functionality of these methods, testing was carried out on three sets of reinforced concrete samples that had been exposed to the effects of sodium chloride, which corroded the embedded steel reinforcement in these samples. Suitable parameters were proposed for individual acoustic methods to monitor corrosion of the reinforcements. In addition, experiments were designed to demonstrate the ability of the selected acoustic methods to reveal the corrosion of steel reinforcement and its influence on the concrete matrix and to assess the condition of the degraded elements and structures. The analysis of the measurement results based on their comparison shows the advantages and disadvantages of the individual methods and of their practical applications. To verify the results, correlation with common methods that are currently used for the study of corrosion was carried out and included for example the electrical resistivity measurement of the reinforcement and simultaneous monitoring of the sample surface using a confocal microscope to record the development of microcracks during the degradation.
The Influence of Specimen Size on the Values of Material Characteristics Determined using the Resonance Testing
Čaněk, Michal ; Cikrle, Petr (referee) ; Kocáb, Dalibor (advisor)
The bachelor's thesis deals with influence of specimen size on the values of material characteristics determined using the resonance testing. Different sizes and shapes of specimen made from two different concretes were tested in the experiment. The specimens were tested to determine the dynamic material characteristics (especially dynamic modulus of elasticity). The results were summarized in tabular and graphical form and were examined by simple statistical analysis to determine resulting conclusions.
Non-destructive survey of the oldest part of the castle in Telč
Drdácký, Miloš ; Eisler, Marek ; Lesák, Jaroslav ; Válek, Jan ; Skružná, Olga
Recent archaeological findings discovered at an excavation in the southeastern section of the small courtyard of the old palace at the state castle in Telč sparked interest in further exploring hidden structures below ground and within the existing masonry. Therefore, a non-destructive survey of structures hidden beneath the current level of the courtyard using ground-penetrating radar was conducted, as was a survey of the masonry within the old walls of the palace using thermography.
Summary report on radiographic documentation of figurative decorations in the Bučovice castle ceremony hall
Valach, Jaroslav ; Eisler, Marek
This report summarizes the results of radiographic and endoscopic investigation of stucco and figural decorations located in the ceremony hall at the castle in Bučovice, Vyškov county. The internal structure of the statues and ornaments and their varying degree of fracture damage was documented using a portable set comprised of source and recording plates. The support structures used by the original artists as a vantage point for the modelling of their intended shapes were revealed and examined by means of radiography and endoscopy. This data is important for the art historian’s investigation of this cultural monument. Included in the report is a set of photographs and radiographs and their interpretation.
Localization of reinforcement in elements of reinforced concrete structure
Fusek, Aleš ; Anton, Ondřej (referee) ; Cikrle, Petr (advisor)
This bachelor thesis deals with the search for non-destructive methods of reinforcement in concrete structures using electromagnetic indicators. The theoretical part describes the methods of diagnosis reinforcement capabilities and limitations of the methods of electromagnetic indicators and comparisons with other methods. Furthermore, a overview of the reinforcement used in the 60s of the last century. The practical part describes the measurement on reinforced concrete construction hall and compares it with the measurement obtained on the models in the laboratory at the focus of the sensitivity of measurements and data processing.
The Use of the Ultrasonic Pulse Velocity Test for the Determination of Concrete Homogeneity in a Structure
Jindrová, Barbora ; Daněk, Petr (referee) ; Kocáb, Dalibor (advisor)
The bachelor thesis deals with the basics of diagnostics of structures and states the most frequently used methods. In the context of non-destructive diagnostics, there is described the ultrasonic pulse velocity test in detail, along with it’s principle and possible ways of application. The main content of the thesis is description and application of several approaches that are offered by the ultrasonic pulse testing instrument Pundit PL-200 by Proceq SA. The results of several measurements, performed both in laboratory and in situ, are processed here, focusing mainly on the assessment of the comparability of values acquired with different measuring settings on the same element. Another conclusion is the determination of concrete homogeneity in the structures according to the standard ČSN 73 2011.
Preliminary survey and assessment the building before renovation
Bartoň, Vojtěch ; Stehlík, Michal (referee) ; Cikrle, Petr (advisor)
This bachelor thesis deals with the construction and technical survey of a masonry building with cast iron columns. Construction-technical survey was carried out, due to the planned conversion of the building into a apartment building with public services. The thesis contains description of construction and technological survey and diagnostic methods, which includes evaluation of essential characteristics of masonry structures and cast iron columns. The practical part contains processing of diagnostic survey. Its result is determination of material and geometric characteristics of the structure.
Methods of non-destructive testing of materials and products
Vontor, Jakub ; Mouralová, Kateřina (referee) ; Prokeš, Tomáš (advisor)
The aim of this bachelor thesis is to perform a search of methods of non-destructive testing and to choose a right method for experimental test of sample. Bachelor thesis is mainly focused on the methods which are used for inspection of welds. Result of experimental non-destructive test is important to verify by destructive inspection.
Automation of test line for flaw detection of railway wheels
Hubený, Marek ; Matz,, Václav (referee) ; Pásek, Jan (advisor)
This thesis describes the design and implementation of a control system for testing line using ultrasonic testing and magnetic particle testing. The test line is designed for non-destructive testing of railway wheels with detection and localization of surface and subsurface defects. The thesis describes the design and operating principles of the test line. On this basis, the design of a control system that controls various processes throughout the test line is clearly described. The proposed control system was implemented in the industrial application.

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