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Localization and identification of damage type of pneumatic drives
Richter, Vladislav ; Dočkal, Aleš (referee) ; Mazal, Pavel (advisor)
Pneumatic drives are an integral part of many machinery, with high demands on their reliability. Unfortunately, they sometimes fail, either due to improper production or assembly at the factory or by gradual degradation of moving parts and sealing elements during operation. Current diagnostic methods do not allow localization or identification of the type of damage and do not allow the operator to make a qualified decision. This work deals with the use of acoustic emission for these purposes. On PB type cylinders manufactured by Poličské strojírny a.s., a methodology is introduced which leads to the direct identification or at least localization of selected defects. By implementing this methodology in the final inspection of the production plant, the percentage of exposed pieces of waste will be increased, thus preventing accidents of these faulty pieces during operation.
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Non-Destructive Methods for Determining the Durability of Solid Fired Bricks during Reconstruction of Historical Buildings
Bartoň, Vojtěch ; Šnédar, Jaroslav ; Cikrle, Petr
This article deals with the contemporary non-destructive possibilities of determining the durability of solid fired bricks during the reconstruction of historical and monumental buildings. The durability of the solid fired bricks is closely related to the defects in the internal structure of the elements, which are usually invisible on the surface. To be possible to determine the durability of solid fired bricks, we must "look" into their internal structure. For this purpose, non-destructive methods such as ultrasonic pulse method or resonant pulse method were used in this work. The usability of these non-destructive methods was verified in-situ, on a historic bridge near the village of Mikulov.
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Research Report: Representative SHM Model
Převorovský, Zdeněk ; Joch, Jaroslav ; Kober, Jan ; Krofta, Josef ; Chlada, Milan ; Štefan, Jan ; Kunz, J. ; Ashhab, B.
The Research Report is output of the project NEMENUS dealing with methodology development of Structural Health Monitoring (SHM) for nuclear power plant components. SHM incorporates advanced methods for evaluation of structural operating safety. It consists in continuous monitoring of critical structure parts by advanced Nondestructive Testing (NDT) methods enabling assessment of their residual lifetime. The literature search part of this report comprises different aspects of the main problems including history of SHM systems applications at civil and mechanical structures, and also the newest SHM trends in nuclear and non-nuclear industry. The material damage mechanisms in nuclear power plant environment are also discussed in the report. At the report end there is indicated practical realization of the project results and SHM verification on a model structure.
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NDT in Progress 2019
Převorovský, Zdeněk
Already 10th International Workshop NDT in Progress 2019 was organized by the Czech Society for NDT (CNDT) along with the Institute of Thermomechanics of the Czech Academy of Sciences under auspices of ACADEMIA NDT International and European Federation for NDT. This unique biennial Workshops series started in 2001 with the primary aim to get together experienced NDT world experts with young people and students from various academic and industrial branches, allowing them to deeply discuss the latest state-of-the-art and progress in nondestructive testing and evaluation methodologies (NDT/NDE/SHM/CM) and new trends in both research and application areas. \nMain topics of the Workshop covered (not only):\n•Acoustic & ultrasonic methods; acoustic emission; guided waves; phased arrays.\n•Radiographic methods; infrared & terahertz waves testing.\n•Electromagnetic & magnetic methods; optical methods & defects imaging.\n•Signal & Image processing; nonlinear methods; inverse problems; time reversal.\n•Structural health and condition monitoring (SHM/CM).\n•Numerical simulations and modeling in NDT/NDE.\n•NDT for Industry 4.0 and additive manufacturing.\n
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Localization and identification of damage type of pneumatic drives
Richter, Vladislav ; Dočkal, Aleš (referee) ; Mazal, Pavel (advisor)
Pneumatic drives are an integral part of many machinery, with high demands on their reliability. Unfortunately, they sometimes fail, either due to improper production or assembly at the factory or by gradual degradation of moving parts and sealing elements during operation. Current diagnostic methods do not allow localization or identification of the type of damage and do not allow the operator to make a qualified decision. This work deals with the use of acoustic emission for these purposes. On PB type cylinders manufactured by Poličské strojírny a.s., a methodology is introduced which leads to the direct identification or at least localization of selected defects. By implementing this methodology in the final inspection of the production plant, the percentage of exposed pieces of waste will be increased, thus preventing accidents of these faulty pieces during operation.
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