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620 results on '"Hloch, Sergej"'

1. Optimisation of Abrasive Waterjet Milling Technique for Pocket Milling Operations

Author

Nag, Akash, Klichová, Dagmar, Hlaváček, Petr, Petrů, Jana, Hloch, Sergej, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Haddar, Mohamed, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Kwon, Young W., Editorial Board Member, Tolio, Tullio A. M., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Schmitt, Robert, Editorial Board Member, Xu, Jinyang, Editorial Board Member, Sitek, Libor, editor, Valentinčič, Joško, editor, Trieb, Franz H., editor, and Hloch, Sergej, editor

Published
2025
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2. The Effect of Multiple Impacts of Water Droplets on the Integrity of CFRP Composite

Author

Chlupová, Alice, Poloprudský, Jakub, Nag, Akash, Hloch, Sergej, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Haddar, Mohamed, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Kwon, Young W., Editorial Board Member, Tolio, Tullio A. M., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Schmitt, Robert, Editorial Board Member, Xu, Jinyang, Editorial Board Member, Sitek, Libor, editor, Valentinčič, Joško, editor, Trieb, Franz H., editor, and Hloch, Sergej, editor

Published
2025
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3. Influence of Erosion Time on HVOF-Sprayed Cermet Coating: Preliminary Study

Author

Poloprudský, Jakub, Vražina, Tomáš, Nag, Akash, Stolárik, Gabriel, Chlupová, Alice, Zábranský, Karel, Gejdoš, Pavel, Čelko, Ladislav, Hloch, Sergej, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Haddar, Mohamed, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Kwon, Young W., Editorial Board Member, Tolio, Tullio A. M., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Schmitt, Robert, Editorial Board Member, Xu, Jinyang, Editorial Board Member, Sitek, Libor, editor, Valentinčič, Joško, editor, Trieb, Franz H., editor, and Hloch, Sergej, editor

Published
2025
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21. Effect of Water Flow Rate on Operating Frequency and Power During Acoustic Chamber Tuning

Author

Nag, Akash, Stolárik, Gabriel, Svehla, Brano, Hloch, Sergej, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, di Mare, Francesca, Series Editor, Hloch, Sergej, editor, Klichová, Dagmar, editor, Pude, Frank, editor, Krolczyk, Grzegorz M., editor, and Chattopadhyaya, Somnath, editor

Published
2021
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22. On-Line Monitoring of In-Vitro Application of PWJ for Bone Cement Disintegration

Author

Nag, Akash, Hloch, Sergej, Dixit, Amit Rai, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, di Mare, Francesca, Series Editor, Hloch, Sergej, editor, Klichová, Dagmar, editor, Pude, Frank, editor, Krolczyk, Grzegorz M., editor, and Chattopadhyaya, Somnath, editor

Published
2021
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23. Identification of Local Microplasticity on Ti6Al4V After Impingement of Periodically Acting Water Clusters

Author

Poloprudský, Jakub, Chlupová, Alice, Kruml, Tomáš, Hloch, Sergej, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, di Mare, Francesca, Series Editor, Hloch, Sergej, editor, Klichová, Dagmar, editor, Pude, Frank, editor, Krolczyk, Grzegorz M., editor, and Chattopadhyaya, Somnath, editor

Published
2021
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24. Effect of Acoustic Chamber Length on Disintegration of Ductile Material with Pulsating Water Jet

Author

Nag, Akash, Hloch, Sergej, Babu, Avinash Babu Ramesh, Hromasova, Monika, Dixit, Amit Rai, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, di Mare, Francesca, Series Editor, Hloch, Sergej, editor, Klichová, Dagmar, editor, Pude, Frank, editor, Krolczyk, Grzegorz M., editor, and Chattopadhyaya, Somnath, editor

Published
2021
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25. Effect of Standoff Distance on the Erosion of Various Materials

Author

Poloprudský, Jakub, Chlupová, Alice, Kruml, Tomáš, Hloch, Sergej, Hlaváček, Petr, Foldyna, Josef, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, Klichová, Dagmar, editor, Sitek, Libor, editor, Hloch, Sergej, editor, and Valentinčič, Joško, editor

Published
2021
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26. Erosion of Titanium and Aluminium Alloys Using Pulsating Water Jet: Effect of Standoff Distance

Author

Čuha, Dominik, Nag, Akash, Chlupová, Alice, Hloch, Sergej, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, Klichová, Dagmar, editor, Sitek, Libor, editor, Hloch, Sergej, editor, and Valentinčič, Joško, editor

Published
2021
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27. Mechanical Strengthening of Anti-Corrosive Surface Layers by Water Jet

Author

Stancekova, Dana, Hloch, Sergej, Cuha, Dominik, Sajgalik, Michal, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, Klichová, Dagmar, editor, Sitek, Libor, editor, Hloch, Sergej, editor, and Valentinčič, Joško, editor

Published
2021
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39. COMPARISON OF THE EFFECTS OF STANDARD NOZZLES AND EXTENSION TUBES ON THE EROSION OF PMMA USING PULSATING WATER JET TECHNOLOGY.

Author

Nag, Akash, Stolarik, Gabriel, and Hloch, Sergej

Subjects
JET nozzles, ARTHROPLASTY, BONE cements, TRAUMA surgery, MUSCULOSKELETAL system injuries
Abstract

The study of bone cement disintegration is important for advancing orthopedic and trauma surgery outcomes. Bone cement, commonly used in joint replacement procedures, plays a vital role in fixation implants. However, the long-term stability and integrity of bone cement are critical for the success of these procedures. This study focuses on the use of ultrasonic pulsating water jet technology for the selective removal of bone cement, aiming to provide a precise and efficient method for revision surgeries. The disintegration efficiency is measured in terms of depth, width and volume of the disintegrated bone cement as a result of variations in the nozzle geometry, supply pressure and traverse speed. Two different nozzle types, the standard nozzle insert and nozzle with an extension tube of 100 mm having a diameter of 0.3 mm, are used. Two supply pressure levels were taken as 10 and 20 MPa with five levels of traverse speeds as 0.5, 1, 1.5, 2 and 2.5 mm/s. The results showed an increased disintegration efficiency for all experimental conditions using an extension tube nozzle as compared to a standard nozzle (20 - 25% in terms of disintegration volume). Also, the disintegration efficiency increased with higher pressure level values (8.2 mm3 and 4.85 mm3 for p = 20 and 10 MPa, respectively) and lower traverse speed values. The results showed a promising direction in terms of the utilization of an ultrasonic pulsating jet with a modified nozzle type for higher bone cement disintegration efficiency. [ABSTRACT FROM AUTHOR]

Published
2024
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50. MAXIMIZATION OF WEAR RATES THROUGH EFFECTIVE CONFIGURATION OF STANDOFF DISTANCE AND HYDRAULIC PARAMETERS IN ULTRASONIC PULSATING WATERJET.

Author

Nag, Akash, Dixit, Amit Rai, Petrů, Jana, Váňová, Petra, Konečná, Kateřina, and Hloch, Sergej

Subjects
DETERIORATION of materials, MECHANICAL wear, SURFACE topography, ALUMINUM alloys, CROSS-sectional imaging, WATER jets
Abstract

A pulsating waterjet is a technological modification of a conventional waterjet that utilizes ultrasonic vibrations to generate a modulated jet, resulting in repetitive fatigue loading of the material. The erosion efficiency of the ultrasonic pulsating waterjet is majorly determined by the hydraulic factors and its interaction with standoff distance. However, the dependency of the wear rates on different hydraulic factors and formulation of an implicit prediction model for determining effective standoff distance is still not present to date. Therefore, in this study, the combined dependency of the supply pressure (20-40 MPa), nozzle diameter (0.3-1.0 mm), and standoff distance (1-121 mm) on wear rates of AW-6060 aluminum alloy are studied. Statistical analysis is used to determine the statistically significant factors and formulate regression equations to determine output responses within the experimental domain. The surface topography and sub-surface microhardness of the eroded grooves were studied. The results show that both the disintegration depth and the material removal increase with an increase in the nozzle diameter and supply pressure. However, the dependency of the output responses on nozzle diameter is statistically more evident than supply pressure and two-way interactions. Cross-sectional images of the grooves showed typical hydrodynamic erosion characteristics in erosion cavities, subsurface voids, and material upheaving. The results of microhardness analysis showed an approximately 15-20% increase in hardness values compared to the untreated samples. [ABSTRACT FROM AUTHOR]

Published
2024
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