Ing. Jan Zouhar, Ph.D.

E-mail:   zouhar@fme.vutbr.cz  Dept.:   Institute of Manufacturing Technology Position:   Director of Institute Room:   A1/1544 Dept.:   Institute of Manufacturing Technology Dept. of Machining Technology Position:   Head of Department Room:   A1/1528 Dept.:   Institute of Manufacturing Technology Dept. of Machining Technology Position:   Assistant Professor Room:   A1/1528 Dept.:   Institute of Manufacturing Technology Manufacturing Technology Division Position:   Head of Subdivision Dept.:   NeTME Centre NCC MESTEC - Manufacturing Technology Division Position:   Head of Subdivision

Supervised courses:

• Application of CAD/CAM in Technology (HC1-A)
• Application of CAD/CAM in Technology (HC1)
• Application of CAD/CAM in Technology (HC1-K)
• Application of CAM in Machining Technology (HC2-A)
• Application of CAM in Machining Technology (HC2)
• Application of CAM in Machining Technology (HC2-K)
• CAD System I (9SC1)
• CAD System II (9SC2)
• Numerical Modeling and Rapid Prototyping (HRA)
• Numerical Modeling and Rapid Prototyping (HRA-K)
• Reverse Engineering and Rapid Prototyping (9REP)

Publications:

• ZOUHAR, J.; SLANÝ, M.; SEDLÁK, J.; JOSKA, Z.; POKORNÝ, Z.; BARÉNYI, I.; MAJERÍK, J.; FIALA, Z.:
  Application of Carbon–Flax Hybrid Composite in High Performance Electric Personal Watercraft, MDPI
  journal article in Web of Science
• GREGOR, L.; ZOUHAR, J.; MÍŠA, J.; KUPČÁK, R.; SEDLÁK, J.:
  Design and validation of motorcycle single side swingarm made of CFRP using photogrammetry,
  Polymer Composites 2021 - Proceedings, pp.12-17, ISBN 978-80-01-06897-7, (2021), Czech technical University in Prague
  article in a collection out of WoS and Scopus
• ZOUHAR, J.; FIALA, Z.; JOSKA, Z.:
  Mechanical Properties of Flax and Hybrid Composite Materals,
  Polymer Composites 2021 - Proceedings, pp.74-79, ISBN 978-80-01-06897-7, (2021), Czech technical University in Prague
  article in a collection out of WoS and Scopus
• KUPČÁK, R.; ZOUHAR, J.; GREGOR, L.:
  Precision Bonding of CFRP Parts With Application In Sport Optics,
  Polymer Composites 2021 - Proceedings, pp.29-34, ISBN 978-80-01-06897-7, (2021), Czech Technical University in Prague
  article in a collection out of WoS and Scopus
• SLANÝ, M.; SEDLÁK, J.; ZOUHAR, J.; ZEMČÍK, O.; KOUŘIL, K.; POLZER, A.; POKORNÝ, Z.; JOSKA, Z.; DOBROCKÝ, D.; STUDENÝ, Z.:
  Analysis of bimetal pipe bends with a bend of 0.7D with a cladding layer of Inconel 625, SPRINGER LONDON LTD
  journal article in Web of Science
• SLANÝ, M.; SEDLÁK, J.; ZOUHAR, J.; ZEMČÍK, O.; CHLADIL, J.; JAROŠ, A.; KOUŘIL, K.; VARHANÍK, M.; MAJERÍK, J.; BARÉNYI, I.; ČEP, R.:
  Material and Dimensional Analysis of Bimetallic Pipe Bend with Defined Bending Radii, Strojarski fakultet u Slavonskom Brodu
  journal article in Web of Science
• ZOUHAR, J.; SLANÝ, M.; SEDLÁK, J.; JOSKA, Z.; POKORNÝ, Z.; BARÉNYI, I.; MAJERÍK, J.; POLZER, A.:
  APPLICATION OF FLAX HYBRID COMPOSITE ON THE HIGH PERFORMANCE ELECTRIC PERSONAL WATERCRAFT,
  BOOK OF ABSTRACTS, pp.391-392, ISBN 978-989-54808-5-2, (2021), SCIENCENTRIS
  abstract
• GREGOR, L.; ZOUHAR, J.; KUPČÁK, R.; VARHANÍK, M.; SEDLÁK, J.:
  Design and stiffness Distribution analysis of motorcycle swingarm made of carbon fiber composites,
  ENGINEERING MECHANICS 2020, pp.162-165, ISBN 978-80-214-5896-3, (2020), Brno University of Technology
  conference paper
  akce: Engineering Mechanics 2020, Online, 24.11.2020-25.11.2020
• KUPČÁK, R.; ZOUHAR, J.:
  Application of composite materials in sports optics, J. E. Purkyne University in Usti nad Labem
  journal article in Scopus
• KUPČÁK, R.; ZOUHAR, J.; JANDA, J.:
  Application of composite materials in sports optics,
  TRANSFER 2019, pp.105-116, ISBN 978-80-8075-889-9, (2019), Trenčianska univerzita Alexandra Dubčeka v Trenčíně
  conference paper
  akce: Transfer 2019, Trenčín, 21.11.2019-22.11.2019
• SLANÝ, M.; SEDLÁK, J.; ZOUHAR, J.; ZEMČÍK, O.; CHLADIL, J.; JAROŠ, A.; KOUŘIL, K.; VARHANÍK, M.; MAJERÍK, J.; BARÉNYI, I.:
  Material and Dimensional Analysis of Bimetallic Pipe Bend with Defined Bending Radii,
  TRANSFER 2019, pp.181-199, ISBN 978-80-8075-889-9, (2019), Trenčianska univerzita Alexandra Dubčeka v Trenčíně
  conference paper
  akce: Transfer 2019, Trenčín, 21.11.2019-22.11.2019
• SEDLÁK, J.; PTÁČKOVÁ, M.; NEJEDLÝ, J.; MADAJ, M.; DVOŘÁČEK, J.; ZOUHAR, J.; CHARVÁT, O.; PÍŠKA, M.:
  MATERIAL ANALYSIS OF TITANIUM ALLOY PRODUCED BY DIRECT METAL LASER SINTERING,
  International Journal of Metalcasting, Vol.7, (2013), No.2, pp.43-50, ISSN 1939-5981, AFS, Inc., USA
  journal article - other
• SEDLÁK, J.; ŘÍČAN, D.; NEJEDLÝ, J.; PTÁČKOVÁ, M.; ZOUHAR, J.; SLANÝ, M.:
  Comparison of materials produced by classical and modern additive (DMLS method) powder metallurgy,
  The International Conference NEWTECH 2011 on Advanced Manufacturing Engineering, pp.205-210, ISBN 978-80-214-4267-2, (2011), LITERA BRNO
  conference paper
  akce: NEWTECH 2011, Brno, 14.09.2011-15.09.2011
• ZOUHAR, J.; MADAJ, M.; SEDLÁK, J.; POLZER, A.:
  FEM Machining Simulation Using LS-DYNA,
  The International Conference NEWTECH 2011 on Advanced Manufacturing Engineering, pp.121-126, ISBN 978-80-214-4267-2, (2011), LITERA BRNO
  conference paper
  akce: NEWTECH 2011, Brno, 14.09.2011-15.09.2011
• DVOŘÁČEK, J.; POLZER, A.; ZOUHAR, J.; SEDLÁK, J.; PÍŠKA, M.:
  On the Application of the PVD Hard Coatings for Ball Milling of Shaped Surfaces,
  Internet Journal of Engineering and Technology, Vol.1, (2010), No.1, pp.11-18, ISSN 1338-2357
  journal article - other
• SEDLÁK, J.; PÍŠKA, M.; PTÁČKOVÁ, M.; MADAJ, M.; CHARVÁT, O.; DVOŘÁČEK, J.; ZOUHAR, J.:
  PROPERTIES OF THE BIOCOMPATIBLE TiAl6V4 MATERIAL PRODUCED BY DMLS,
  International virtual journal for science, technics and innovations for the industry, Vol.2010, (2010), No.4-5, pp.74-77, ISSN 1313-0226, Scientific-Technical Union of Mechanical Engineering
  journal article - other
• PÍŠKA, M.; ZOUHAR, J.; POLZER, A.:
  On the precise shoulder milling with an optimized 4-axis CNC machining,
  Moderní výrobní technologie pro 21. století, pp.43-47, ISBN 978-80-214-3914-6, (2009), CERM
  conference paper
  akce: Modern Production Technologies for The 21st Century, Brno, 15.10.2009-15.10.2009
• PÍŠKA, M.; ZOUHAR, J.; POLZER, A.:
  Precise Shoulder Milling with an Optimised 4-axis CNC-Toolpath Generation,
  Technologies in Machine Building, Vol.XXVII, (2009), No.2009, pp.165-168, ISSN 1221-4566, University of Galati
  journal article - other
  akce: NEWTECH 2009, Galati, 23.09.2009-25.09.2009
• PÍŠKA, M.; ZOUHAR, J.; POLZER, A.:
  Stress-strain analysis of end milling HSS cutters reflecting the wear process,
  CIRP Annual Meeting 2009, pp.1-6, (2009), CIRP
  presentation
• ZOUHAR, J.; POLZER, A.:
  Simulace tvorby třísky a opotřebení frézovacích nástrojů pomocí explicitní MKP,
  FSI Junior konference 2008 Prezentace vědeckovýzkumných prací doktorandů, pp.219-226, ISBN 978-80-214-3834-7, (2009), VUT v Brně
  conference paper
  akce: FSI Junior konference 2008, Brno, 04.02.2009-05.02.2009
• ZOUHAR, J.; PÍŠKA, M.:
  Stress-strain analysis of modern end milling HSS cutters,
  Transfer 2008, pp.76-76, ISBN 978-80-8075-357-3, (2008), Digital graphic
  conference paper
  akce: 10. medzinárodná vedecká konferencia TRANSFER 2008, Trenčín, 27.11.2008-28.11.2008
• ZOUHAR, J.; PÍŠKA, M.:
  Modelling of the Orthogonal Machining Process using Cutting Tools with Different Geometry,
  MATAR PRAHA 2008, Part 2: Testing, Technology, pp.81-86, ISBN 978-80-904077-0-1, (2008), SMT - Society for Machine Tools
  conference paper
  akce: MATAR PRAHA 2008, Praha 6, Dejvice, Technická 4, , 16.09.2008-18.09.2008
• ZOUHAR, J.; PÍŠKA, M.:
  Modelling the orthogonal machining process using cutting tools with different geometry,
  MM Science Journal, Vol.1, (2008), No.4, pp.49-52, ISSN 1803-1269, MM publishing Ltd.
  journal article - other
  akce: MATAR PRAHA 2008, Praha 6, Dejvice, Technická 4, , 16.09.2008-18.09.2008
• HADAŠ, Z.; ZOUHAR, J.; SINGULE, V.; ONDRŮŠEK, Č.:
  Design of Energy Harvesting Generator Base on Rapid Prototyping Parts,
  2008 13th Power Electronics and Motion Control Conference, pp.1688-1692, ISBN 978-1-4244-1741-4, (2008)
  conference paper
  akce: 13th International Power Electronics and Motion Control Conference, Poznan, 01.09.2008-03.09.2008
• HADAŠ, Z.; ZOUHAR, J.:
  APPLICATION OF RAPID PROTOTYPING METHOD FOR DEVELOPMENT OF MECHATRONIC SYSTEMS,
  Engineering Mechanics 2008, pp.80-81, ISBN 978-80-87012-11-6, (2008), Institute of Termomechanics, Academy of Sciences of the Czech Republic
  conference paper
  akce: Engineering Mechanics 2008, Svratka, 12.05.2008-15.05.2008
• PÍŠKA, M.; ZOUHAR, J.:
  Napjatostně-deformační analýza moderních HSS fréz,
  MM Průmyslové spektrum, Vol.2008, (2008), No.3, pp.64-66, ISSN 1212-2572, MM publishing, s.r.o.
  journal article - other
• ZOUHAR, J.; PÍŠKA, M.:
  Analýza moderních HSS fréz,
  MM Průmyslové spektrum, Vol.2008, (2008), No.3, pp.64-66, ISSN 1212-2572, MM prumyslove spektrum
  journal article - other
• ZOUHAR, J.; POLZER, A.; CIHLÁŘOVÁ, P.:
  Napjatostně-deformační analýza moderních řezných nástrojů,
  FSI Junior konference, pp.118-125, ISBN 978-80-214-3565-0, (2008), Vysoké uční technické v Brně, FSI
  conference paper
  akce: FSI Junior konference 2004, Fakulta strojního inženýrství, VUT v Brně, 10.01.2005-14.01.2005
• SEDLÁK, J.; SEDLÁČEK, J.; ZOUHAR, J.:
  Rapid Prototyping přímé výroby keramických forem pomocí CAD/CAM systémů a CNC technologie, FSI VUT v Brně
  conference paper
  akce: FSI Junior konference 2008, Brno, 04.02.2009-05.02.2009
• SEDLÁČEK, J.; SEDLÁK, J.; ZOUHAR, J.:
  A FORCE PREDICTION MODEL AND CUTTING FORCES ANALYSIS WHEN MACHINING UNIDIRECTIONAL FRP,
  FRÉZOVÁNÍ IV, pp.163-172, ISBN 80-214-3239-X, (2007), FSI VUT v BRNĚ
  conference paper
  akce: Frézování IV, FSI VUT v Brně, 31.01.2007-31.01.2007
• ZOUHAR, J.; PÍŠA, Z.; SEDLÁK, J.; SEDLÁČEK, J.:
  Produktivní obrábění s využitím metod reverzního inženýrství,
  Frézování IV, pp.189-196, ISBN 80-214-3239-X, (2007), FSI, VUT v Brně
  conference paper
  akce: Frézování IV, FSI VUT v Brně, 31.01.2007-31.01.2007
• SEDLÁK, J.; PROCHÁZKOVÁ, J.; PÍŠA, Z.; SEDLÁČEK, J.; ZOUHAR, J.:
  PŘÍMÁ B-SPLINE INTERPOLACE DRÁHY CNC NÁSTROJE Z MRAKU BODŮ,
  Frézování IV, pp.147-154, ISBN 80-214-3239-X, (2007), FSI, VUT v Brně,
  conference paper
  akce: Frézování IV, FSI VUT v Brně, 31.01.2007-31.01.2007
• ZOUHAR, J.:
  Engineering analysis in CAD systems,
  LVEM, pp.286-292, ISBN 80-214-3159-8, (2006), BUT
  conference paper
  akce: LVEM - Low Voltage Electrical Machines, Brno, Šlapanice, 13.11.2006-14.11.2006

List of publications at Portal BUT

Abstracts of most important papers:

• ZOUHAR, J.; SLANÝ, M.; SEDLÁK, J.; JOSKA, Z.; POKORNÝ, Z.; BARÉNYI, I.; MAJERÍK, J.; FIALA, Z.:
  Application of Carbon–Flax Hybrid Composite in High Performance Electric Personal Watercraft, MDPI
  journal article in Web of Science
  Within the herein presented research, we studied the applicability of flax fabrics for composite parts in personal watercrafts in order to enhance damping of vibrations from the engine and noise reduction (which is relatively high for contemporary carbon constructions). Since the composite parts are intended to be exposed to humid environments requiring high levels of mechanical properties, a carbon–flax composite was selected. Samples of carbon, fiberglass, flax, and hybrid carbon–flax twill and biax fabrics were subjected to tensile and three-point bending tests. The mechanical properties were also tested after exposure of the samples to a humid environment. Damping was assessed by vibration and noise measurements directly on the complete float for samples as well as real parts. The hybrid carbon–flax material exhibited lower values of tensile strength than the carbon material (760 MPa compared to 463 MPa), but, at the same time, significantly higher than the other tested materials, or flax itself (115 MPa for a twill fabric). A similar trend in the results was observed for the three-point bending tests. Vibration tests and noise measurements showed reductions in vibration amplitude and frequency when using the carbon–flax hybrid material; the frequency response function for the watercraft part assembled from the hybrid material was 50% lower than for that made of carbon. Testing of samples located in a humid environment showed the necessity of surface treatment to prevent moisture absorption (mechanical properties were reduced at minimum by 28%). The tests confirmed that the hybrid material is satisfactory in terms of strength and its contribution to noise and vibration damping.
• ZOUHAR, J.; FIALA, Z.; JOSKA, Z.:
  Mechanical Properties of Flax and Hybrid Composite Materals,
  Polymer Composites 2021 - Proceedings, pp.74-79, ISBN 978-80-01-06897-7, (2021), Czech technical University in Prague
  article in a collection out of WoS and Scopus
  This work deals with the study of the applicability of flax fabrics in the production of composite parts used in applications requiring material strength. The use of natural materials, in addition to environmental aspects, brings other benefits such as vibration and noise damping. Existing solutions for strength composite parts are mainly made of carbon composites, due to their low weight and high strength. To achieve high strength even with the use of flax composites, the application of a hybrid carbon - flax composite was adopted. For design and implementation purposes, several types of measurements were performed on each material specimen such as tensile test, three-point bending test and FRF based damping of the materials. The reinforcements tested were glass, carbon, flax and hybrid carbon flax with epoxy matrix. The carbon-flax hybrid material achieved the best properties in terms of the ratio of attenuation to strength.
• ZOUHAR, J.; SLANÝ, M.; SEDLÁK, J.; JOSKA, Z.; POKORNÝ, Z.; BARÉNYI, I.; MAJERÍK, J.; POLZER, A.:
  APPLICATION OF FLAX HYBRID COMPOSITE ON THE HIGH PERFORMANCE ELECTRIC PERSONAL WATERCRAFT,
  BOOK OF ABSTRACTS, pp.391-392, ISBN 978-989-54808-5-2, (2021), SCIENCENTRIS
  abstract
  This article deals with the study of the applicability of flax fabrics in the production of composite parts usable in personal watercraft. The use of natural materials, in addition to the environmental aspects, brings other benefits, such as damping vibrations and noise caused by the engine. The current solution for the production of the float is made purely of carbon composites, due to their low weight and high strength. In order to achieve high strength even when using flax composites, the application of a hybrid composite Carbon - Flax was started. For the purposes of design and implementation, several types of measurements of individual samples of materials were performed.
• KUPČÁK, R.; ZOUHAR, J.:
  Application of composite materials in sports optics, J. E. Purkyne University in Usti nad Labem
  journal article in Scopus
  CFRP (Carbon Fiber Reinforced Polymers) are often used when designing parts that need to be stiff, light and thermally stable. These benefits are a big motivation to use CFRP in many applications, one of them could be sports optics. However, optical devices require precise dimensions with tight tolerances for the optical assembly to work correctly. In order to determine if CFRP could be a suitable material of choice for sports optics a simplified body of binoculars was designed. The tubular body was manufactured by prepreg lay-up into a 3D printed mold, followed by curing in an autoclave. After the prototype was manufactured 3D measurements of the tube using 3D scanner GOM ATOS were made. As expected, shrinkage of the mold and the epoxy resin in the matrix of CFRP caused minor deformations. However, if the shape of the cured part remains unchanged during conditions similar to the general use of binoculars, then the initial deformations happening during manufacturing could be accounted for when designing the part. © 2020 Manufacturing Technology. All rights reserved.
• SEDLÁK, J.; PTÁČKOVÁ, M.; NEJEDLÝ, J.; MADAJ, M.; DVOŘÁČEK, J.; ZOUHAR, J.; CHARVÁT, O.; PÍŠKA, M.:
  MATERIAL ANALYSIS OF TITANIUM ALLOY PRODUCED BY DIRECT METAL LASER SINTERING,
  International Journal of Metalcasting, Vol.7, (2013), No.2, pp.43-50, ISSN 1939-5981, AFS, Inc., USA
  journal article - other
  This paper deals with the testing of the samples made by Direct Metal Laser Sintering (DMLS) method. This additive method is based on continuous melting of the fine layers of the metal powder by laser beam. The paper focuses on the DMLS description, analysis of the titanium alloys and experimental part. Scope of the experimental part is structure comparison of the material of hot formed and powder metallurgy (DMLS) using the scanning electron microscope. Results from the DMLS technology and conventional powder metallurgy are compared to show the advantages of the former technology.