Internship positions at the Faculty of Mechanical Engineering

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1 STUDY OF PLOUGHING FORCES ON THE FLANK FACE OF CUTTING TOOLS In machining with small uncut chip thicknesses (for example, in micro milling), the ploughing forces may be higher than those on the front face. A new method for determining the ploughing forces will be used for increasing the accuracy of determining the ploughing force. This new method was named «the comparison method of the total forces for different areas». Increasing the accuracy of determining the ploughing force is based on measuring the real area between the rear surface of the tool and the processed material. Time period stay ( ) / students 2 / 2 students prof. Ing. Alexey POPOV, DrSc. alespopov@yandex.ru Department of Machining and Assembly

2 Experimental and theoretical research of mechanical properties of composite materials. Experimental and theoretical research of mechanical properties of composite materials: Green composites - mainly acrylic resin matrix reinforced by natural fibers, textiles and particles. Materials are used in the automotive industry and in the production of consumer goods such as furniture, sport equipment, etc. Composites with geopolymeric matrix - reinforced by glass and basalt fibers and textiles. Materials for panels resistant to high temperatures and fire. Magnetosensitive composites - elastomeric matrix reinforced by iron particles, stiffness and damping properties of these composites can be controlled by external magnetic field. The composites are used in vibration dampers. Composite of shape memory filled by various micro- or nanoparticles - fabrication of SMP composites made of different commercially available or newly developed SMP materials filled by suitable particles in the aim to obtain the composites of controllable mechanical and thermal properties. Activities in the framework of internship: Preparation and fabrication of composites, preparation of samples, laboratory testing of samples, evaluation tests and the determination of mechanical properties. Determining the response of composites after having been exposed to unfavorable environmental influences (high temperature, humidity, etc.). Time period September 2018 to October 2018 stay ( ) / students 2 / 2-3 students prof. Ing. Bohdana Marvalová, CSc. bohda.marvalova@tul.cz doc. Ing. Iva Petríková, Ph.D. iva.petrikova@tul.cz Department of Applied Mechanics

3 Mathematical model of a wheel-less vehicle driven by collaborative action of the friction/adhesive forces and the dynamical forces generated by two (or more) unbalanced rotors. The mathematical model will be created using student's preliminary theoretical knowledge in multibody kinematics and dynamics. The model will be implemented on a computer in some mathematical software like Matlab, Maple, Mathematica etc. The internship student is considered to have excellent background in mathematics including calculus, linear algebra and (systems of) ordinary differential equations as well as numerical mathematics. Result data provided by the model in different case studies should be analyzed to enable optimization of the entire structure of the vehicle from point of view of its working properties. Time period October 2018 to November 2018 stay - 2 Assoc. Prof. Ing. Miroslav Šír, CSc. miroslav.sir@tul.cz Assoc. Prof. Ing. Iva Petríková, Ph.D. iva.petrikova@tul.cz Department of Applied Mechanics

4 Design of individual belt tensioning During the internship, the student will propose a method of individual tensioning of the belt conveyor belts on the fulling machine. The steps of the internship programme are: 1. Design of several principles of belt tensioning 2. Choosing the best solution 3. Design of the selected variant 4. Optimization and integration of the chosen solution into the fulling machine Time period from June 2018 to September 2018 traineeship - 2 Šimon Kovář, Ph.D. simon.kovar@tul.cz Martin Konečný, Ph.D. martin.konecny@tul.cz Department of Textile Machine Design

5 Application of linear servo motors in the textile industry This work will focus on analyzing the possibilities of substitution of the mechanical kinematic chains by the linear servo motors. Searches of commercially available linear servo motors and their potential applications in the textile machines will be carried out. Based on the kinetic analysis, the appropriate parameters of linear servo motors will be established for the selected application. Furthermore, the design and construction of a test apparatus and the selection of an appropriate stroke function for simulation of the selected application will be carried out. The solution will be experimentally verified. Finally, optimization of the stroke function to achieve the maximum performance will be performed. Time period ca. from March 2018 to October 2018 stay - ca. 6 Jiří Komárek, jiri.komarek@tul.cz Department of Textile Machine Design

6 Linear AC-Electrode with integrated pump system for production of nanofibers The internship position is focused on the design of a new version of electrode for production of nanofibers using the AC-electrospinning method. AC electrodes are equipped with the integrated screw-pump system which delivers the polymeric solution to the active zone of the electrode. The aim of this task is to design a linear version of such electrode in order to produce linear nanofibrous structure used for various applications. The work on this task includes 3D model design using the CAD software Creo Parametric supported by the CAE tool Autodesk Multiphysics Mechanical for analysis of electric field. It is assumed, the student will assists with the manufacture of the electrode prototype as well as with technological tests of the new electrode on an AC electrospinning device. Time period from August 2018 to September 2018 traineeship - 2 Jan Valtera, Ph.D., M.Sc. jan.valtera@tul.cz phone: Department of Textile Machine Design CV, Letter of motivation, Transcript of Records