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Analytical model of joint loaded perpendicular to wooden grain
Hataj, M. ; Pošta, J. ; Hasníková, Hana ; Kunecký, Jiří
Computing models for structural behaviour and determination of traditional timber butt joints using analytical relations are presented in this paper. A component method is the base of the computing technique introduced herein. This method is usually used for steel joint design. The component method is based on dividing a joint into individual components. These are defined by partial joint component stiffness. An analytical solution includes a subsidence effect of wooden material close to compressive loading. Analytical computation results are compared with the experimental outputs. A design procedure according to Eurocode 5 for a load capacity determination of perpendicularly loaded structural elements is stated in the paper.
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Diagnostics brakes – start braking power
Rádl, Jakub ; Pexa, Martin (advisor) ; Pošta, Josef (referee)
The goal of this thesis is to analyze the current state of vehicle brakes construction, possibilities of measuring the brake power, braking deceleration and to analyze the influence of pipe diameter to the beginning braking force, based on data from the measuring in the dynamic cylindrical testing lab.
In the first part are described braking systems and Czech and International legislation, which have to comply with all road vehicles. The section also describes ABS, the modern brake system elements and testing methods that measure the requirements of the braking effect. The next section discusses the methodology of measuring and describes the experimental cylindrical test at Czech Agricultural University in Prague.
In this thesis, they are processed and evaluated the data obtained from the measurement. At the conclusion are summarized the findings from the data evaluation and overall assessment of the influence of pipe diameter to beginning braking power.
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The selected properties mineral and synthetic oils
Vu Tân, Hien ; Pošta, Josef (advisor) ; Pavlů, Jindřich (referee)
The main goal of this thesis is focused on comparing the selected properties of mineral and synthetic oils. For this was used operating monitoring and laboratory experiment and with them was compared properties. At operation was observed oxidation, sulfation, nitration, TAN, TBN and the content of metal elements in the oil. In Laboratory was experimental investigated the effect of increased temperature and change of color , viscosity and lubricity. The theoretical part of the thesis describes the basic of tribology and lubrication engineering, types of lubricants and oil properties and their production and distribution.
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