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BRDF Editor
Waltl, Jan ; Pelikán, Josef (advisor) ; Kondapaneni, Ivo (referee)
Title: BRDF Editor Author: Jan Waltl Department: Department of Software and Computer Science Education Supervisor: RNDr. Josef Pelik'an, Department of Software and Computer Science Education Abstract: The goal of this thesis is to create a working environment for the development and testing of bidirectional reflectance functions (BRDFs). The result of our work is a graphical application that offers tools to write these BRDFs, see how they behave on dynamic 2D graphs and in simple scenes. To achieve this, we created a general framework for physically based rendering algorithms. With the help of accelerating in hardware, in particular graphics cards(GPUs), we use OpenCL API to boost performance and allow interactive work with the developed functions. As part of the work, we implemented the path tracing algorithm capable of rendering realistic-looking scenes with indirect lighting from area lights and an environment light. The used algorithm uses importance sampling to greatly improve convergence speed and allows writing these custom sampling strategies for the written BRDFs and seeing how they match the BRDF, thus testing their effectiveness. Keywords: BRDF OpenCL photo-realistic rendering path tracing GPU iii
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Comparison of certified and lowcost material for stereolithography 3D print
Sobota, Matej ; Zatočilová, Aneta (referee) ; Koutecký, Tomáš (advisor)
The aim of the bachelor’s thesis is to define basic quality parameters and compare material impact on quality of printed products. This is a comparison certified material with low-cost material using SLA-DLP method of 3D printing to reduce production costs. The thesis is focused on the comparison of two different materials based on the results of tensile and hardness tests. The effect of the color of photopolymer on material properties is also observed.
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Database of material properties
Nagy, Gašpar ; Cipín, Radoslav (referee) ; Janda, Marcel (advisor)
This bachelor’s thesis focuses to create a database of the material properties and user interface for editing these properties. The first part of the project notifies us about the basic characteristics of materials. The next point talks about the materials which are used in electrical engineering to manufacture electrical machines and other appliances. The next part of the bachelor’s thesis describes the database design of material properties. The end of the thesis describes how to use the whole user interface and how it works.
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Analisys of the material for laser cutting
Tonkovič, Miroslav ; Kolář, Ladislav (referee) ; Osička, Karel (advisor)
This thesis deals with laser cutting of metal sheets from selected steel producers. The basics of laser technologies, especially in industrial use, are described in the introductory part. There the material requirements are described from the point of view of laser cutting. The comparison of materials from different steel producers is made from different angles in the practical part. The conclusion is dedicated to the evaluation of achieved results.
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Unstability cut of laser beam at dividing limiting gauge thickness
Kadlec, Zdeněk ; Kalivoda, Milan (referee) ; Osička, Karel (advisor)
This thesis deals with the possibilities of cutting strong steel metal sheets by means of laser and problems rising from the incision, their technological investigation. The basic philosophy consists on the research of the interaction between laser bunch and material, depending on the position of focal poin and sequential results in spec. heat. It determines the main parametres of the incision (from the total quantities and matematical description) which have the biggest effect on the occurence of wide cut and perhaps even on the quality of products and consequential optimalization of these quantities.
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Design of structures with FRP reinforcement
Matušíková, Anna ; Vácha, Jaroslav (referee) ; Štěpánek, Petr (advisor)
This diploma thesis presents available FRP software for calculating load bearing capacity of the structures reinforced with FRP and compares them between each other. Furthermore theory and algorithm of my own software is presented here. Load bearing capacity of structures which are reinforced with non-metallic reinforcement and loaded by combination of normal force and bending moment can be solved by my programme. Effects of high temperatures on the concrete structures can be included in the calculation. In the second part of the thesis is calculated load-bearing capacity and deflection of the real beam reinforced with FRP reinforcement and load-bearing capacity of member with FRP reinforcement with effect of elevated temperature. This has been done using my software. Comparison of results from hand calculation and laboratory load-bearing testing is done at the end. This laboratory testing was accomplished by Institute of Concrete and Mansory Structures at our faculty.
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Dynamic Tensile Test – Material Parameters Determination
Sismilich, Vladimír ; Hadraba, Hynek (referee) ; Severa, Martin (advisor)
The purpose of the work is to summarise todays existing methods of testing materials at high strain rates and techniques of evaluation acquired experimental data. There are shown the most important dynamic materials characteristics, by which is able to describe material behaviour at high strain rates. Dynamic tensile test on Eurofer’97 steel at loading rate 1m/s was conducted experimental data were analysed and evaluated. In the evaluation The most important strain and stress properties of this steel were determined.
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Zjišťování materiálových vlastností houbovité kostní tkáně optickou metodou
Kytýř, Daniel ; Jiroušek, Ondřej ; Žák, Ondřej
Article deals with material properties of spongy bone assessed by optical identification based on surface texture registration.Strains at the specimen surface were measured using high-resolution CCD camera and optical identification method was used to trace their position during deformation. Centres of gravity of the markers are then considered to be vertices of connected triangles for which fields of displacement and strain are calculated. The assessed displacements of the structure of trabecular bone are used to obtain strain-stress diagram.
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