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The analysis of acoustic properties of innovative wood-based materials
Svojanovský, Jan ; Nop, Patrik (referee) ; Jirásek, Ondřej (advisor)
The content of this work is research of innovative wood-based materials in the acous-tic perspective. Basically, the goal is to determine the influence of the internal structure of the wood-based material on variables, which are sound speed, acoustic resistance, or acous-tic constant. In total were measured 15 samples, each one was made in a different way. Each sam-ple was weighted, and the length of its sides was measured. By using the ultra sonic timer, it was measured the time of the sound impulses, which go through the samples in all of their axes for the purpose of observation the influence the fibers on speed of sound in the materi-al. The next thing to do was to determine another magnitude, which describe acoustic of the material. All measurements were taken in room conditions (room humidity). Six of the sam-ples, which were randomly selected from those 15 samples, were measured once again after two weeks. In those two weeks were all the samples saved in air-conditioned place in which was the room humidity distinct lower. In the end all the samples were compared with each other and they were also com-pared with materials which are commonly used in production of musical instruments or acoustic components. Possible use in the music industry was assigned to each sample.
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Additional reinforcement of wood elements
Janoušek, Radek ; Vejpustek,, Zdeněk (referee) ; Vaněrek, Jan (advisor)
This diploma thesis deals with the possibilities of additional reinforcement of wooden elements using different types of BFRP materials. In the practical part, an experiment of reinforcing plywood with external reinforcement using BFRP fabrics with different basis weights was performed. As part of the strength tests performed, the specimens were subjected to bending and shear stresses. To verify the bonding quality of the plywood, the bodies were exposed to the effect of elevated temperature and a delamination test was performed to determine the bonding quality of the plywood joints. The achieved values were evaluated and compared with the available literature.
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Development of wood-based board materials applying thermal modification process
Buriánek, Vlastimil ; Pipíška,, Tomáš (referee) ; Vaněrek, Jan (advisor)
This diploma thesis deals deals with the effectiveness of polyurethane and phenol-resorcinol-formaldehyde adhesives when applied in bonded joints of thermally treated sheet materials. The thermal resistance of commercially used adhesives was analysed as part of a research activity. Furthermore, the changes in the properties of wood materials after heat treatment were described. In the practical part, the effectiveness of the used adhesives on densified birch plywood was verified with respect to the shear strength of the resulting composite. Based on the results obtained, it was proceeded to verify the effectiveness of densification on spruce plywood.
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Innovative wood-based materials
Buriánek, Vlastimil ; Brožovský, Jiří (referee) ; Vaněrek, Jan (advisor)
This bachelor’s thesis deals with the issue of optimizing the modification process for plywood boards. Optimization consists mainly in evaluating different densification methods with different parameters of plasticization and stabilization. Psychical parameters (bulk density, swelling, water absorption) and strength parameters (bending strength, modulus of elasticity) of modified plates were chosen for the evaluation parameters. The practical part involved the verification of two thickening treatments on birch plywood.
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Nábytkový sedací prvek s použitím lamelových, případně tvarově překližovaných prvků
Matúš, Rudolf
Rudolf Matúš: Furniture seating element with the use lamellar or shaped plywood elements. The main focus of this bachelor thesis is the design and production of a seating element according to the assignment. The first part of the thesis is devoted to the theory, topic of sesating, introduction to the materials used, furniture joints, surface finishes, ergonomics, etc. After the completion of the theoretical part, the practical part follows, which summarizes the theoretical information from the introduction of the thesis and is supplemented by testing the prototype for strength and stability.
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Svítidlo do interiéru
Do, Bao Nhi
The bachelor's thesis deals with the design and construction of a decorative interior lighting created using CNC laser technology. The theoretical part of the thesis briefly describes the physics of light, light sources and their parameters, lighting requirements and the effect of light on human health and sleep. The research shows the current design of the lights with the chosen restriction – the use of the wood veneer in the construction of the shade. The work describes the chosen technology for lightshade production – CNC laser cutting. The practical part describes the entire design process of creating the lamp design from the initial inspiration, sketches and drawings to the production of the final product.
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Mobiliář pro děti do interiéru
Světlíková, Klára
The thesis focuses on the design of interior furniture for children - learning towers made of plywood, designed for the kitchen, bathroom, workshop, etc. The theoretical part of the thesis is devoted to the toddler, his development, play, general, hygienic and safety requirements for toys, learning towers, Montessori philosophy and the materials and finishes used. The practical part describes the process of designing a learning tower including market research, sketches, selection of the final design, dimensioning and construction, 3D visualization, stability calculation, material calculation. The final output is the realization of a functional prototype.
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Pevnost lepených spojů obkladových panelů břízová překližka sklo
Matějovská, Lucie
The diploma thesis deals with gluing selected types of wooden materials (birch and beech plywood) with glass and two types of adhesives (Sikasil SG-20 and Soudal PU Construct). The strength of bondes splices was measured by tensile and bending test in an Instron 3365 tensile test machine. The theoretical part focused introduction of basicofbonding technology. The practical part focused made of bonding splicesand evaluation of results from tensile and bending test.
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Innovative wood-based materials
Buriánek, Vlastimil ; Brožovský, Jiří (referee) ; Vaněrek, Jan (advisor)
This bachelor’s thesis deals with the issue of optimizing the modification process for plywood boards. Optimization consists mainly in evaluating different densification methods with different parameters of plasticization and stabilization. Psychical parameters (bulk density, swelling, water absorption) and strength parameters (bending strength, modulus of elasticity) of modified plates were chosen for the evaluation parameters. The practical part involved the verification of two thickening treatments on birch plywood.
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