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Slisovatelnost dýh pro použití ve vrstvených lepených materiálech
Krejčíř, Michal
This bachelor work is based on studies of physical and mechanical properties of plywoods with various composition. The goal of research was to determine the influence of pre-pressed beech veneer on bending properties. There is also review of plywoods manufacturing in the work. The properties of plywood were tested according to EN standards and evalueted by descriptive statistics and Analysis of variance.
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Analýza mechanických vlastností balzového dřeva na mesoúrovni pomocí zkušebního stroje iErudio
Grossová, Olga
This thesis analysis the mechanical properties of balsa wood mesolevel using the test machine iErudio. The thesis aim is to experimentally determine the mechanical properties of balsa wood (Ochroma lagopus). On the prototype minimachine iErudio is a set of measurements. Specifically, tensile and bending tests. Another objective is to determine the Poisson ratio on measured levels. These properties will be obtained from image data recorded device iErudio and calculated using the digital image correlation. Another objective is to evaluate the work done with the prototype device, point out the advantages and disadvantages. To analyse data using a commercial computer program VIC 3D and Mercury RT, which process the results using digital image correlation. The work has provided us with confirmation of mechanical characteristics of balsa and the suitability of using "minimachine" iErudio the performed tests.
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Pevnost lepeného spoje vodáckých pádel
Jonáš, Martin
This work deals with the strength of the bond with paddles made of solid wood. The samples were made of solid wood blanks from spruce, alder and ash. There were used three types of adhesives in samples - polyvinyl acetate, melamine-urea-formaldehyde and epoxy resins. For these samples the effect of the species and different types of adhesive bonded joints for strength in bending was studied. Also described herein is cutting samples, bonding joints and their testing methodology. In the literature review are discussed various issues such as conditions affecting the adhesive bond, the adhesive film formation components adhesives etc., that are associated with this topic.
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