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National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Study of possibilities of optimalization of properties of alternative thermal insulating materials on natural base
 Břicháček, Pavel ; Peterková, Jitka (referee) ; Zach, Jiří (advisor)
The presented work investigates the mechanisms of propagation of heat and moisture in the structure of heat-insulating materials based on natural fibers. The main aim of this work is the experimental verification of theoretical patterns, which are involved in the transport of heat and moisture in fibrous materials, especially the influence of fibers thickness and density of the fibrous materials. To widen outputs of the work were selected different kinds of natural fiber materials of vegetable and animal origin. The results of the work should help to optimize the production processes of natural insulation materials considering their optimal thermal properties. From the data collected are deduced general conclusions to better understanding the behavior of these materials.
Detailed record
Kompozitní materiál vyztužený skelnými vlákny s různou orientací
 Brychta, Ondřej
The aim of this diploma thesis is an experimental comparison of mechanical proper-ties of composite materials reinforced with differently oriented glass fibers. These were samples of polyurethane resin with a needled mat, which is used in the floor of buses as a supporting element of floors. The theoretical part is focused on the composition, composition of fibers and distri-bution of individual types of composite materials and on determining the production method that can be used in the production of composite materials in various areas of industry. At the same time, a comprehensive methodology for recording failure of composite material during tensile loading was proposed in the experimental part. During loading, samples were monitored by the optical digital image correlation (DIC) method to identify deformations on the test samples. This method has become a suitable tool for evaluation and characterization of the deposition of individual fabrics in tested samples. Thanks to this me-thod, individual failures occurring during tensile loading were detected. These were divided into certain typical phases of composite material failure. The samples for the experimental part are samples of polyurethane resin reinforced with a needled mat. The reinforcement structure is composed of a total of 6 layers. It is a two-layer material composed of woven roving and chopped mat. On the back of the U-profile is reinforced with glass-roving.
Detailed record
Study of possibilities of optimalization of properties of alternative thermal insulating materials on natural base
 Břicháček, Pavel ; Peterková, Jitka (referee) ; Zach, Jiří (advisor)
The presented work investigates the mechanisms of propagation of heat and moisture in the structure of heat-insulating materials based on natural fibers. The main aim of this work is the experimental verification of theoretical patterns, which are involved in the transport of heat and moisture in fibrous materials, especially the influence of fibers thickness and density of the fibrous materials. To widen outputs of the work were selected different kinds of natural fiber materials of vegetable and animal origin. The results of the work should help to optimize the production processes of natural insulation materials considering their optimal thermal properties. From the data collected are deduced general conclusions to better understanding the behavior of these materials.
Detailed record

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