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Agglomeration of animal feed mixtures
Moravec, Jan ; Lacina,, Lubor (referee) ; Svěrák, Tomáš (advisor)
The theoretical part of this work focuses on the description of mechanical properties of compound feed produced in cooperation with Mendel University in Brno. These properties are mainly flow properties, which are crucial for the technological processes of these mixtures. The first part of this work also contains a general information about commonly used shear devices. Jenike's Shear Cell and Rheometer FT4 from company Freeman Technology are described in more detail. Because of the complexity of the behavior of these materials, their properties are mostly found the experimental way, which is the main topic of the practical part of this work. In this section you can find a description of measurements performed on Jenike's Shear Cell and on the Rheometer FT4. Moreover measurements of strength and length of granules were undertaken. Further the analysis of powder feed mixtures on sieves is described. Materials analyzed were compound feeds for chickens. Mutually they differed in the content of mealworms. Pellets were made from the mixtures and were then also subjected to measurement.
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Bulk properties of fine particulate solids as the function of the selected material parameters.
Slanina, Ondřej ; Roman,, Fekete (referee) ; Svěrák, Tomáš (advisor)
The theoretical part of the thesis focuses on the description of particulate materials and their mechanical behaviors with a focus on flow properties. Great emphasis is placed on measuring the shear properties using a Jenike shear machine, on the correct procedure for standardized measurement and evaluation using Mohr's circles. The theoretical part focuses on the characterization of particulate matter using a variety of methods available, such as visual, separation, sedimentation, surface methods and methods of scanning field and flow. The practical part is focused on the determination of flow characteristics and surface finishing of finely ground limestone Omyacarb VA with various grain sizes. The surface was modified using stearic acid and calcium stearate. Attention was paid to the influence of the concentration of surface-regulating substances on the flowability of the material. The flowability of commercially supplied material was compared with lab modified materials and the determination of the theoretical content of stearic acid or calcium stearate was accomplished. Shear properties were measured using the Jenike shear machine. The material was further tested by laser diffraction and SEM with EDS particle surface analysis and elemental surface mapping.
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3D models of stress tensor
Stieber, Petr ; Pokorný, Přemysl (referee) ; Malášek, Jiří (advisor)
The aim of this bachelor´s thesis is to create 3D models of stress tensor. Mohr´s circles serve as a base for identification of size and direction of stress component. These are then used for the 3D modelling in software Rhinoceros. Final models in the form of colored areas show general, normal and shear stress for the individual states of stress.
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Agglomeration of animal feed mixtures
Moravec, Jan ; Lacina,, Lubor (referee) ; Svěrák, Tomáš (advisor)
The theoretical part of this work focuses on the description of mechanical properties of compound feed produced in cooperation with Mendel University in Brno. These properties are mainly flow properties, which are crucial for the technological processes of these mixtures. The first part of this work also contains a general information about commonly used shear devices. Jenike's Shear Cell and Rheometer FT4 from company Freeman Technology are described in more detail. Because of the complexity of the behavior of these materials, their properties are mostly found the experimental way, which is the main topic of the practical part of this work. In this section you can find a description of measurements performed on Jenike's Shear Cell and on the Rheometer FT4. Moreover measurements of strength and length of granules were undertaken. Further the analysis of powder feed mixtures on sieves is described. Materials analyzed were compound feeds for chickens. Mutually they differed in the content of mealworms. Pellets were made from the mixtures and were then also subjected to measurement.
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|
|
Bulk properties of fine particulate solids as the function of the selected material parameters.
Slanina, Ondřej ; Roman,, Fekete (referee) ; Svěrák, Tomáš (advisor)
The theoretical part of the thesis focuses on the description of particulate materials and their mechanical behaviors with a focus on flow properties. Great emphasis is placed on measuring the shear properties using a Jenike shear machine, on the correct procedure for standardized measurement and evaluation using Mohr's circles. The theoretical part focuses on the characterization of particulate matter using a variety of methods available, such as visual, separation, sedimentation, surface methods and methods of scanning field and flow. The practical part is focused on the determination of flow characteristics and surface finishing of finely ground limestone Omyacarb VA with various grain sizes. The surface was modified using stearic acid and calcium stearate. Attention was paid to the influence of the concentration of surface-regulating substances on the flowability of the material. The flowability of commercially supplied material was compared with lab modified materials and the determination of the theoretical content of stearic acid or calcium stearate was accomplished. Shear properties were measured using the Jenike shear machine. The material was further tested by laser diffraction and SEM with EDS particle surface analysis and elemental surface mapping.
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|
|
3D models of stress tensor
Stieber, Petr ; Pokorný, Přemysl (referee) ; Malášek, Jiří (advisor)
The aim of this bachelor´s thesis is to create 3D models of stress tensor. Mohr´s circles serve as a base for identification of size and direction of stress component. These are then used for the 3D modelling in software Rhinoceros. Final models in the form of colored areas show general, normal and shear stress for the individual states of stress.
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