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Effect of fiber direction around the hole in longfiber composite on the stress distribution
Tulis, Vojtěch ; Majer, Zdeněk (referee) ; Polzer, Stanislav (advisor)
The bachelor thesis focuses on stress distribution of longfiber composite with a hole, mainly on the influence of fiber direction on the stress distribution around such a hole. To look into the problem closely some samples of common longfiber composites have been simulated in the software environment of Ansys. These samples were analyzed on the final stress distribution – first without any change of the direction of fibers and then with different models of control. Subsequently, all the data were processed and assessed.
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Influence of production stresses on the safety of cylindric pressure vessels
Krakovský, Andrej ; Profant, Tomáš (referee) ; Burša, Jiří (advisor)
The bachelor thesis deals with influence of production stresses on the safety of cylindrical pressure vessels. Pressure vessels are made by sheet rolling. In this process the yield strength is exceeded, which leads to creating residual stresses. These stresses can influence final safety of vessels, if any heat treating isn’t done. In this thesis residual stresses are analytically calculated for cylindrical pressure vessel of wagon tank and for theoretical thick-walled vessel. After that safety with and without residual stresses are compared. The last part of this thesis describes method of removing these stresses.
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Stress strain analysis of a synchronous generator
Majdič, Petr ; Donát, Martin (referee) ; Dušek, Daniel (advisor)
This master thesis deals with an impact of particular static and dynamic forces and temperature strain on horizontal synchronous generator. In connection with this, a stress distribution in construction and an assessment of security to terminal state of flexibility and weariness is being solved together with finding the most critical places on horizontal synchronous generator.
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Influence of production stresses on the safety of cylindric pressure vessels
Krakovský, Andrej ; Profant, Tomáš (referee) ; Burša, Jiří (advisor)
The bachelor thesis deals with influence of production stresses on the safety of cylindrical pressure vessels. Pressure vessels are made by sheet rolling. In this process the yield strength is exceeded, which leads to creating residual stresses. These stresses can influence final safety of vessels, if any heat treating isn’t done. In this thesis residual stresses are analytically calculated for cylindrical pressure vessel of wagon tank and for theoretical thick-walled vessel. After that safety with and without residual stresses are compared. The last part of this thesis describes method of removing these stresses.
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Effect of fiber direction around the hole in longfiber composite on the stress distribution
Tulis, Vojtěch ; Majer, Zdeněk (referee) ; Polzer, Stanislav (advisor)
The bachelor thesis focuses on stress distribution of longfiber composite with a hole, mainly on the influence of fiber direction on the stress distribution around such a hole. To look into the problem closely some samples of common longfiber composites have been simulated in the software environment of Ansys. These samples were analyzed on the final stress distribution – first without any change of the direction of fibers and then with different models of control. Subsequently, all the data were processed and assessed.
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Stress strain analysis of a synchronous generator
Majdič, Petr ; Donát, Martin (referee) ; Dušek, Daniel (advisor)
This master thesis deals with an impact of particular static and dynamic forces and temperature strain on horizontal synchronous generator. In connection with this, a stress distribution in construction and an assessment of security to terminal state of flexibility and weariness is being solved together with finding the most critical places on horizontal synchronous generator.
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Analýza rozdělení napětí pro trhlinu s vrcholem na rozhraní dvou materiálů
Náhlík, Luboš
The problem of arbitrarily oriented crack terminating at the boundary of two bonded materials is studied from the point of view of linear elastic fracture mechanics. The nature of the stress singularity for the crack terminating at the interface is different from 1/ square root of r and thus current fracture mechanics criteria cannot be adopted. The values of stress singularity exponent for selected ratio of elasticity modulus of both applied materials in dependency on orientation of crack and interface are calculated.
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