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Stress-strain analysis of crane truss loaded by a force with varying position
Cabaj, Gabriel ; Fuis, Vladimír (referee) ; Vaverka, Jiří (advisor)
The bachelor thesis deals with the stress-strain analysis of the truss of a gantry crane. The theoretical part clarifies the basic concepts of statics, elasticity and strength. The concept of influence lines and its use for solving stress-strain analyses of structures with variable position of the loading force is further presented. The practical part deals with a model 2D example, specifically, the design of a cross section for a simplified model of a gantry crane, which is represented by the truss structure. The results for trusses with different degrees of static indeterminacy are compared. Subsequently, the analytical results are verified by the numerical solution in ANSYS software. In the last analysis, a 3D model of a gantry crane with realistic parameters from available sources is created. Finally, the stress-strain analysis of the gantry crane is performed considering the variable position of the loading force.
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Stress-strain analysis of artery with atheroma
Maša, Marek ; Návrat, Tomáš (referee) ; Burša, Jiří (advisor)
The main goal of this diploma thesis was the stress-strain analysis of iliac artery with atheroma.This problem was solved using finite element method (FEM).For the calculation purposes three two-dimensional models were created. The geometry was gained from transversal sections through the iliac artery with ateroma. This geometry is educed from used literature review. The main calculation process was run by ANSYS 11.0 program system.
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Conceptual design of light folding hot-air balloon basket
Zatloukal, Tomáš ; Löffelmann, František (referee) ; Šplíchal, Jan (advisor)
The master thesis examines the design of small folding hot-air balloon basket intended for up to 3 people. It mainly focuses on the conceptual and structural design and their stress-strain analyses. After an initial introduction to the general terms used in hot-air ballooning, the thesis is focused on collecting information about folding lightweight baskets produces nowadays. The part deals with the conceptual design of the basket begins with the requirements. After choosing the method of basket folding, the thesis focuses on the structural nodes of the basket, and it also talks about the design of the burner frame. The penultimate part of the thesis verifies the selected structural designs from a strength point of view. The conclusion is devoted to the mass analysis.
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Stress-Strain Analysis of Shotgun Barells
Běhal, Josef ; Majer, Zdeněk (referee) ; Slažanský, Martin (advisor)
This bachelor’s thesis deals with stress-strain analysis of the shotgun barells. Gun was designed by company Česká zbrojovka a.s. Thesis contains an introduction to the functionality of weapons folowed by chapter dealing with shot from small shot shotgun. Stress-strain analysis was performed by finite element method. The final section shows the evaluation of achieved results.
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Computational modelling of stresses in intracranial aneurysms
Turčanová, Michaela ; Polzer, Stanislav (referee) ; Burša, Jiří (advisor)
The diploma thesis deals with the assessment of the prediction of brain aneurysm rupture based on its geometrical and material properties. In the first part of the thesis there is a~detailed research study of cardiovascular systems with a focus on the cerebral artery and aneurysm occurring on their bifurcates. The second part of the thesis is focused on the creation of two models of arterial cerebral bifurcation with the presence of aneurysm and on obtaining their geometry in unloaded state. Emphasis is placed on the most realistic constitutive model of the artery wall material based on real data from uniaxial tensile tests and on a suitably chosen blood pressure load. This blood pressure may be step-changed, for example, in bungee jumping. In the work, a calculation of the increase in blood pressure during the step-change is performed, which is subsequently used in calculations of tension in the wall of the cerebral aneurysm. In conclusion, the risk of rupture is evaluated in two model idealized brain aneurysms and a discussion of the credibility of the results is given.
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Biomechanical research study of skull plates and implants
Vystrk, Tomáš ; Valášek, Jiří (referee) ; Marcián, Petr (advisor)
Cranial implants along with fixators are used to restore the function of the damaged area of the human skull, where due to disease or injury the defect was created. When assessing the suitability of the implant and fixators the mechanical properties are significant. With this the material and shape of implant and fixators are related. The implant must be suitable with human bone tissue and also be able to withstand long-term loading. This paper summarizes the present knowledge regarding the design, manufacture and application of cranial implants. Next the stress-strain analysis of the loaded scull with irregular shaped defect, placed implant and fixation system is provided.
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Stress-strain analysis of aortic aneurysms
Man, Vojtěch ; Janíček, Přemysl (referee) ; Burša, Jiří (advisor)
This master thesis is focused on stress-strain analysis abdominal aortic aneurysm using ANSYS software. The model of abdominal aortic aneurysm are based on CT scans of five specific patients. The branching arteries are included to the model and one goal of this thesis is decision about their influence of the wall stress. In this thesis was used a hyperelastic materiál model, which is based on mechanical tests done on human arterial samples.
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Design of Device for Vehicle Center of Gravity Height Measurement
Rektořík, Jiří ; Vančura, Jan (referee) ; Hejtmánek, Petr (advisor)
The objective of this diploma thesis is the design of a device that measures the vehicle’s centre of gravity height position. The first part defines individual methods of measurement using various measuring equipment. The next part deals with the definition of requirements for the device and the definition of the design. A stress-strain analysis was executed for selected components. This diploma thesis describes the preparation process of the vehicle and the device for the measurement. The next part is dedicated to the design of the measuring chain and to the evaluation of the results. The thesis concludes with a theoretic analysis of the measurement inaccuracy.
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Biomechanical studies carpometacarpal (CMC) joint thumb
Podsedník, Karel ; Marcián, Petr (referee) ; Florian, Zdeněk (advisor)
This master thesis deals with stress-strain analysis of carpometacarpal (CMC) thumb joint. It is a preliminary study, which was not analysed on BUT Mechanical and biomechanical institute yet. There is a comparative stress-strain analysis of CMC with applied total endoprosthesis and physiological condition. The model of geometry was created based on CT images and processed with using software Catia and Solidworks. The problem was solved in numerical FEM (finite element method) in software Ansys 13.0
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