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Dissertations / Theses on the topic 'V-BENDING'

Author: Grafiati

Published: 16 January 2024

Last updated: 25 July 2025

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1

Sarikaya, Onur Turgay. "Analysis Of Heat Treatment Effect On Springback In V-bending." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12610182/index.pdf.

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Aluminum based alloys have wide area of usage in automotive and defense industry and bending processes are frequently applied during production. One of the most important design criteria of bending processes is springback, which can be basically defined as elastic recovery of the part during unloading. To overcome this problem, heat treatment is generally applied to the workpiece material to refine tensile properties. In this study, the effect of heat treatment on springback characteristics of aluminum studied both numerically by using finite element analysis and experimentally. For this purp

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2

Loth, Sebastian. "Atomic scale images of acceptors in III-V semiconductors band bending, tunneling paths and wave functions /." Göttingen : Univ.-Verl. Göttingen, 2008. http://d-nb.info/989995232/34.

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Loth, Sebastian [Verfasser]. "Atomic scale images of acceptors in III-V semiconductors : band bending, tunneling paths and wave functions / Sebastian Loth." Göttingen : Univ.-Verl. Göttingen, 2008. http://d-nb.info/989995232/34.

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Wasserbauer, Jaromír. "Lokální zkoušky mechanických vlastností materiálů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2009. http://www.nusl.cz/ntk/nusl-216510.

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This thesis deals with measurement of hardness and microhardness in relation to structure of homogeneous and heterogeneous materials. In the introduction basic theoretical background is commented, i.e. definitions, terminology, principles of measuring techniques for estimation of hardness, microhardness, tensile strength, compressive strength and bending strength. Follows a brief review of present research results focused on use of described principles in materials engineering. Then the experimental equipment and sample preparation is described. The crucial part of the thesis is summary of ach

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Myšičková, Lucie. "Vývoj a zkoušení vysokohodnotných betonů pro subtilní konstrukce." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226971.

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Thesis describes properties of HPC compared to concretes of normal and high strength. It further describes the input materials and the procedure for designing the composition of the mixture. It gives examples of already completed structures made of HPC. The experimental part describes the optimization of concrete mix and production of specimens. In the end results of testing the properties of the developed mixes from tests of dynamic and static modulus of elasticity, compressive strength and tensile strength by bending are described.

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Gottwaldová, Aneta. "Studium vlastností cementových kompozitů s rozptýlenou výztuží z anorganických vláken." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392335.

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Diploma thesis deals with study of properties of cementious composites with fiber reinforcement from glass and basalt inorganic fibers. Diploma thesis includes a theoretical and experimental part. The theoretical part deals with information about glass and basalt fibers, their durability and usage. In the experimental part we monitored properfies of cement composites with basalt and glass fibers. Fibers were exposed to an aggressive environment. The properties of composites with reference fibers were compared with composites with fibers affacted by the aggressive environment. The properties of

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Fójcik, Tomáš. "Vliv triaxiální deformace kameniva na vlastnosti betonu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2009. http://www.nusl.cz/ntk/nusl-216555.

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This diploma work takes focus in elastic modulus of unbound granular aggregates, which was determined by repeat load triaxial test and in deformation behaviour of unbound granular aggregates - elastic and plastic deformation. It was examine the propriety of this aggregate for its service as underlying granular material in pavement. Further, there was observed the influence of elastic modulus of unbound granular aggregates on concrete characteristics - compressive and bending strength. Finally, it was observed the influence of individual fractions of aggregates on its elastic modulus and streng

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Vrtal, Roman. "Diagnostika poruch a vad podlah v bytové a občanské výstavbě." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-227022.

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The object of the thesis is a description of preparation process, realization and subsequent treatment of floors based on calcium sulphate, including problems related to the issue. The aim of the work is to closely acquaint the reader with methods used in diagnostics of flooring failures and defects in the housing and civic construction, including practical applications of these methods on real structures. The work also includes experimental analysis of a real floor construction during local load effect.

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Šafář, Martin. "Vliv povlakování na lomové chování ledeburitické oceli." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229293.

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This work deals with tool steel Vanadis 6. It describes the preparation of samples for the three-point bending test, with which it examines the influence of surface roughness, the effect of nitriding, coating and duplex coatings on fracture behaviour of the steel. First, it examines bending strength and the total energy required to work of fracture. The work also includes mapping and measurement of surface roughness on different layers. This measurement is performed on a confocal microscope.

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Dvořák, Richard. "Studium efektu aplikace celulózových vláken v cementových kompozitech." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240420.

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This diploma thesis is focused on composition and processing of cellulose fibers and their usage in cementitious composites. It describes key attributes of cellulose fibers, which has to be acquired for effective use in cement composites. There are stated effects of cellulose fibers on concrete properties, such as workability, physical and mechanic attributes and freeze-thaw resistance. In experimental part is designed a mixture with portion of cellulose fibers. There has been performed various tests to define the effect of cellulose fibers. There was designed experiment to determine its alkal

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Grebeň, Petr. "Výpočet průhybu součástí při obrábění." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228344.

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Selected chapters of the science branch "Elasticity and strength" applied to manufacturing of thin parts with various solution approaches. Applying theory of bars and a non-linear differential equation for the deflection line of the second order to a machined shaft. Numerical calculation in the ANSYS program. Evaluation and design of solution variants to machine thin shaft parts without supporting them.

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Hlaváček, Jaroslav. "Příměsi ovlivňující tuhnutí portlandského cementu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216898.

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During the production of concrete is important the careful selection of raw materials. Nowadays, we are trying in the production to minimize the economic burden and to maximize the use of secondary raw materials. This work is focused on the use of secondary raw materials from the energy industry in construction for the preparation of hydraulic binders. As the main raw materials were used different power plant fly ash from fluidized combustion. The composition of these secondary materials is quite different from conventional high-temperature ash, due to mixing with water they solidify and harde

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Panenková, Monika. "Reaktivní práškové kompozity a cementové kompozity bez makropórů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372126.

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This diploma thesis deals with the design principles and manifacture of ultra performance concrete (UHPC), reactive powder composites (RPC) and other fine-grained materials, such as Macro defect free (MDF) or Densified systems with small particles (DSP). Theoretical part of this work is focused on the requirements of properties and composition UHPC and RPC and methodology of their design principles. Experimental part describes design principles RPC, manufacture of test specimens, testing of certain physical and mechanical properties, such as tensile strenght, bending strenght and compressive s

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Březina, Matěj. "Příprava a charakterizace porézních materiálů na bázi hořčíku." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-390297.

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Bulk magnesium materials produced nowadays via powder metallurgy are based on a vastly extensive technological spectrum, which makes it possible to create a wide range of materials. This work focuses on the preparation of bulk materials from magnesium powder by cold pressing and hot pressing, sintering and field assisted sintering. The bulk materials were prepared in a series of compacting pressures from 100 MPa to 500 MPa and the sintering temperatures were selected in the range of 300 ° C to 600 ° C in order to characterize the influence of the manufacturing conditions and technology on the

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Plochý, Ondřej. "Vývoj sklobetonů s vysokými mechanickými vlastnostmi." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371943.

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This master thesis summarizes the current knowledge regarding the design and properties of glass fiber reinforced concrete products. It also deals with the design of a new concrete recipe for Dako spol. s.r.o company. There is verified effect of changes in input materials in real conditions the company to increase tensile bending strength above 20 MPa.In particular, verification of the use of building chemistry like superplasticizing additives, polymer-cement matrix or a change type or dose of glass fiber.

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Coufalík, Pavel. "Návrh a posouzení směsi pro asfaltové vrstvy se zvýšenou odolností proti šíření trhlin (SAL)." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226447.

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This master's thesis deals with the possibility of special asphalt-rubber mixture using - Stress Absorbing Layer (SAL). In the theoretical part the SAL and test methods are described. In the practical part, several different mixtures are designed and selected mixtures were tested. Low-temperature characteristics, permanent deformations, bending tensile relaxation, stiffness modulus and fatigue properties were determined. Based on the test results the mixtures were compared and their benefit is evaluated according to Performance Pavement Design Method, the pavement structure was evaluated by us

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Piterka, Miloslav. "Studium deformace kruhových otvorů v závislosti na jejich odstupu od ohybu při dvoubodovém ohýbání na ohraňovacím lisu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382123.

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The thesis is focused on studying deformation of the circular holes in the limit bending space, depending on the material type, distance from bend, the thickness of material and diameter of hole. After analyzing all necessary technological parameters was bending technology on press brake selected. An experiment for which the tools and press brake Trumpf TruBend 5170 were selected was designed and performed. Samples for the study were designed, bent and measured. The charts have been prepared for practical use in the company from measuring. In addition, simulations were processed in Ansys progr

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Havlíková, Ivana. "Vyhodnocení lomových testů těles z vybraných stavebních materiálů pomocí modelu Dvojí-K." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-355611.

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The purpose of dissertation is the analysis of the calculation of fracture parameters using Double-K fracture model for quasi-brittle specimens with the stress concentrator loaded by three-point bending or wedge splitting. To calculation of these parameters was used the developed DKFM_BUT software in Microsoft Excel application with using of Visual Basic programming language. Furthermore, the adequate shape functions and compliance functions were introduced for the selected wedge splitting test configurations. Main part of this dissertation is the series of comprehensively implemented and eval

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Viszlay, Viliam. "Ohýbaná tělesa: Numerická podpora v software ANSYS." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240183.

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The aim of the thesis is the investigation of fracture-mechanics parameters on specimens made of quasi-brittle materials. The principles of two-parameter fracture mechanics are used. Couple of numerical simulations were done and their outputs are used for two main analysed specimen geometries. For simulations the finite element method software ANSYS is used. In the first part, the thesis focuses on bended specimens. The influence of different geometric parameters on fracture mechanics behaviour of cracked specimen is investigated. For model calibration the outputs of other authors are used. In

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Lidmila, Ladislav. "Rekonstrukce mostu v Ledči nad Sázavou." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409797.

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Diploma thesis deals with reconstruction of old beam bridge in town Ledeč nad Sázavou. Three variants of reconsttruction were done. Detailed structural design report was done to one of them, streithening with post-tensioning. Calculation of load effect was solved with finite elemet method via software on grillage model. Construction was checked on ultimate limit state and serviceability limit state. Necessary drawings were elaborated to chosen method.

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Kulich, Pavel. "Dynamická analýza koleje." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265372.

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The diploma thesis deals with analytical description of vehicle - track dynamic interface. There are described basic analytical models which are subsequently extended in order to get a more precise description of dynamic phenomena. The aim is to compile a model that faithfully describes the dynamic phenomena in the track. These new compiled models are qualitatively compared with data obtained by measuring in the track.

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Kukla, Radim. "Statické řešení dostavby nemocnice v Písku." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265241.

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In this diploma thesis „Static solution of hospital completion in Pisek“ I study statical solution of one new building of hospital. Statical solution includes the design and dimensioning of reinforced concrete floor structures and peripheral beams. The floor structure consists of point supported reinforced concrete slab. The floor slab is supported by columns and walls. The aim of the project is to desing and evaluate the ultimate limit state of reinforced concrete slab and beams. Also was created 3D computational model to analysis the construction, model was created in software Scia Engineer.

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Vyhlídal, Michal. "Porušování vybraných stavebních kompozitů v blízkosti rozhraní plniva a matrice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372021.

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The interface between aggregate grains and matrix in cementitious composites is their weakest element. The topic is particularly significant in the case of high performance and high strength concrete technology for which the eliminination or reduction of these weak links are necessary. The aim of this thesis is to determine the influence of the interface on the fracture behaviour of the cementitious composites. The fracture experiments were performed for this purpose and were complemented by the nanoindentation’s results and scanning electron microscopy results. Numerical model was created in

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Hájek, Jan. "Projekt podzemních garáží v Brně." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225505.

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The goal of the project is behaviour and dimensioning of selected monolithic concrete structure elements. Design and assessment of the building foundation was made. Slabs of the floors are dimensioned in detail. All computations are made in accordance with Eurocode 2. Drawing documentation is part of this project.

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Bejček, Michal. "Vyhodnocení lomově-mechanických parametrů betonu po vystavení vysokým teplotám." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371838.

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The diploma thesis is focused on the evaluation of mechanical fracture parameters of concrete after exposure to high temperatures. In the introductory theoretical part general principles of fracture mechanics with the concentration on a linear elastic fracture mechanics and non-linear fracture models for the concrete are summarized. The meaning of the three-point bending fracture test used for determination of fracture parameters is also explained. Further the influence of high temperatures on the partial components of concrete and general modeling of temperature loading is described. The prac

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Vlk, Radomír. "Návrh asfaltových směsí typu SAL určených pro opravu cementobetonových krytů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227301.

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This master's thesis describes how to use the asphalt layer called Stress Absorbing Layer (SAL) and comparises it with other types of SAL with different types of asphalt binders. In the first theoretical part is SAL generally described. In the second part is SAL practically tested and described.

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Benjamin, Anne Laura. "Scanning Tunneling Microscopy Studies of Defects in Semiconductors: Inter-Defect and Host Interactions of Zn, Er, Mn, V, and Co Single-Atom Defects in GaAs(110)." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu15254254578788.

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Mojžíšek, Dominik. "Dynamická analýza koleje." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372123.

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The diploma thesis deals with descriptions of vehicle - track dynamic interface. There are described basic analytical models of railway track. The numerical models are created by using finite element methods with moving load simulated axle of rail vehicle. The aim of thesis is to create the model which most accurately describes the dynamic phenomena in the track. The results from models are compared with data obtained by measuring in the track. Next aim of thesis is to determine dependency of rail cross-sectional characteristics on equivalent rail head wear and then on rail deflection.

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Matušíková, Anna. "Navrhování konstrukcí s FRP výztuží." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225478.

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This diploma thesis presents available FRP software for calculating load bearing capacity of the structures reinforced with FRP and compares them between each other. Furthermore theory and algorithm of my own software is presented here. Load bearing capacity of structures which are reinforced with non-metallic reinforcement and loaded by combination of normal force and bending moment can be solved by my programme. Effects of high temperatures on the concrete structures can be included in the calculation. In the second part of the thesis is calculated load-bearing capacity and deflection of the

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Král, Petr. "Verifikace nelineárních materiálových modelů betonu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227601.

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Diploma thesis is focused on the description of the parameters of nonlinear material models of concrete, which are implemented in a computational system LS-DYNA, interacting with performance of nonlinear test calculations in system LS-DYNA on selected problems, which are formed mainly by simulations of tests of mechanical and physical properties of concrete in uniaxial compressive and tensile on cylinders with applying different boundary conditions and by simulation of bending slab, with subsequent comparison of some results of test calculations with results of the experiment. The thesis inclu

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Huang, Yuung Ming, and 黃永明. "Analysis of V-shape Bending Process Using Various Finite Element." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/69823322537968875153.

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碩士<br>國立臺灣科技大學<br>工程技術研究所<br>81<br>The finite element scheme for the constant strain triangu- lar element，the four node and nine node quadrilateral element has been proposed in this paper to solve the condition of the plane strain of the V-shape sheet bending process．As for the analytic result of the constant strain triangular (3-CST) ele- ment and the full integration for the nine node quadrilateral (9-FI) element schemes will lead to the stress is high in the bend part of the forming proc

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Gautam, Vijay. "Investigations on springback in v-bending of tailor welded blanks." Thesis, 2016. http://localhost:8080/iit/handle/2074/7200.

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Chen, Tsung-Chia, and 陳聰嘉. "Study on V-Bending Process of Camber Behavior of Sheet Metal." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/22730108485442049755.

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博士<br>國立臺灣科技大學<br>機械工程系<br>92<br>This study aims to clarify the process conditions of the V-die bending of a steel sheet metal. It provides a model that predicts not only the correct punch load for bending, but also the precise final shape of products after unloading, based on the tensile properties of the material and the geometry of the tools used. A methodology for formulating an elasto-plastic three-dimensional finite element model, which is based on Prandl-Reuss flow rule and Hill’s yield criterion respectively, associated with an updated Lagrangian formulation, is developed to simulate s

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Kim, Suenne. "I-V transport measurements of a single unsupported MWCNT under various bending deformations." 2008. http://hdl.handle.net/2152/9706.

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The first part of this dissertation is an introduction describing a brief historical background of carbon nanotubes (CNTs) and their pseudo 1D structure responsible for many exotic electronic properties. The second part describes our experimental setup. The third part is about the growing of Multi-Walled Carbon Nanotubes (MWCNTs) by the chemical vapor deposition (CVD) method. Then the fourth part demonstrates a simple but reliable method to make firm contact junctions between MWCNTs and metals such as tungsten (W). The novel point of our method consists, after making a mechanical preliminary c

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HSI, SUNG CHIANG, and 宋清溪. "The effect of opening size on the camber of V-shaped bending process." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/50680179041330832461.

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碩士<br>國立勤益科技大學<br>機械工程系<br>103<br>This paper aims to investigate the effect of opening size for the camber of V-die bending of a sheet metal of steel and the effect of the V-die bending forming process according to different hole size (diameter 4,6,8,10mm) aiming at the hot rolled mild steel plate (SPHC) material. Through the simulation analysis of material parameter obtained from the tensile test to understand the camber height differences when forming different dimension of the opening in a V-die finite element program. This article is a combination of finite element method and finite elem

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Hung, Yi Hsiang, and 洪逸翔. "A Study On The Micro-Forming Of V-Bending Process Of Metallic Thin Sheet." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/33372087506532719149.

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碩士<br>北臺灣科學技術學院<br>機電整合研究所<br>99<br>The capability of predicting the sheet metal part final geometry as well as springback amount is an important feature in the sheet metal bending processes. The occurrence of grain size effect make the application of a traditional process design methodology difficult. Therefore, the design of micro-forming operations is still largely performed through empirical techniques. While the design work is made by way of tools and processes, for effectively compensating and eliminating the springback, to understand the influence of grain size effects on springback is

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Shie, Rie Fong, and 徐日豐. "Endochronic simulation of V iscoplastic,Creep and relaxation for Thin-Walled Tube under Pure Bending." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/98355314002784312879.

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Hsu, Hau-Chi, and 徐豪志. "Study on Shape Memory Effect in Thermomechanical V-Bending of Ni-Ti Shape Memory Alloy Wire." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/17659432966834692149.

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碩士<br>國立中興大學<br>機械工程學系所<br>101<br>The aim of this study is that shape memory treatment and V-bending process for nickel-titanium alloy wire are able to be accomplished within one thermomechanical process at high temperature. This method could provide an alternative choice for the nickel-titanium shape memory alloy wire to reduce the spring-back in V-bending process due to the creep effect. In this study, the influences of forming temperatures and process time on spring-back were studied. Furthermore, experiment was carried out to verify with the finite element analysis results. The material mo

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Chiu, Chun-chin, and 邱俊欽. "Experimental design and performance analysis of the V-die bending process using the Response Surface Methodology." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/75995066716128875683.

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碩士<br>修平技術學院<br>精密機械與製造科技研究所<br>98<br>In this study, an effective procedure of response surface methodology (RSM) was utilized for experimental design and performance analysis of the V-die bending process. The punch radius, die width, die corner radius and blank thickness were selected as effective processing parameters to investigate the influences on the performance of spring-back angle and thickness variation in the bending process. A standard RSM design called the centered composite rotatable design (CCRD) was applied in this experimental plan. Based on the analysis of variance and verific

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KUMAR, SHARMA PANKAJ. "EXPERIMENTAL AND NUMERICAL STUDIES ON SPRINGBACK OF 2-PLY AND 3-PLY LAMINATE COMPOSITES OF ALUMINIUM AND STAINLESS STEEL." Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/20390.

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To meet the requirement of materials having higher tensile strength to weight ratio along with corrosion resistance, the 2-ply and 3-ply clad sheets of aluminium and stainless steel are being utilized in domestic applications, manufacturing of automotive sheet metal parts, shipbuilding, and other industries. Metal clad sheet composites are a different kind of composite material where alternating metal layers are bonded together with inter-metallic bond. The sheet metal components manufactured by forming processes may undergo some geometrical changes due to the phenomenon of sprin

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Loth, Sebastian [Verfasser]. "Atomic scale images of acceptors in III-V semiconductors : band bending, tunneling paths and wave functions / vorgelegt von Sebastian Loth." 2007. http://d-nb.info/996181148/34.

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