Thematische Bibliographien / Spallings / Dissertationen
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Dissertationen zum Thema „Spallings“

Autor: Grafiati
Veröffentlicht am 25. Juni 2021
Zuletzt aktualisiert am 29. Juli 2025

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1

Darth, Pontus. "Simulation of Rolling Mill to Computeand Improve Load Distribution." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-85595.

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This master thesis was done at Swerim AB in cooperation with SSAB and the Technical University of Luleå in the purpose of preventing spalling problems in hot rolling mills. Spallings are a fatigue damage that occurs on the rolls due to extreme loads and unfavorable conditions between the rolls in a mill. This report describes how the roughing mill, which is the first of a series of hot rolling mills is modelled and simulated in order to compute and improve the load distribution between the rolls. The load distribution tells a lot where the spalling problems occurs. By computer aided design and
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2

MOTTA, BERNARDO HEISLER. "THE CONTEMPORARY NARRATIVE AND INTERACTIVE DIGITAL TECHNOLOGIES: SPALLING, DECENTRALIZATION, SLIDING AND MULTIPLICATION OF CHARACTERS` SPALLING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7661@1.

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FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO<br>Essa pesquisa tem como objetivo analisar a descentralização, fragmentação, deslizamento e multiplicação da identidade dos personagens na ficção literária e cinematográfica contemporânea. A hipótese que norteia o trabalho é a de que estas transformações, na forma em que vêm se apresentando, estão intimamente relacionadas a um outro fenômeno, decorrente das possibilidades criadas pelas novas tecnologias digitais, o da interatividade. Assim, a pesquisa debruça-se sobre a inter-relação entre as narrativas de ficção digitais e as na
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3

Connolly, Raymond J. "The spalling of concrete in fires." Thesis, Aston University, 1995. http://publications.aston.ac.uk/14310/.

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The occurrence of spalling is a major factor in determining the fire resistance of concrete constructions. The apparently random occurrence of spalling has limited the development and application of fire resistance modelling for concrete structures. This Thesis describes an experimental investigation into the spalling of concrete on exposure to elevated temperatures. It has been shown that spalling may be categorised into four distinct types, aggregate spalling, corner spalling, surface spalling and explosive spalling. Aggregate spalling has been found to be a form of shear failure of aggregat
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4

Jansson, Robert. "Fire Spalling of Concrete : Theoretical and Experimental Studies." Doctoral thesis, KTH, Betongbyggnad, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-128378.

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Fire spalling of concrete is not a new phenomenon. To some degree there has always been a risk during rapid heating of concrete. Therefore, to a certain degree the effect of fire spalling is included in the bank of data from fire tests and fires on which our understanding of the fire resistance of concrete is based. However, the development and modern use of more dense concrete mixes have produced cases of very severe fire spalling which have increased the urgency to understand this phenomenon. In this context, the use of an addition of polypropylene (PP) fibres to the mix to limit the amount
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5

Nguyen, Thang Dinh. "Theoretical study of thermal spalling of brittle materials." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/77905.

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In this work several problems related to thermal spalling are considered. First, a novel approximate technique to solve general linear heat-conduction problems with changing boundary conditions and locations is proposed. The technique is based on the concept of linear superposition and the possibility to transform the initial condition into a time-varying boundary condition. The proposed technique is evaluated and compared_to some of the existing techniques. The individual contribution of several stress components and their combined effects on the risk of failure are then considered for a theo
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Jansson, Robert. "Material properties related to fire spalling of concrete /." Lund : Division of Building Materials, Lund Institute of Technology, Lund University, 2008. http://www.byggnadsmaterial.lth.se/.

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7

Jerabek, Jakub, Allessandra Keil, Jens Schoene, Rostislav Chudoba, Josef Hegger, and Michael Raupach. "Experimental and Numerical Analysis of Spalling Effect in TRC Specimens." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244046893347-05461.

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The paper presents the study of spalling effect occurring under tensile loading in thin-walled TRC specimens. The experimentally observed failure patterns are first classified and the performed experiment design is explained and discussed. A parameter study of spalling effect with varied thickness of concrete cover and reinforcement configurations including both the textile fabrics and the yarns provided the basis for numerical analysis of the effect. The applied numerical model was designed in order to capture the initiation and propagation of longitudinal cracks leading to the separation of
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8

Thiruchelvam, Chellathurai. "Deterioration and spalling of high strength concrete at elevated temperatures." Thesis, City University London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274476.

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9

Lopes, Christian Raposo. "Spalling e DoP em alvos metálicos : estudos analíticos e numéricos." Master's thesis, Universidade de Aveiro, 2009. http://hdl.handle.net/10773/2493.

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Mestrado em Engenharia Mecânica<br>As constantes formas de ameaça requerem o desenvolvimento constante de mecanismos de protecção, capazes de suster ataques de diversos tipos. Estes mecanismos devem possuir qualificações de segurança elevadas, visando a protecção de pessoas, veículos ou infraestruturas. O desenvolvimento tecnológico de sistemas de protecção inovadores permite acompanhar a evolução do tipo, tecnologia e performance das ameaças (armas, projécteis, explosivos, etc.). Consequentemente, é de grande importância o desenvolvimento de meios capazes de avaliar a capacidade de absorção d
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Yanko, William Andrew. "Experimental and numerical evaluation of concrete spalling during extreme thermal loading." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0006380.

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11

Khoylou, Naysan. "Modelling of moisture migration and spalling behaviour in non-uniformly heated concrete." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/7317.

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12

Medlej, Adel. "Experimental investigation of corrosion-induced cracking, spalling and delamination of bridge decks." Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27712.

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Corrosion of the steel rebar is one of the major deterioration mechanisms of reinforced concrete structures. The build-up of corrosion products around the reinforcing steel induces tensile stresses in the surrounding concrete, leading to cracking of the concrete cover when its tensile resistance is exceeded. Corrosion-induced failure mechanisms of the concrete cover that have been observed in the field are longitudinal cracking (parallel to the direction of reinforcement), spalling and delamination. Previous research efforts have lead to the development of analytical and finite element models
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13

Luo, Yang. "Dynamic Modelling and Fault Feature Analysis of Gear Tooth Pitting and Spalling." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/38834.

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Fault feature analysis of gear tooth spall plays a vital role in gear fault diagnosis. Knowing the characteristic of fault features and their evolution as a gear tooth fault progresses is key to fault severity assessment. This thesis provides a comprehensive (both theoretical and experimental) analysis of the fault vibration features of a gear transmission with progressive localized gear tooth pitting and spalling. A dynamic model of a one-stage spur gear transmission is proposed to analyze the vibration behavior of a gear transmission with tooth fault. The proposed dynamic model considers the
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Khalid, Nibras Nizar. "STRENGTH REDUCTION OF REINFORCED CONCRETE COLUMNS SUBJECTED TO CORROSION RELATED COVER SPALLING." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron152536559529405.

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15

SUZUKI, Kenji, Keisuke TANAKA, and Yoshiaki AKINIWA. "Estimation of Spalling Stress in Thermal Barrier Coatings Using Hard Synchrotron X-Rays." The Japan Society of Mechanical Engineers, 2004. http://hdl.handle.net/2237/9176.

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16

Wang, Xiaofeng. "Simulation models for rolling bearing vibration generation and fault detection via neural networks." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362159.

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17

Santos, Mario Cesar Borba. "O método da extensão virtual da trinca na fadiga por contato do tipo "spalling"." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2004. http://hdl.handle.net/10183/6766.

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O estudo dos mecanismos de fadiga por contato tem grande relevância para o estudo dos componentes mecânicos que estão sujeitos ao desgaste. O desgaste é um tipo de falha que ocorre na maioria dos componentes que trabalham em contato. Atualmente para prever o desgaste são utilizados métodos experimentais que permitem ajustar curvas semi-empíricas, ou seja, o resultado depende de vários testes que além de caros são demorados. Com o aumento da competitividade na indústria, o tempo se tornou artigo de luxo e com isso o aprimoramento dos modelos de cálculo e das simulações numéricas são muito bem j
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18

Khalaf, Jamal. "Development of non-linear bond stress-slip models for reinforced concrete structures in fire." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/14863.

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Exposure of concrete structures to high temperatures leads to significant losses in mechanical and physical properties of concrete and steel reinforcement as well as the bond characteristics between them. Degradation of bond properties in fire may significantly influence the load capacity of concrete structures. Therefore the bond behaviours need to be considered for the structural fire engineering design of reinforced concrete structures. At present, the information about the material degradations of concrete and reinforcing steel bars at elevated temperatures are generally available. However
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19

Ichikawa, Yoshikazu. "Prediction of pore pressures, heat and moisture transfer leading to spalling of concrete during fire." Thesis, Imperial College London, 2000. http://hdl.handle.net/10044/1/8721.

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20

Miah, Md Jihad. "The effect of compressive loading and cement type on the fire spalling behaviour of concrete." Thesis, Pau, 2017. http://www.theses.fr/2017PAUU3015/document.

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La recherche présentée dans cette thèse vise à examiner le mécanisme d’écaillage des bétons exposés au feu et comprendre l’influence du chargement mécanique appliqué en compression durant le chauffage. Des cubes (200 x 200 x 200 mm3) et des dalles (800 x 800 x 100 mm3) de béton fabriqués avec des ciments CEM II et CEM III (B40-II et B40-III: fc28days ≈ 40 MPa) ont été exposés à un feu ISO 834-1 sous différents niveaux de chargement uniaxial (cubes) et biaxial (dalles). En outre, l'effet du chargement mécanique (pression de confinement et charge uniaxiale) sur la perméabilité résiduelle au gaz
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21

Dauti, Dorjan. "A combined experimental and numerical approach to spalling of high-performance concrete due to fire." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAI062/document.

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Le béton est un matériau très utilisé dans l'industrie de construction. Une limite essentielle à un usage de ce matériau est sa dégradation par écaillage lorsqu’il est exposé au feu. Le phénomène d'écaillage consiste en une éjection du béton sous forme d'écailles à la surface du béton exposée à l'incendie. La section de béton s'en trouve progressivement réduite. De plus, ce phénomène expose les armatures et peut conduire à une rupture prématurée de structures telles que les tunnels, les gratte-ciels, les centrales nucléaires etc. De nombreuses recherches ont été consacrées à la mise au point d
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Clayton, Daniel James. "A physiochemical study of the heating of low cement castable refractories and the problem of explosive spalling." Thesis, Keele University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327700.

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Low cement castable (LCC) refractory linings, over recent years, have superseded refractory bricks in many high temperature applications. There are concerns however, pertaining to their dry-out. In particular the catastrophic destruction of LCC shapes or linings as a result of phenomenate rmede xplosives palling. This thesis describes the study of both the on-site treatments of LCCs and the physicochemical changes that occur during heating. Two types of explosive spalling event are classified,b asedo n on-siteo bservationsa ndp ost-mortems tudy. A model is presented that describes the physicoc
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Busba, Ezeddin Rafaa. "Effect of Localized Corrosion of Steel on Chloride-Induced Concrete Cover Cracking in Reinforced Concrete Structures." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4872.

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Abstract: Concrete cover cracking due to reinforcement corrosion is widely accepted as a limit-state indicator in defining the end of functional service life for existing reinforced concrete (RC) structures undergoing corrosion. Many of the currently available durability prediction models are incapable of providing realistic estimates of remaining service lives of RC structures beyond the corrosion initiation point. Therefore, the need to incorporate the length of the corrosion propagation stage in a comprehensive durability prediction approach has recently received much research attention. Pr
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Bosnjak, Josipa [Verfasser], and Joško [Akademischer Betreuer] Ožbolt. "Explosive spalling and permeability of high performance concrete under fire : numerical and experimental investigations / Josipa Bosnjak. Betreuer: Josko Ozbolt." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://d-nb.info/1058362151/34.

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Bošnjak, Josipa [Verfasser], and Joško [Akademischer Betreuer] Ožbolt. "Explosive spalling and permeability of high performance concrete under fire : numerical and experimental investigations / Josipa Bosnjak. Betreuer: Josko Ozbolt." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-95122.

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26

Concetti, Lorenzo. "Verifica di resistenza al fuoco del rivestimento definitivo in c.a. di una galleria ferroviaria." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.

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L’analisi degli incendi con l’impiego del metodo della Fire Safety Engineering sta acquisendo sempre più importanza sia in Italia sia in tutte le nazioni più tecnologicamente avanzate, in quanto negli ultimi anni gli standard di sicurezza in ambito strutturale sono notevolmente aumentati. La verifica di sicurezza delle strutture al fuoco è necessaria quando il rischio di incendio non è trascurabile e i conseguenti danni strutturali possono avere ripercussioni inaccettabili per l’incolumità degli occupanti o delle squadre di soccorso. La verifica delle prestazioni è d’altro canto necessaria (ov
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Kirchhof, Larissa Degliuomini. "Estudo teórico-experimental da influência do teor de umidade no fenômeno de spalling explosivo em concretos expostos a elevadas temperaturas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/32002.

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Os concretos de alta compacidade, com resistências elevadas (acima de 40 MPa), estão começando a ser cada vez mais usados em obras de infraestrutura e em edificações de grande porte, devido às importantes vantagens que os mesmos oferecem em termos de capacidade de carga e durabilidade. Um dos pontos acerca de seu desempenho que levanta dúvidas envolve o seu comportamento frente a elevadas temperaturas. Evidências coletadas em incêndios ocorridos em estruturas reais, como o do Channel Tunnel e do Mont Blanc Tunnel, indicaram que, sob certas circunstâncias, existe a possibilidade de ocorrência d
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Klein, Mark Andrew. "An Experimental Investigation of Materials and Surface Treatments on Gear contact Fatigue Life." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243885964.

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29

Mullins, Sarah K. "The Evaluation on the Effectiveness of Hydrodemolition and Polyaspartic Sealing for Bridge Parapet Wall Protection." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1543920461272325.

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30

BERARDONE, IRENE. "Fracture Mechanics of Silicon: From durability of photovoltaic modules to the production of thin film solar cells." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2651712.

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Nowadays the photovoltaic research is focused on increasing the performances, the durability and reducing the cost of production of solar cells, such as PV modules. These are the paromount fields to make photovoltaics more attractive for the energetic market. In this dissertation two of these aspects are investigated: the durability and the cost reduction issues. The fracture mechanics of the Silicon, the standard material used for the solar cells, is the main subject of the presented study. In the recent and next years the relevance of the durability studies is expected to increase mor
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31

Corcoran, Jeffrey C. "ASSESSING THE STABILITY AND LONG-TERM VIABILITY OF ABANDONED MINES FOR USE BY BATS." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1791850981&sid=6&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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32

Vittal, Srigiripura Sahana. "Development of a method for estimation of contact fatigue life in hypoid gears." Thesis, KTH, Maskinkonstruktion (Inst.), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-288898.

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Hypoid gears have been used extensively in automobiles, aerospace, marine and other applications for decades. The special advantages of hypoid gears come with inherent contact complexities of varying curvature and sliding in both profile and lengthwise direction. Spalling failure is catastrophic and needs to be addressed with deeper roots in gear design. Analytical methods present several limitations. Iterative development from experimentation is expensive and time consuming with different nonlinear parameters difficult to interpret. This thesis aims to develop a method to calculate contact fa
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Zaina, Mazen Said Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Strength and ductility of fibre reinforced high strength concrete columns." Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2005. http://handle.unsw.edu.au/1959.4/22054.

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The main structural objectives in column design are strength and ductility. For higher strength concretes these design objectives are offset by generally poor concrete ductility and early spalling of the concrete cover. When fibres are added to the concrete the post peak characteristics are enhanced, both in tension and in compression. Most of the available experimental data, on fibre reinforced concrete and fibre reinforced high strength concrete columns, suggest that an improvement in both ductility and load carrying capacity due to the inclusion of the fibres. In this thesis the ductility
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Arsava, Kemal Sarp. "Fire Tests Of Cut And Cover Tunnel Roof Segments At Positive Moment Region." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12612898/index.pdf.

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The most important issue during a tunnel fire is safety of human life. The tunnel fire structural research and investigations have gained more importance in the last decade but studies show variable results depending on the concrete quality and tunnel design fire. For instance, a certain type of concrete with high moisture content can tend to explode in the first 10-15 minutes of fire with rapid increase of heat release rate. A sudden collapse of the tunnel roof during the fire is unacceptable. Especially in Netherlands, the possible sagging of cut and cover tunnel roof is undesired and pr
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35

Dahlberg, Johan. "On the asperity point load mechanism for rolling contact fatigue." Doctoral thesis, Stockholm : Hållfasthetslära, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4569.

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36

Boncu, Altan. "Structural Fire Safety Of Standart Circular Railroad Tunnels Under Different Soil Conditions." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12609537/index.pdf.

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In many tunnel designs, reinforced concrete tunnel lining design is selected based on construction requirements rather than design loads. A constant cross-section is typically used along a tunnel even if the design loads change from one location to another, especially for tunnels constructed by tunnel boring machines (TBM). Factor of safety against failure is not constant along the length of tunnel and is typically high at shallow depth regions. Factor of safety during a rare event is usually much less than the ones set for service load states. Rare events such as earthquake, train derailment,
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Mohammadi, Hosinieh Milad. "Behaviour of High Performance Fibre Reinforced Concrete Columns under Axial Loading." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30726.

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When compared to traditional concrete, steel fibre reinforced concrete (SFRC) shows several enhancements in performance, including improved tensile resistance, toughness and ductility. One potential application for SFRC is in columns where the provision of steel fibres can improve performance under axial and lateral loads. The use of SFRC can also allow for partial replacement of transverse reinforcement required by modern seismic codes. To improve workability, self-consolidating concrete (SCC) can be combined with steel fibres, leading to highly workable SFRC suitable for structural applicati
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藤村, 隆志. "鉄道車両用車輪のリム部に発生する損傷の分析とその抑制に寄与する材料および製造プロセスの最適化に関する研究". Kyoto University, 2019. http://hdl.handle.net/2433/244570.

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Xotta, Giovanna. "Mesoscale modelling of concrete as a multiphase material." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3422951.

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In recent years, thanks to upgraded computational resources, concrete has started being modeled as porous medium at 3D meso level, distinguishing in the multiphase system the role of aggregates, cement paste and interfacial transition zone (ITZ). A deep knowledge on the behaviour of concrete materials at the mesoscale level requires, as a fundamental aspect, to characterize aggregates and specifically, their thermal properties if fire hazards (e.g. spalling) are accounted for. The assessment of aggregates performance (and, correspondingly, concrete materials made of aggregates, cement paste an
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Hothan, Sascha, and Daniel Ehlig. "Hochtemperaturverhalten von Stahlbetonplatten mit Textilbetonverstärkung." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-78024.

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Die Verwendung von Endlosfilamenten aus Carbon als Bewehrungsmaterial für Beton, sogenannter Textilbeton, bietet die Möglichkeit der Sanierung und der Verstärkung bestehender Stahlbetonkonstruktionen. Dabei muss die Frage nach dem Feuerwiderstand von derart verstärkten Tragwerken beantwortet werden. Aufschluss darüber liefern Brandversuche. Mit Textilbeton verstärkte Stahlbetonplatten haben in Brandversuchen nach der Einheits- Temperaturzeitkurve bei 33 % der Traglast mehr als 60 Minuten standgehalten. Bei 50 % der Traglast kam es nach einer Branddauer von 55 Minuten, bei 65 % nach 30 Minuten,
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Hannes, Dave. "Modelling of surface initiated rolling contact fatigue crack growth using the asperity point load mechanism." Licentiate thesis, KTH, Hållfasthetslära (Avd.), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-34005.

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42

Bensalem, Hadjira. "Calcul non linéaire des structures en béton : cas particulier du béton soumis au feu." Electronic Thesis or Diss., Université Grenoble Alpes, 2022. https://thares.univ-grenoble-alpes.fr/2022GRALI014.pdf.

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Les incendies graves qui se sont produits ces dernières décennies sur des ouvrages d’art ou d’habitation en béton tels ceux du tunnel sous la Manche (1996) ou du Mont Blanc (1999) ont mis au premier plan de l’actualité la problématique du béton soumis au feu et ses conséquences. Le béton ordinaire est cependant réputé pour sa bonne tenue au feu. Mais l’apparition et l’utilisation de bétons à hautes performances ou à ultra-hautes performances, tout en résolvant des problèmes techniques inédits, posent en même temps le problème de leur plus grande sensibilité au feu du fait de leur plus grande c
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Lukic, Bratislav. "Mise au point d'une technique de mesure de champs pour la caractérisation du comportement dynamique du béton en traction." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAI028/document.

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Ce travail thèse a pour objet une méthode expérimentale combinant un essai de traction indirect par écaillage et une mesure de champs à partir d’images obtenues par caméra ultra rapide, ceci à des fins d’identification des propriétés de rupture du béton sous chargement de traction dynamique. Cette méthode, proposée dans la littérature peu de temps avant le démarrage de ces travaux, fait ici l’objet d’une étude approfondi ainsi que d’une série de développements et d’amélioration. Les images obtenues sont traités par une technique de grille et la méthode des champs virtuels est appliquée pour id
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Alfredsson, Bo. "A study on contact fatigue mechanisms." Doctoral thesis, Stockholm, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3028.

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Palmert, Frans. "Oxidation and degradation of nickel-base alloys at high temperatures." Thesis, KTH, Materials Science and Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11986.

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<p>This master’s thesis work is a study of oxidation and degradation of nickel-base alloys at high temperatures. The materials studied are designed for use in critical gas turbine components such as turbine blades and vanes. Some of the alloys are used today, whereas others have not yet entered commercial application. In order to maximize the efficiency of gas turbines, there is an ambition to maximize the operating temperatures. There is therefore a demand for materials which can withstand the damage mechanisms active at high temperatures. Among these damage mechanisms are oxidation and micro
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Everitt, Carl-Magnus. "Initiation of rolling contact fatigue from asperities in elastohydrodynamic lubricated contacts." Licentiate thesis, KTH, Hållfasthetslära (Avd.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-222371.

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Rolling contacts are utilized in many technical applications, both in bearings and in the contact between gear teeth. These components are often highly loaded, which makes them susceptible to suffer from rolling contact fatigue. This work focuses on the rolling contact fatigue mechanism of pitting. In order to attain a better understanding of why pitting initiates and grows, detailed simulations of rolling contacts have been performed. In particular the contact between two gears in a truck retarder was here used as a case study. The investigated contact experienced elastohydrodynamic lubricati
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Fichtová, Zlata. "Chování cementových kompozitních materiálů s vláknovou výztuží při působení vysokých teplot." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225882.

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This master’s thesis studies the influence of dispersed reinforcement on the behaviour of cement composites at thermal loading. In the theoretical part of the research was performed knowledge of the behaviour of concrete at high temperatures. The paper describes the on-going happening in the individual components of concrete and benefits of using dispersed reinforcement. In the practical part were designed concrete mixtures with different types and quantities of fibers. The object of the research was to determine how different types and amounts of fibers affect the physical - mechanical proper
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Andersson, J. Christer. "Rock Mass Response to Coupled Mechanical Thermal Loading : Äspö Pillar Stability Experiment, Sweden." Doctoral thesis, KTH, Jord- och bergmekanik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4287.

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The geological disposal of nuclear waste, in underground openings and the long-term performance of these openings demand a detailed understanding of fundamental rock mechanics. A full scale field experiment: Äspö Pillar Stability Experiment was conducted at a depth of 450 m in sparsely fractured granitic rock to examine the rock mass response between two deposition holes. An oval shaped tunnel was excavated parallel to the σ3 direction to provide access to the experiment and also provide elevated stress magnitudes in the floor. In the tunnel floor two 1.75-m diameter 6-m deep boreholes were ex
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Malmros, Catrine, and Johnson Andrea. "Brandpåverkan på skyddskonstruktioner i funktionsskyddsrum : En undersökning av resthållfasthet i betongbalkar." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-40032.

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In the beginning of the 21st century decisions were made regarding the decommission of the total defence in Sweden. Since then the security policy situation has changed, regarding both the risk of war and other types of treats such as terrorism. Due to this the total defence is now being re-established. The Swedish Fortifications Agency and Research Institutes of Sweden (RISE) has initiated the Centre of excellence for fortification (CFORT) to support the development of competence in fortification. In case of a crisis or war secured function shelters constitutes a significant part of the Swedi
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Gonçalves, André Vinicius Martinez. "Manifestações e contradições da metrópole de São Paulo no antigo bairro de Santana: a paisagem, o valor da terra, a intervenção urbana e o fenômeno da deterioração urbana." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/8/8136/tde-18062007-150254/.

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Esta dissertação parte da tese que o avanço da Metrópole de São Paulo em direção ao antigo bairro de Santana, em especial, a partir dos anos de 1950, gerou ao espaço geográfico local, uma considerável diversidade espacial, implicando hoje, um mosaico de ealidades, tanto no aspecto de ocupação e uso do solo, como em relação às práticas sócio-espaciais. Essas realidades instauradas em Santana, na perspectiva do presente estudo são refletidas, sobretudo, a partir de duas questões: as intervenções urbanas, uma parcialmente efetivada nos anos de 1970, denominada Plano Cura Piloto de Santana, e outr
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