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Dissertations / Theses on the topic 'Wear OS'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Young, William G. "Tooth wear /." [St. Lucia, Qld.], 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17715.pdf.

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2

Done, Vamshidhar. "Numerical modeling of dry wear : Experimental study of fretting wear, fretting wear simulations with debris entrapped and industrial applications of fretting wear models." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI137.

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De nombreux modèles numériques sont proposés dans la littérature en utilisant des méthodes d'éléments finis et d'éléments finis discrets pour étudier l'usure par frottement, ils incluent à peine l'effet des débris d'usure. Ces modèles étant coûteux en termes de calcul, simuler un grand nombre de cycles d'usure par frottement n'est pas réalisable dans la pratique. Une nouvelle méthodologie est proposée qui ne nécessite que des propriétés de matériau en vrac comme les coefficients de frottement / usure et utilise des méthodes semi-analytiques pour simuler l'usure par frottement avec des débris p

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3

Oosthuizen, Gert Adriaan. "Wear characterisation in milling of Ti6Al4V : a wear map approach." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5426.

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Thesis (PhD (Industrial Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Information on the milling of Ti6Al4V is limited; with most studies concluding that it is not possible to obtain a significant increase in the material removal rate (Qw). Tool wear maps can be a diagnostic instrument for failure analysis. Cutting speed (vc), maximum un-deformed chip thickness (heMax) and the radial immersion percentage (ae/Ø %) are the key variables in understanding the milling of titanium alloys. The objective of this research study was to construct tool wear maps for the milling of

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4

Uusaro, Alexandra. "Analysis of wear life and mechanical stability for wear steel." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-86927.

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This thesis work is carried out in collaboration with Olofsfors AB. They manufacture steel products such as tracks and chains for forest machines and wear steel for plows and graders. The focus of this project is on wear steel. The aim with this project is to obtain a better understanding of mechanical stability and wear on different types of wear steel. This knowledge can then be used to prolong the life cycle in future products. This project was divided into two parts where the first one concerns wear steel for plows. In this part a comparison between six different steels was conducted usin

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5

Franklin, Francis James. "Modelling mild wear." Thesis, University of Sheffield, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312780.

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Chen, Yu-Chieh. "Versatile bridal wear." Thesis, Cape Peninsula University of Technology, 2010. http://hdl.handle.net/20.500.11838/1345.

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Thesis (BTech (Fashion Design))--Cape Peninsula University of Technology, 2010<br>In the 19th and 20th Century, products were manufactured with little concerns for the environment. The result of this was an over flowing of low quality products and a high elimination rate, especially in the fashion industry where constant change is the nature of the business. Particularly in bridal wears, the sustainability is deficient and practicality is limited. bridal garments would only be worn once and are usually highly priced. The purpose of this research is to explore whether consumers are willing

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7

Kronqvist, J. (Joel). "Wear-resistant materials." Bachelor's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201604211527.

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Materials used in wear-resistant applications are exposed to heavy loads and different environmental circumstances which generate mechanical wear and corrosion. By choosing the most suitable materials for the correct applications, you can affect the lifetime of the machine and create substantial cost savings. This thesis displays wear-resistant steels but also other wear-resistant materials, including irons, ceramics and polymers. Use of the materials is divided by the application. For dry applications with mechanical wear carbon steels are the optimal choice and for corrosion and tribo-chemi

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Hilt, Devin O. "Wedding - To - Wear." Kent State University Honors College / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1493989886206976.

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9

Bautista, Fernández Christian Hilario, Allende Angel Rafael Delgado, Trucíos Carolina Fuentes Rivera, and Franco Sarita Liliana Rentería. "INKA Sport Wear." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2018. http://hdl.handle.net/10757/624698.

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En el Perú la práctica por la natación crece cada vez más, no solo por la afición que causa entre las personas que lo practican, sino también por los beneficios que ofrece, al ser uno de los deportes más completos que existe. Las diferentes academias y/o institutos deportivos no se encuentran exentas a este crecimiento, tomando en cuenta las nuevas tendencias como la práctica de natación en mujeres embarazadas. Ante ello, es necesario contar con una prenda que se adecue a las necesidades específicas de cada cliente tanto en talla como en diseño frente a la constante demanda. El mercado actual

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10

Lim, S. C. "Wear mechanisms with particular reference to the wear of sintered materials." Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372885.

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11

De, Villiers Danielle. "Accelerated wear protocols for understanding clinical wear in modern hip prostheses." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/7981.

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Success of total hip replacements is well reported however, failures as a result of wear processes and the biological response to these products continue to challenge the orthopaedic community. Lately, corrosion of metal surfaces as well as wear particles have seen particular interest with elevated blood cobalt levels widely reported in patients receiving metal-on-metal (MoM) hip replacements. Some instances have also reported this in patients with metal-on-polyethylene (MoP) components and these corrosion products are believed to contribute to hypersensitivity reactions reported. This thesis

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12

Lindsey, Julie E. (Julie Elizabeth). "The Perception of Western Wear Status Symbols Among Western Wear Consumers." Thesis, University of North Texas, 1997. https://digital.library.unt.edu/ark:/67531/metadc279336/.

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This study determined whether an association exists between the perception of western wear status symbols and demographic characteristics {i.e., gender, age, income, and education level) among Texas American Paint Horse Association members.

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13

Russell, Serena Louisa. "Friction, wear, wear debris and functional biocompatibility of cartilage substitution biomaterials." Thesis, University of Leeds, 2010. http://etheses.whiterose.ac.uk/12742/.

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The friction, wear and biological response to hydrogels, thermoset and thermoplastic polyurethanes were investigated in order to determine their suitability as potential cartilage substitution biomaterials. A single station pin-on-plate friction rig was utilised to determine the friction properties of these materials when articulated against articular cartilage plates and stainless steel plates. These materials were also reciprocated against stainless steel plates with smooth and rough surfaces using a six station multidirectional wear rig to generate clinically relevant sized wear particles w

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14

Dahlström, Alexander. "Wear mechanisms in austenitic stainless steel drilling : A comprehensive wear study." Thesis, KTH, Materialteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175771.

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This thesis is meant to serve as part of a competence platform for future product development projects at Sandvik Coromant AB, Solid Round Tools Department, Västberga, Sweden. The project objective is to gain generic knowledge of the wear mechanisms that restrict tool lifetime when drilling austenitic stainless steel. Thus, identifying if the weakest link of the tool is located within the coating, the coating adherence or in the strength of the substrate. A theoretical review of the work-piece and tool materials has been conducted as a background, along with definition of tool geometry and pr

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15

Mussa, Abdulbaset. "Wear characterization and wear mapping of a coated cutting tool : Development of cutting tool test fixture and wear testing." Thesis, Karlstads universitet, Science, Mathematics and Engineering Education Research (SMEER), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-37790.

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Wear mechanisms of the cutting tools are well investigated worldwide. Usually researchers use the cutting process itself, turning by single point cutting, as their investigation method, which includes turning a metal cylinder with a pre-selected work-material and predetermined cutting conditions. Thereafter the tool worn surface is examined by scanning electron microscopy in order to characterize the tool wear mechanisms and tool failure. However, this may be the most appropriate way to investigate the wear mechanisms which occur during machining since it simulates the real operation. Metal cu

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16

Hernandez, Sinuhe. "High Temperature Wear Processes." Licentiate thesis, Luleå tekniska universitet, Maskinelement, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16827.

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Moving machine assemblies are increasingly exposed to extreme operating conditions involving high temperatures owing to demands on higher power densities, high performance/efficiency and extreme environments. The changes in surface and near surface properties of contacting surfaces caused by exposure to high temperature and deformation govern the occurrence of friction, wear and material transfer of the tribological system. However, these changes have not been thoroughly investigated. In order to enable development of new products and processes, there is a need for new knowledge pertaining to

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17

Cutler, H. Bernice. "Ready to wear architecture." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ39645.pdf.

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18

Ting, Bond-Yen. "A thermomechanical wear theory." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/17629.

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19

Franco, Jr Adolpho. "Erosive wear of alumina." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320591.

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20

Ding, Jian. "Modelling of fretting wear." Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275169.

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21

Sharp, Steven John. "The wear of polymers." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627424.

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22

Martinsson, Johan. "Wear of Grate Plates." Thesis, KTH, Materialvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160603.

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This report describe the wear of the protruding areas on the sides of the grate plates in the grate-kiln process in the hematite pellet production in LKAB, Kiruna. The steel plates are exposed to a hostile environment with heat cycles and corrosive atmosphere. An evaluation of the plates was made in co-operation with LKAB Metlab in Luleå and LKAB mechanical workshop in Kiruna. Instruments used are stereomicroscope, LOM, SEM, Spectroscope, Vickers Hardness and a surface nish meter. Results show the protruding areas of the plates are exposed to a tribochemical wear, where tops of the rough areas

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23

Öqvist, Mona. "Numerical simulations of wear." Licentiate thesis, Luleå tekniska universitet, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26185.

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The objective of this licentiate thesis was to study the effect of tool wear for sheet metal forming tools and how the wear process can be simulated in an efficient manner. Three Papers are appended to this licentiate thesis. Paper A covers the influence of tool geometry in deep drawing. In paper B is the way of calculating with finite element analysis described. The wear of a steel cylinder oscillating against a steel plate was studied experimentally. The worn shape of the cylinder was then compared with a numerical simulation of the shape. Paper C shows how numerical simulations can be used

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24

Birgmark, Anja. "Wear of Coater Blades." Thesis, Karlstads universitet, Fakulteten för teknik- och naturvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-27183.

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25

Rainforth, William Mark. "Metal ceramic wear mechanisms." Thesis, University of Leeds, 1990. http://etheses.whiterose.ac.uk/4415/.

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Sliding wear of metal-on-ceramic, ceramic-on-metal, and ceramic-on-ceramic have been investigated using a tri-pin-on-disc machine. A technique has been developed for thin foil preparation for transmission electron microscopic examination perpendicular to the wear surface. The role of transformation toughening in the wear behaviour of zirconia ceramics has been investigated. In addition, the role of high strain deformation in a steel surface has been evaluated. The wear factor of 316L stainless steel pins worn against a zirconia disc was found to decrease as the load was increased, believed to

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26

Jungedal, m. "Mild impact wear in a concrete mixer : An evaluation of wet abrasive wear." Thesis, KTH, Materialvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-161557.

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The concrete mixer industry is affected by abrasive wear under both dry and wet conditions. An upgrade of the material inside the drums to high abrasion resistant steel grades can improve the lifetime and offer the possibility to reduce the weight of the drum. A new wear testing apparatus was designed to simulate the wear conditions in a concrete mixer truck with the aim to investigate the relative wear resistance for a number of steel grades. Three tests were performed under wet conditions using 16-25 mm crushed granite. The tests focused on the wear resistance under sliding and impact wear f

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27

Adeva, Rodil Teresa. "Edge effect on abrasive wear mechanisms and wear resistance in WC-6wt.% Co hardmetals." Thesis, Karlstad University, Division for Engineering Sciences, Physics and Mathematics, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-375.

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<p>Wear of hardmetals is a complicated topic because the wear resistance and the wear mechanisms are influenced by microstructural factors. Although edge wear resistance has a vital importance, most of the researches made in laboratories are related to flat wear resistance using coarse abrasive paper. This situation produces problems with the prediction of abrasive wear behaviour and with the estimation of the lifetime of cutting edges of different kinds of tooling.</p><p>Several studies have been done in order to clarify edge wear behaviour. It has been published correlations of the edge toug

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28

SUH, Min-Soo. "Wear Mechanisms on SiC and SiC/SiC Composites under Sliding Friction and Erosive Wear." Kyoto University, 2010. http://hdl.handle.net/2433/126768.

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MacCrimmon, Donald. "Automotive brake wear debris analysis /." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1791982261&sid=5&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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30

Gåård, Anders. "Wear in sheet metal forming." Licentiate thesis, Karlstad University, Faculty of Technology and Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-1592.

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<p>The general trend in the car body manufacturing industry is towards low-series production and reduction of press lubricants and car weight. The limited use of press lubricants, in combination with the introduction of high and ultra-high strength sheet materials, continuously increases the demands of the forming tools. To provide the means of forming new generations of sheet material, development of new tool materials with improved galling resistance is required, which may include tailored microstructures, introducing of specific(MC, M(C,N))carbides and nitrides, coatings and improved surfac

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31

Söderberg, Anders. "Interface modeling - friction and wear." Doctoral thesis, KTH, Maskinkonstruktion (Avd.), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9861.

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The general trend toward increased use of computer models and simulations during product development calls for accurate and reliable product models. The function of many products relies on contact interfaces between interacting components. Simulating the behavior of such products requires accurate models of both components and interfaces. Depending on the purpose of the simulation, interface models of different degrees of detail are needed. In simulating very large systems with many interfaces, it might be computationally expensive to integrate detailed models of each individual interface. Con

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32

Odelros, Stina. "Tool wear in titanium machining." Thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-176944.

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The present work was performed at AB Sandvik Coromant as a part in improving the knowledge and understanding about wear of uncoated WC/Co cutting tools during turning of titanium alloy Ti-6Al-4V. When machining titanium alloys, or any other material, wear of the cutting tools has a huge impact on the ability to shape the material as well as the manufacturing cost of the finished product. Due to the low thermal conductivity of titanium, high cutting temperatures will occur in narrow regions near the cutting edge during machining. This will result in high reaction and diffusion rates, resulting

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33

Kato, Hirotaka. "Sliding wear of nitrided steels." Thesis, Brunel University, 1993. http://bura.brunel.ac.uk/handle/2438/5200.

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The unlubricated sliding wear behaviour of gas nitrided, plasma nitrided, and ferritic nitrocarburized BS970,905M39 (EN41B) steels was investigated systematically from an engineering point of view. Commercial nitriding processes were employed, and the wear studies were carried out using a pin-on-disc machine over a wide range of sliding speeds and applied loads. The worn specimens and wear debris were examined by several techniques; including optical and electron microscopy and X-ray analysis. A sharp wear rate transition between mild and severe regimes was identified by varying the load for b

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Lingesten, Niklas. "Wear behavior of wet clutches." Licentiate thesis, Luleå tekniska universitet, Maskinelement, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18354.

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Human civilization is largely based on the transformation of stored chemical energy in the form of fossil fuels into usable work through the use of the combustion engine. In recent years, the awareness of problems such as global warming due to emissions of greenhouse gases and the depletion of fossil fuel reserves has increased. New regulations have been put into place in order to limit these effects and as a result, the efforts made by the automotive industry to limit the emissions and fuel consumption of their products has taken a higher priority. Attempting to minimize power losses is one a

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35

Jekl, John A. "Wear of thermosetting polymer bearings." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0003/MQ32486.pdf.

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36

Kristjanson, Donna M. "I started to wear night." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0012/MQ32933.pdf.

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37

Yang, Jinseung. "Application of thermomechanical wear theory." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/17203.

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38

Paulls, Andrew. "Wear mechanisms in screw presses." Thesis, University of Hull, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395505.

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Whitehead, Alexander. "Samian: a use-wear perspective." Thesis, University of Reading, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485393.

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The Roman conquest of Britain presages extensive changes in local material culture. This elaboration of material meant that people in Roman Britain were continually engaged in making choices and selections in material use for tasks of survival that faced them in their daily lives. Material culture is thus first and foremost something used to achieve an end, yet archaeology, normally being constrained to look at material culture in symbolic and thus semiotic terms, rarely looks at this most human and basic aspect of material culture, the way it was lived. There is thus a rupture between what ar

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40

Burton, Andrew Peter. "Wear of unicompartmental knee replacements." Thesis, University of Leeds, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427771.

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Robb, Nigel Douglas. "Epidemiological studies in tooth wear." Thesis, King's College London (University of London), 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308314.

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42

Watkins, Shaun Gareth. "Wear fatigue in nickel superalloys." Thesis, Swansea University, 2015. https://cronfa.swan.ac.uk/Record/cronfa43108.

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To date, work to assess the progression of wear and the effects of wear damage on low cycle fatigue has tended to be focused on specific components and their operating conditions. Although effective in the short term to solve today’s problems, these efforts often deliver insufficient understanding of the overall design space limits to have much influence of future component design. Therefore, the following research attempts to understand how wear damage progresses and how it impacts on fatigue performance in order to develop more accurate lifing models to predict the behaviour and life of real

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43

Marcus, Kashif. "Micromechanisms of polymer sliding wear." Doctoral thesis, University of Cape Town, 1993. http://hdl.handle.net/11427/22408.

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A study has been made concerning the tribological behaviour of ultrahigh molecular weight polyethylene (UHMWPE) during water-lubricated reciprocating sliding wear. The experimental work has been extended to study also the effect of molecular weight, fillers, lubrication, counterface roughness and sliding configuration on the polymer's transfer characteristics. The wear behaviour of polytetrafluoroethylene (PTFE) has been included for comparative studies. The worn material was studied using stylus profilometry, optical microscopy, scanning electron microscopy (SEM), energy dispersive x-ray spec

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Gåård, Anders. "Wear in sheet metal forming /." Karlstad : Faculty of Technology and Science, Materials Engineering, Karlstad University, 2008. http://www.diva-portal.org/kau/abstract.xsql?dbid=1592.

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Söderberg, Anders. "Interface modeling : friction and wear /." Stockholm : Maskinkonstruktion, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9861.

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MacCrimmon, Donald Cody. "Automotive Brake Wear Debris Analysis." OpenSIUC, 2009. https://opensiuc.lib.siu.edu/theses/486.

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Passenger vehicle disk brakes produce large amounts of wear debris that needs to be analyzed to verify its environmental and health impact because its effects are amplified by the massive extent of vehicular transportation around the world. An efficient and thorough method for wear debris analysis should be derived from this research to assist brake manufacturers and researchers in understanding the characteristics of wear particulates being released from current brake materials. In addition, a test method allowing inspection of brake formulations in development phase should be provided and s

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Forssblad, Matilda. "Braveheart fashion wear : Dressing titles." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-22111.

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Fashion involves more than material garments. It is extended to the settings surrounding it. We wear and dress in more than clothes, we do it in scents and lights, in objects and images. Today, when fashion mostly is consumed in pictures - a representation of the physical garment - there is a need for a shifted view of what fashion design is and potentially can become. This work aims to explore and extend the domain of fashion by using text titles as a catalyst for creative activity and seek to move beyond traditional outlets of fashion. Each title becomes a project in itself. Together they fo

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48

Nilsson, Rickard. "On wear in rolling/sliding contacts." Doctoral thesis, KTH, Machine Design (Div.), 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122.

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<p>The aim of this thesis is to increase the understanding of wear in rolling/sliding contacts such as the wheel-rail contact for railroads and the roller-washer contact for roller bearings.</p><p>The Stockholm commuter train network has been the subject of papers A and B in this thesis in which the wear and surface cracks on rails has been observed for a period of three years. By comparing the wear depth with the crack length, equilibrium between these two damage mechanisms was found for a lubricated rail. By using a lubricant with friction modifiers the stresses was low enough to prevent cra

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Flodin, Anders. "Wear of spur and helical gears." Doctoral thesis, KTH, Machine Design, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2986.

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50

Abachi, Siamak. "Wear Analysis Of Hot Forging Dies." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605706/index.pdf.

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WEAR ANALYSIS OF HOT FORGING DIES ABACHI, Siamak M. S., Department of Mechanical Engineering Supervisor: Prof. Dr. Metin AKK&Ouml<br>K Co-Supervisor: Prof. Dr. Mustafa lhan G&Ouml<br>KLER December 2004, 94 pages The service lives of dies in forging processes are to a large extent limited by wear, fatigue fracture and plastic deformation, etc. In hot forging processes, wear is the predominant factor in the operating lives of dies. In this study, the wear analysis of a closed die at the final stage of a hot forging process has been

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