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Rozprawy doktorskie na temat „Mechanical and Metallurgical properties”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Raghavendra, Sunil. "Metallurgical and Mechanical Properties of Additively Manufactured Cellular Structures." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/296507.

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Naturally occurring cellular materials are always optimized in terms of morphology, structural resistance, and functionality. The use of cellular materials is based on the application as well as the loading condition. Cellular materials are composed of an interconnected network of struts, plates, or repeating unit cells, forming edges or faces. The properties of these structures can be tailored according to the requirements by changing one or more of the parameters mentioned above. This makes cellular materials suitable for various applications ranging from aerospace to biomedical. In biomedic

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Raghavendra, Sunil. "Metallurgical and Mechanical Properties of Additively Manufactured Cellular Structures." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/296507.

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Naturally occurring cellular materials are always optimized in terms of morphology, structural resistance, and functionality. The use of cellular materials is based on the application as well as the loading condition. Cellular materials are composed of an interconnected network of struts, plates, or repeating unit cells, forming edges or faces. The properties of these structures can be tailored according to the requirements by changing one or more of the parameters mentioned above. This makes cellular materials suitable for various applications ranging from aerospace to biomedical. In biomedic

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Sathian, Sujith. "Metallurgical and mechanical properties of Ni-based superalloy friction welds." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0005/MQ46104.pdf.

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Ashcroft, Emma Jane. "Mechanical and metallurgical properties of dissimilar metal joints using novel joining techniques." Thesis, Sheffield Hallam University, 2008. http://shura.shu.ac.uk/17350/.

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In recent years there have been significant new developments in welding processes for joining stainless steel and dissimilar metals. This is associated with the rise in interest of using stainless steel in the automotive industry from both car manufacturers and stainless steel producers. The main reason for using stainless steel within the automotive industry is the combination of formability and high strength but also the improved corrosion resistance when compared to zinc coated mild steel. This research explores the mechanical and metallurgical properties of dissimilar metal joining and det

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5

Erdem, Derya. "Microwave Sintering And Characterization Of Soft Magnetic Powder Metallurgical Ni-fe Alloys." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613550/index.pdf.

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In this study, prealloyed austenitic stainless steel and premixed soft magnetic Ni-Fe permalloy compacts were consolidated through microwave and conventional sintering routes at combinations of various sintering temperatures and compaction pressures. Sintered alloys were characterized in terms of their densification, microstructural evolution as well as mechanical and magnetic properties. The effect of sintering method in terms of the applied sintering parameters on the final properties of the compacts were investigated in a comparative manner. It was determined that microwave sintered permall

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6

Rickinson, N. "Characterisation of the metallurgical and thermo-mechanical properties of niobium HSLA steel during hot strip rolling." Thesis, Swansea University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638666.

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Predictions of finishing stand loads in the hot strip mill require a precise understanding of the microstructural evolutionary changes occurring during and after deformation. In order to generate this understanding, it is important to use reliable and accurate techniques. Hence, suitable equipment was developed to produce a controlled testing medium. Single and double uni-axial compression testing was carried out on two steels: a niobium-bearing HSLA and a carbon manganese steel. Testing was carried out between 850°C, 950°C and 1050°C at strain rates of 0.01/s to 1/s, with true strain reductio

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Toumpis, Athanasios I. "Characterisation of metallurgical and mechanical properties of friction stir welded low alloy steels for marine applications." Thesis, University of Strathclyde, 2015. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=26008.

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Paternoster, Carlo. "Mechanical properties of nanostructured coatings." Doctoral thesis, Università Politecnica delle Marche, 2009. http://hdl.handle.net/11566/242312.

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9

Granbom, Ylva. "Structure and mechanical properties of dual phase steels : An experimental and theoretical analysis." Doctoral thesis, KTH, Mekanisk metallografi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-24869.

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The key to the understanding of the mechanical behavior of dual phase (DP) steels is to a large extent to be found in the microstructure. The microstructure is in its turn a result of the chemical composition and the process parameters during its production. In this thesis the connection between microstructure and mechanical properties is studied, with focus on the microstructure development during annealing in a continuous annealing line. In-line trials as well as the lab simulations have been carried out in order to investigate the impact of alloying elements and process parameters on the mi

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Facchini, Luca. "Microstructure and mechanical properties of biomedical alloys produced by Rapid Manufacturing techniques." Doctoral thesis, Università degli studi di Trento, 2010. https://hdl.handle.net/11572/368037.

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Rapid Manufacturing (RM) technologies as Electron Beam Melting (EBM) and Selective Laser Melting (SLM) are able to produce fully dense parts from pre-alloyed powders in a layer-wise way. Moreover, they are able to create tailored surfaces with interconnected porosity. Applied to biomedical prostheses, such porosity can favour cell adhesion and osteointegration. The most important intrinsic characteristic of RM techniques is the large undercooling the parts undergo during the process. This undercooling results in peculiar, very fine, metastable microstructures, associated to peculiar mechanical

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Facchini, Luca. "Microstructure and mechanical properties of biomedical alloys produced by Rapid Manufacturing techniques." Doctoral thesis, University of Trento, 2010. http://eprints-phd.biblio.unitn.it/193/1/PhD_thesis_Luca_Facchini.pdf.

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Rapid Manufacturing (RM) technologies as Electron Beam Melting (EBM) and Selective Laser Melting (SLM) are able to produce fully dense parts from pre-alloyed powders in a layer-wise way. Moreover, they are able to create tailored surfaces with interconnected porosity. Applied to biomedical prostheses, such porosity can favour cell adhesion and osteointegration. The most important intrinsic characteristic of RM techniques is the large undercooling the parts undergo during the process. This undercooling results in peculiar, very fine, metastable microstructures, associated to peculiar mechanica

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12

Tonelli, Lavinia <1987&gt. "Additive Manufacturing by LPBF and WAAM of metals: correlation between production process, microstructure and mechanical properties." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amsdottorato.unibo.it/9629/1/LaviniaTonelli_PhDThesis.pdf.

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In the most recent years, Additive Manufacturing (AM) has drawn the attention of both academic research and industry, as it might deeply change and improve several industrial sectors. From the material point of view, AM results in a peculiar microstructure that strictly depends on the conditions of the additive process and directly affects mechanical properties. The present PhD research project aimed at investigating the process-microstructure-properties relationship of additively manufactured metal components. Two technologies belonging to the AM family were considered: Laser-based Powder Bed

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13

Zvoníček, Josef. "Vývoj procesních parametrů pro zpracování hliníkové slitiny AlSi7 technologií Selective Laser Melting." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-444404.

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The diploma thesis deals with the study of the influence of process parameters of AlSi7Mg0.6 aluminum alloy processing using the additive technology Selective Laser Melting. The main objective is to clarify the influence of the individual process parameters on the resulting porosity of the material and its mechanical properties. The thesis deals with the current state of aluminum alloy processing in this way. The actual material research of the work is carried out in successive experiments from the welding test to the volume test with subsequent verification of the mechanical properties of the

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14

Hradil, David. "Mechanicko strukturní charakteristiky materiálů vyrobených metodou SLM." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254320.

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The master's diploma thesis deals with the mechanical and structural characteristics of aluminium-base alloy 2000 series, produced by selective laser melting (SLM). The experimental part of the thesis deal with selection of SLM processing parameters, influence of scanning strategy and evaluation of mechanical and structural characteristics of fabricated materials. Mechanical characteristics were evaluated based on results of tensile tests and microhardness measurement. Structural characteristics of materials produced by SLM were evaluated using metallographic analysis.

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15

Zhang, Zuotai. "Synthesis and Characterization of MgA1ON-BN refractories." Doctoral thesis, KTH, Materialvetenskap, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3883.

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In order to meet the need of metallurgical industry in the world, a new MgAlON-BN composite which can be used for example in special refractory nozzles, tubes and break rings for the continuous casting of steel was studied in the present thesis. The aim was to understand the mechanism of synthesis and their physicochemical properties during the application. Thus, the thermodynamic properties, synthesis process, mechanical properties, thermal shock behaviour, thermal diffusivity/conductivity as well as corrosion resistance to molten iron containing oxygen and molten slag of MgAlON and MgAlON-BN

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16

MERLIN, Mattia. "CORRELATION BETWEEN MICROSTRUCTURAL AND MECHANICAL PROPERTIES OF ALUMINUM ALLOY CASTINGS PRODUCED BY DIFFERENT FOUNDRY PROCESSES." Doctoral thesis, Università degli studi di Ferrara, 2009. http://hdl.handle.net/11392/2389203.

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Aluminum is quite a new material and the production of aluminumalloy castings has greatly increased in the last recent years. Nowadays, there is a continuous market requirement to produce lighter vehicles and to increase fuel efficiency, therefore roughly two thirds of all aluminum castings production is within the automotive field. Even though the applications of aluminum in this scenario are considerable, some aspects affecting the quality and the soundness of cast products are still not fully understood. The aim of the research work presented in this PhD thesis was to study the corr

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17

Toschi, Stefania <1986&gt. "Cast Aluminum Alloys and Al-Based Nanocomposites with Enhanced Mechanical Properties at Room and High Temperature: Production and Characterization." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7495/1/Toschi_Stefania_tesi.pdf.

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The present PhD thesis summarizes the results of experimental activities carried out on the production and characterization of cast aluminum alloys and Al-based nanocomposites for room and high temperature applications. Two quaternary Al-Si-Cu-Mg alloys (A354 and C355) were studied, aiming to investigate the effect of chemical composition, solidification rate and heat treatment condition on the tensile and fatigue behavior at room and high temperature. Heat treatment optimization of A354 alloy was carried out. The overaging behavior of A354 and C355 alloys was compared to that of A356 (Al-Si-M

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Toschi, Stefania <1986&gt. "Cast Aluminum Alloys and Al-Based Nanocomposites with Enhanced Mechanical Properties at Room and High Temperature: Production and Characterization." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7495/.

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The present PhD thesis summarizes the results of experimental activities carried out on the production and characterization of cast aluminum alloys and Al-based nanocomposites for room and high temperature applications. Two quaternary Al-Si-Cu-Mg alloys (A354 and C355) were studied, aiming to investigate the effect of chemical composition, solidification rate and heat treatment condition on the tensile and fatigue behavior at room and high temperature. Heat treatment optimization of A354 alloy was carried out. The overaging behavior of A354 and C355 alloys was compared to that of A356 (Al-Si-M

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19

LATTANZI, LUCIA. "Influence of alloying elements and melt treatments on microstructure and mechanical properties of the AlSi7Mg alloy." Doctoral thesis, Università degli studi di Ferrara, 2020. http://hdl.handle.net/11392/2488242.

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During the last decades, the employment of AlSi7 cast alloys in the automotive industry has significantly improved because vehicles result lighter and more eco-friendly. Thus it is crucial to increase the knowledge about the properties of such alloys in order to optimise them through precise control of chemical composition, well-performed melt treatments and tailored heat treatments. The present work focuses on the influence of alloying elements and melt treatments on microstructure and mechanical properties of the AlSi7Mg alloy. The main alloying elements involved in the AlSi7Mg systems are m

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20

SOUZA, EDVALDO R. de. "Caracterizações microestruturais e avaliações das propriedades mecânicas das juntas em aço inoxidável AISI 301 L soldadas por MIG e submetidas ao reparo pelo processo TIG." reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26797.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2016-11-11T09:40:30Z No. of bitstreams: 0<br>Made available in DSpace on 2016-11-11T09:40:30Z (GMT). No. of bitstreams: 0<br>A soldagem tem grande importância no setor metroferroviário, pois é empregada na fabricação de componentes estruturais e no acabamento de vagões de passageiros, que em sua maior parte são de aço inoxidável. As juntas soldadas podem apresentar descontinuidades que são interrupções que afetam as propriedades mecânicas e metalúrgicas da junta soldada. A presença destas descontinuidades, dependendo do seu tamanho, natur

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21

CASARI, Daniele. "THE GRAIN REFINEMENT AND THE Ni/V CONTAMINATION IN THE A356 ALUMINIUM CASTING ALLOY: AN EXPERIMENTAL STUDY ON IMPACT AND TENSILE PROPERTIES." Doctoral thesis, Università degli studi di Ferrara, 2014. http://hdl.handle.net/11392/2389412.

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Westin, Elin M. "Microstructure and properties of welds in the lean duplex stainless steel LDX 2101." Doctoral thesis, KTH, Metallografi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-27387.

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Duplex stainless steels can be very attractive alternatives to austenitic grades due to their almost double strength at equal pitting corrosion resistance. When welding, the duplex alloys normally require addition of filler metal, while the commodity austenitic grades can often be welded autogenously. Over-alloyed consumables are used to counteract segregation of important alloying elements and to balance the two phases, ferrite and austenite, in the duplex weld metal. This work focuses on the weldability of the recently-developed lean duplex stainless steel LDX 2101® (EN 1.4162, UNS S32101).

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Facchinelli, Nicola. "Microstructural and technological optimisation of magnesium alloys." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3426654.

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Magnesium is one of the most abundance element in nature, and it's characterised by a lower density than aluminium. These characteristics confer great potential to magnesium alloys, which are so used for specialised applications, like for military purposes and in the aerospace industry. While some magnesium alloys, including the AM60B alloy, are historically associated to high pressure die casting, for such applications the magnesium alloy components are usually produced by the gravity casting process, in order to minimise the defect's content and to achieve better castings' mechanical propert

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Villa, Matteo. "Metallurgical and mechanical modelling of Ti-6Al-4V for welding applications." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6910/.

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Complex heat treatments and manufacturing processes such as welding involve a wide range of temperatures and temperature rates, affecting the microstructure of the material and its properties. In this work, a diffusion based approach to model growth and shrinkage of precipitates in the alpha + beta field of Ti-6Al-4V alloys is established. Experimental heat treatments were used to validate the numerical predictions of the model for lamellar shrinkage, whilst data from literature have been used to evaluate the numerical model for the growth of equiaxed microstructures. The agreement between mea

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Borsato, Thomas. "Metallurgical and mechanical characterization of standard and new generation cast irons." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3425399.

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The demand for ductile cast iron components, with weights ranging from a few kilograms to several tons, has increased significantly in recent years, both for technical and economic reasons. In fact, the lower cost compared to other materials, the good castability, which allows to obtain near-net shape components in as-cast conditions, and the mechanical properties that can be obtained, are just some of the motivations that attract mechanical designers. In the case of large components, the knowledge of mechanical behaviour is however limited and incomplete. What is known is that, by increasing

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Beynon, N. D. "Relationship between the metallurgical properties and crash performance of automotive structures." Thesis, Swansea University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636093.

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Work was undertaken to establish whether microstructural changes during high-speed deformation could explain the inferior crash performance of mild steel compared to carbon-manganese grades, which in turn are deemed inferior to dual phase steel grades. This thesis correlates the relationship between the mechanical properties of commercial sheet steel and crashworthiness of steel structures. In order to deliver the correlation a research project was undertaken that included quasi-static tensile testing and dynamic tensile testing, following by a study of box section testing using quasi-static c

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Baldo, Silvia. "Innovative steels for structural and corrosion resistance applications." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3422747.

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The attention towards innovative steels at limited cost increased significantly in the last years. The research focused mainly in the development of new high strength steels where a combination of elevated mechanical properties, good formability and weldability is required and of duplex stainless steels if high corrosion resistance and mechanical properties are demanded. The possibility to design new light components thanks to the higher strength of such steels, the substitution of expensive raw elements and the new specific production processing have permitted to achieve a global costs saving

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Li, Liping. "Mathematical modeling of fluid flow and mixing in metallurgical reactors with bottom gas injections." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10685.

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Erdemir, Ali. "A study of surface metallurgical characteristics of tin coated bearing steels." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/20134.

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Taysom, Brandon Scott Boyer. "Controlling Weldment and Metallurgical Properties Through Process Control in Rotary Friction Welding." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/8705.

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Weld quality in the context of process control and internal conditions is studied. Several different alloys are welded including plain carbon steel, high-temperature steels, and several traditional and advanced superalloys. Across all studied weld systems, the following conditions led to stronger welds: higher forces and feedrates, lower temperatures, and moderate or limited upsets. In the best cases, post-weld strengths were nearly equal to basemetal strength. Tradition holds that large and symmetric upsets are necessary for good welds, but this study contradicts that notion. The fundamental

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Conca, Luca. "Mechanical properties of polymer glasses : Mechanical properties of polymer glasses." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1050/document.

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Ce manuscrit présente des récentes extensions au modèle PFVD, basé sur l'hétérogénéité de la dynamique des polymères vitreux à l'échelle de quelques nanomètres et résolu par simulation en 3D, afin de fournir une description physique unifiée des propriétés mécaniques et dynamiques des polymères vitreux soumis à déformation plastique. Trois sujets principaux sont traités : La plastification. Sous déformation, les polymères atteignent le seuil de plasticité (yield) à quelques pourcents de déformation et quelques dizaines de MPa. Nous proposons que l'énergie élastique absorbée à l'échelle des hété

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Persson, Mikael. "Investigations of Slag Properties and Reactions." Doctoral thesis, Stockholm : Materialvetenskap, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4378.

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Gill, David. "A study of the metallurgical and mechanical property variability in a dual phase low alloy material." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=28750.

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Muwanguzi, Abraham Judah Bumalirivu, Karasev V. Andrey, Byaruhanga K. Joseph, and Jönsson G. Pär. "Characterisation of the Physical and Metallurgical Propertiesof Natural Iron Ore for Iron Production." KTH, Tillämpad processmetallurgi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-123058.

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The blast furnace is still the dominant form of iron production, but over the years, direct reduction methods have increased due to a number of reasons. Overall, iron production methods have optimal requirements with respect to the feed materials especially iron ore. In this study, tests were carried out on Muko iron ore from Uganda to analyse its suitability to meet the feed requirements of today's dominant iron production methods. More specifically, the Tumbler, Abrasion, and Shatter Indices of the ore were determined. In addition, porosity, thermoanalysis, and reducibility tests were perfor

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Ferraro, Stefano. "Influence of trace elements on secondary die-cast aluminium alloys." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423822.

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Recycling play a key role on saving of natural resources and on reducing pollution. The recycling of aluminium alloys is also cost-effective, since it reduce the material cost and creates a considerable energy-saving. The use of recycled Al alloys (usually called secondary) has improved in recent years also because of their comparable mechanical properties with primary aluminium alloys. During the production of secondary aluminium alloys, the scrap are mixed regardless of their specific chemical composition, and then master alloys or pure elements are added to the molten metal. Furthermore,

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Ozdemir, Gokhan. "Mechanical Properties Of Cfrp Anchorages." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605890/index.pdf.

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Due to inadequate lateral stiffness, many reinforced concrete buildings are highly damaged or collapsed in Turkey after the major earthquake. To improve the behavior of such buildings and to prevent them from collapse, repair and/or strengthening of some reinforced concrete elements is required. One of the strengthening techniques is the use of CFRP sheets on the existing hollow brick masonry infill. While using the CFRP sheets their attachment to both structural and non-structural members are provided by CFRP anchor dowels. In this study, by means of the prepared test setup, the pull-out stre

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Dimitriu, Radu. "Complex mechanical properties of steel." Thesis, University of Cambridge, 2009. https://www.repository.cam.ac.uk/handle/1810/218319.

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Whereas considerable progress has been reported on the quantitative estimation of the microstructure of steels as a function of most of the important determining variables, it remains the case that it is impossible to calculate all but the simplest of mechanical properties given a comprehensive description of the structure at all conceivable scales. Properties which are important but fall into this category are impact toughness, fatigue, creep and combinations of these phenomena. The work presented in this thesis is an attempt to progress in this area of complex mechanical properties in the co

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Drodge, Daniel Ryan. "Mechanical properties of energetic composites." Thesis, University of Cambridge, 2010. https://www.repository.cam.ac.uk/handle/1810/265501.

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This thesis presents research into the mechanical response of particulate polymer composites, both energetic and inert, that contributes towards the wider understanding of deformation and damage mechanisms in Polymer Bonded Explosive (PBXs). Specifically, high and low strain-rate compression experiments were performed on several composites, with a view to measuring their elastic properties. A brief review of PBXs, polymers and particulate composites forms chapter 1. A key piece of mechanical testing apparatus, the Split Hopkinson Pressure Bar (SHPB), is critically assessed in chapters 2 and 3.

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Rains, Jeffrey K. "Mechanical properties of tracheal cartilage." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27994.

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Large airways collapse has been implicated as one of the causes of maximal expiratory flow limitation. Since cartilage plays an important role in maintaining the form of these airways, an understanding of the mechanical properties of the cartilage is necessary for a better understanding of the mechanisms which limit maximal expiratory flow. This work establishes a technique whereby the tensile stiffness of human tracheal cartilage can be determined using uniaxial equilibrium tensile tests. A technique was developed in which standard shaped specimens were cut from tracheal cartilage rings and t

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Lintzén, Nina. "Mechanical properties of artificial snow." Licentiate thesis, Luleå tekniska universitet, Geoteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16798.

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Mechanical properties of snow have been a subject of research since the mid-20th century. Theresearch done is based on natural snow. During the last decades the winter business industryhas been growing and also the interest for constructing buildings and artwork of snow. Suchconstructions are generally built using artificial snow, i.e. snow produced by snow guns. Up tothe present constructions of snow are designed based on knowledge by experience. Only minorscientific studies on artificial snow and its properties has been published. Hence it is ofimportance to investigate material properties f

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Root, Samuel E. "Mechanical Properties of Semiconducting Polymers." Thesis, University of California, San Diego, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10745535.

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<p> Mechanical softness and deformability underpin most of the advantages offered by semiconducting polymers. A detailed understanding of the mechanical properties of these materials is crucial for the design and manufacturing of robust, thin-film devices such as solar cells, displays, and sensors. The mechanical behavior of polymers is a complex function of many interrelated factors that span multiple scales, ranging from molecular structure, to microstructural morphology, and device geometry. This thesis builds a comprehensive understanding of the thermomechanical properties of polymeric sem

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Virues, Delgadillo Jorge Octavio. "Mechanical properties of arterial wall." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/923.

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The incidence of restenosis has been shown to be correlated with the overstretching of the arterial wall during an angioplasty procedure. It has been proposed that slow balloon inflation results in lower intramural stresses, therefore minimizing vascular injury and restenosis rate. The analysis of the biomechanics of the arterial tissue might contribute to understand which factors trigger restenosis. However, few mechanical data are available on human arteries because of the difficulty of testing artery samples often obtained from autopsy while arteries are still considered "fresh". Various so

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Choi, Hwa-Soon. "Mechanical properties of canine pericardium." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/15492.

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Puaud, Max. "Mechanical properties of biopolymer films." Thesis, University of Nottingham, 2000. http://eprints.nottingham.ac.uk/11624/.

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Hard gelatin capsules have been used for drug delivery for a long time. The current production process takes advantage of the very unusual properties of gelatin: gelation, very low viscosity, film mechanical properties and film solubility. Although the hard gelatin capsules present many advantages compared to other drug delivery systems, their uses are restricted because of the animal origin of the gelatin. A HPMC gelling agent system is currently used for producing animal product free hard capsules. This work examines the possibility of using a different system in a similar production process

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Salisbury, S. T. Samuel. "The mechanical properties of tendon." Thesis, University of Oxford, 2008. http://ora.ox.ac.uk/objects/uuid:97b73cf6-53bc-4606-b974-a1cdc662e9e8.

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Although the tensile mechanical properties of tendon have been well characterised, the viscoelastic and anisotropic properties remain uncertain. This thesis addresses the anisotropic and viscoelastic material properties of tendon. A method to characterise the three-dimensional shape of tendon is reported and experiments to characterise the fibre-aligned and fibre-transverse viscoelastic properties of tendon are presented. The cross-sectional profiles of bovine digital extensor tendons were determined by a laser-slice method. Linear dimensions were measured within 0.15 mm and cross-sectional ar

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McCullough, Kieran. "Mechanical properties of metallic foams." Thesis, University of Cambridge, 1999. https://www.repository.cam.ac.uk/handle/1810/272153.

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King, Raymond John. "Dynamic Mechanical Properties of Resilin." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/33677.

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Resilin is an almost perfect elastic protein found in many insects. It can be stretched up to 300% of its resting length and is not affected by creep or stress relaxation. While much is known about the static mechanical properties of resilin, it is most often used dynamically by insects. Unfortunately, the dynamic mechanical properties of resilin over the biologically relevant frequency range are unknown. Here, nearly pure samples of resilin were obtained from the dragonfly, Libellua luctuosa, and dynamic mechanical analysis was performed with a combination of time-temperature and time-conce

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Kappiyoor, Ravi. "Mechanical Properties of Elastomeric Proteins." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/54563.

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When we stretch and contract a rubber band a hundred times, we expect the rubber band to fail. Yet our heart stretches and contracts the same amount every two minutes, and does not fail. Why is that? What causes the significantly higher elasticity of certain molecules and the rigidity of others? Equally importantly, can we use this information to design materials for precise mechanical tasks? It is the aim of this dissertation to illuminate key aspects of the answer to these questions, while detailing the work that remains to be done. In this dissertation, particular emphasis is placed on the

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Bidasaria, Sanjay K. "Electronic and mechanical properties of." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/28101.

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Thesis (M. S.)--Physics, Georgia Institute of Technology, 2009.<br>Committee Chair: Marchenkov, Alexei; Committee Member: Callen, William Russell; Committee Member: First, Phillip; Committee Member: Kindermann, Marcus; Committee Member: Riedo, Elisa.

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Loveless, Thomas A. "Mechanical Properties of Kenaf Composites Using Dynamic Mechanical Analysis." DigitalCommons@USU, 2015. https://digitalcommons.usu.edu/etd/4310.

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Natural fibers show potential to replace glass fibers in thermoset and thermoplastic composites. Kenaf is a bast-type fiber with high specific strength and great potential to compete with glass fibers. In this research kenaf/epoxy composites were analyzed using Dynamic Mechanical Analysis (DMA). A three-point bend apparatus was used in the DMA testing. The samples were tested at 1 hertz, at a displacement of 10 μm, and at room temperature. The fiber volume content of the kenaf was varied from 20%-40% in 5% increments. Ten samples of each fiber volume fraction were manufactured and tested. The

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