Дисертації з теми "Structure strenght"
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Щукіна, Людмила Павлівна, Георгій Вікторович Лісачук, Ярослав Олегович Галушка, Олена Юріївна Федоренко та Лариса Олександрівна Міхеєнко. "Технологічна цінність промислових хімічних добавок при їх використанні у виробництві будівельної кераміки". Thesis, Одеський національний політехнічний університет, 2013. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31485.
Повний текст джерелаThe technological efficiency of complex surface-active additive "MasterCeram" using to improve the properties of ceramic masses and materials in the manufacture of wall ceramics is investigated. The water-reducing effect of the additive and its positive influence on the strength of the coagulation and condensation structure of ceramic masses are established. The optimal amount of additive, which recommended for use in the manufacture of terraced wall ceramic, are established.
Yang, Nana. "Structural strength and reliability analysis of composite structures." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=13242.
Повний текст джерелаCofer, William Franklin. "An analytical determination of ultimate strength of tubular joints for offshore structures." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/21494.
Повний текст джерелаRouaiguia, Ammar. "Strength of soil-structure interfaces." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/26883.
Повний текст джерелаPrandato, Emeline. "Relations structure-propriétés et résistance à l’endommagement de vernis acrylate photo-polymérisables pour substrats thermoplastiques : évaluation de monomères bio-sourcés et de nano-charges." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0103/document.
Повний текст джерелаThe aim of this work was to develop 100% solids photo-polymerizable acrylate coatings, intended to protect thermoplastic pieces made of polycarbonate against mechanical damage, in particular scratches. The relationships between the composition, the structure and the properties of these coatings were examined. For this purpose the morphology, the thermomechanical properties and the scratch resistance of the materials, assessed by micro-scratch tests, were studied. The kinetics of the polymer network formation was also studied by photo-DSC experiments. All the materials feature a high elastic modulus and a broad mechanical relaxation in dynamic thermomechanical analysis. A 100% solids petro-based coating (standard) constituted the starting point of this work. First it was compared to a commercial photo-polymerizable coating containing solvents, specially designed to protect thermoplastic pieces. This commercial coating turned out to be more efficient against scratches. In a second time was studied the influence of the percentage of a multicyclic monomer, taking part in the composition of the standard petro-based coating, on the properties of the latter. The modification of its proportion does not bring any advantage concerning the scratch resistance. Silica, alumina and zirconia nanoparticles, dispersed in an acrylate monomer, were then incorporated in the standard petro-based coating. A particular organization of the silica or alumina nanoparticles in the materials could be observed by transmission electron microscopy. A high filler content is required to observe an increase in the elastic modulus and an enhancement of the scratch resistance of the coating (≥15% by weight for the nano-silica). Moreover, no change of the photo-polymerization kinetics was noticed through the addition of 5% by weight of nano-silica in the coating. Finally, some of the petro-based acrylate compounds of the standard coating were substituted by commercially available bio-based acrylate monomers. Both types of coatings feature similar polymerization kinetics. The conclusions concerning the comparison of the scratch resistance of the bio-based and standard petro-based coatings depend on their thickness. The incorporation of a bio-based monoacrylate compound in low thickness coatings tends to improve the elastic recovery. Isobornyl acrylate is particularly interesting since it also tends to delay the apparition of cracks along the scratch
Moe, Heidi. "Strength analysis of net structures." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-5411.
Повний текст джерелаHou, An. "Strength of composite lattice structures." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/12475.
Повний текст джерелаMoreland, Angela. "The structure and strength of metallurgical coke." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/13759.
Повний текст джерелаAbbasi, Erfan. "Processing and structure of high strength steels." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/9466/.
Повний текст джерелаRobertson, I. "Strength loss in welded aluminium structures." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372908.
Повний текст джерелаHalabi, Walid Charif. "High Strength concrete corbels." Thesis, University of Aberdeen, 1991. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU047734.
Повний текст джерелаNezamian, Abolghasem 1968. "Bond strength of concrete plugs embedded in tubular steel piles." Monash University, Dept. of Civil Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/5601.
Повний текст джерелаUnderwood, J. "Strength assessment of damaged steel ship structures." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/355704/.
Повний текст джерелаAmador, Lui. "Strength within| Addressing Structural Opportunity Gaps for Men of Color at 4-Year Universities through a Strengths-Based Approach." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10825323.
Повний текст джерелаThe enrollment, retention, and graduation rates for African American, Latino, Native American, and segments of Asian and Pacific Islander men in higher education are disproportionately lower than women from all racial groups and White men. A significant body of research substantiates the concern by institutions on the opportunity gap for men of color in higher education. Despite the research and concerted efforts by institutions, this opportunity gap continues to affect the educational and overall college experience of men of color. Through qualitative interviews employing a photo elicitation protocol and a conceptual framework based on validation theory, Critical Race Theory (CRT) and Anti-Deficit Perspectives, this study examines the social, cultural, and institutional factors that shape this population’s experience in higher education. This research will examine the strengths and assets that men of color identify as supporting their success in college. This study will also examine how institutional resources and practices informed by an anti-deficit framework can effectively improve the experiences of men of color in school.
Sinclair, John. "Crusting, soil strength and seedling emergence in Botswana." Thesis, University of Aberdeen, 1985. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU363198.
Повний текст джерелаHaghi, Arsalan Khodaparast. "Shear strength characteristics of bog peat." Thesis, University of Salford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305924.
Повний текст джерелаBalart, Murria Maria Jose. "Structure-property relationships in high strength microalloyed forging steels." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364519.
Повний текст джерелаChoudhury, Ajmol H. "Structure, strength and defect characterisation of cement based materials." Thesis, Robert Gordon University, 2014. http://hdl.handle.net/10059/1031.
Повний текст джерелаOuakka, Slimane. "On the static strength of reinforced joints." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.
Знайти повний текст джерелаKultikova, Elena V. "Structure and Properties Relationships of Densified Wood." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/35810.
Повний текст джерелаSpecimens of both mature and juvenile southern pine (Pinus taeda) and yellow-poplar (Liriodendron tulipifera) were compressed radially at three different temperature, and moisture content conditions relevant to the glass transition of wood.
Ultimate tensile stress and longitudinal modulus of elasticity were obtained by testing compressed, uncompressed and control samples in tension parallel-to-grain. Strain measurements were performed using laboratory-built clip-on strain gauge transducers. Results of the tensile tests have shown an increase in the ultimate tensile stress and modulus of elasticity after all densification treatments.
Scanning electron microscopy was employed for observing changes in cellular structure of densified wood. Existence of the cell wall fractures was evaluated using image processing and analysis software. Changes in cellular structure were correlated with the results of the tensile test.
Chemical composition of wood samples before and after desorption experiments was determined by acid hydrolysis followed by high performance liquid chromatography (HPLC). The results of the chemical analysis of the wood specimens did not reveal significant changes in chemical composition of wood when subjected to 160 °C, pure steam for up to 8 hours.
The results of this research will provide information about modifications that occur during wood compression and will result in better understanding of material behavior during the manufacture of wood-based composites. In the long run, modification of wood with inadequate mechanical properties can have a significant effect on the wood products industry. Low density and juvenile wood can be used in new high-performance wood-based composite materials instead of old-growth timber.
Master of Science
Khurshid, Mansoor. "Static and fatigue analyses of welded steel structures : some aspects towards lightweight design." Doctoral thesis, KTH, Lättkonstruktioner, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200829.
Повний текст джерелаQC 20170206
Carroll, Travis S. "Predicted residual strength of damaged IsoTruss® structures /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1157.pdf.
Повний текст джерелаNyman, Tonny. "Fatigue and residual strength of composite aircraft structures." Doctoral thesis, KTH, Aeronautical Engineering, 1999. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2848.
Повний текст джерелаAlkhalil, M. F. S. "Strength of filament wound structures under complex stresses." Thesis, University of Manchester, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387260.
Повний текст джерелаCarroll, Travis S. "Predicted Redidual Strength of Damaged IsoTruss® Structures." BYU ScholarsArchive, 2005. https://scholarsarchive.byu.edu/etd/347.
Повний текст джерелаWang, Jie. "Behaviour and design of high strength steel structures." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/43758.
Повний текст джерелаRoumani, N. A. "The shear strength of prestressed brickwork sections." Thesis, University of Manchester, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374836.
Повний текст джерелаGambo, Abdullah Hadejia. "Finite element prediction of masonry shear strength." Thesis, University of Sussex, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315779.
Повний текст джерелаXue, Hongyu. "Structural behaviour of high strength concrete columns." Thesis, University of Westminster, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339246.
Повний текст джерелаBang, Won B. "Improving the strength of 3DP parts and development of controlled strength cellular structure investment casting shell." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38200.
Повний текст джерелаIncludes bibliographical references (p. 79).
Three Dimensional Printing (3DP) is a rapid prototyping process that creates a three dimensional part directly from computer models by printing a sequence of two dimensional layers. In this research, the strength of 3DP parts were improved by using different "print styles" (the way binder is deposited on the powder bed in creating a 3DP part) for use in investment casting process. The print styles that were created optimized line to line interaction between the printed lines, binder overlap, and the amount of unprinted powder surrounding the printed features. The strength of the parts are measured in three different axes (X-fast, Y-slow, Z). The strength improved by factors of 2, 8, and 7 for the three different axes. A controlled strength cellular structure investment casting shell that enables the creation of a metal part without any stress related defects has been created. The ceramic shell has an open cell frame structure with thin inner shell where the metal casting is poured. The flexibility of the 3DP technology applied to controlled strength cellular structure investment casting shell will incorporate all the advantages of 3DP to investment casting (Sach 1992, ASME) as well as reduction in material consumption, controlled heat transfer, permeability, and of course controlled strength to eliminate stress related defects. The cellular structure ceramic mold is designed to withstand the pouring pressures of the molten metal and survive the handling during processing yet fail when the stresses from the contracting metal becomes excessive. The 3DP molds are usually 60% porous and cellular structure investment casting shells consist of only 35% of the 3DP material per volume. A controlled strength cellular structure investment casting shell is designed to fail when excessive stress is applied to the shell structure. The stress on the casting shell is caused by the shrinkage of the metal part. The controlled strength investment casting shell has an open cellular structure frame with a thin inner shell where the metal casting will form.
by Won B. Bang.
S.M.
Farrell, Robert William. "Structural Features Related to Tree Crotch Strength." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/32619.
Повний текст джерелаMaster of Science
Amjad, Mohammed Amin Ben Abdul-Rauf. "Elasticity and strength of masonary, units and mortar." Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237248.
Повний текст джерелаChemrouk, Mohamed. "Slender concrete deep beams : behaviour, serviceability and strength." Thesis, University of Newcastle upon Tyne, 1988. http://hdl.handle.net/10443/3103.
Повний текст джерелаInegbenebor, A. O. "Structure-property relationships in some iron-manganese-molybdenum steels." Thesis, Bucks New University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380862.
Повний текст джерелаKhadka, Chandra. "PENALIZED REGRESSION MODELS FOR CONCRETE STRENGTH ESTIMATION." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/theses/2818.
Повний текст джерелаBull, Peter H. "Damage tolerance and residual strength of composite sandwich structures." Doctoral thesis, KTH, Aeronautical and Vehicle Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3757.
Повний текст джерелаThe exploitation of sandwich structures as a means toachieve high specific strength and stiffness is relatively new.Therefore, the knowledge of its damage tolerance is limitedcompared to other structural concepts such as truss bars andmonocoque plate solutions.
Several aspects of the damage tolerance of sandwichstructures are investigated. The influence of impact velocityonresidual strength is investigated. Sandwich panels withfaces of glass fiber reinforced vinylester are impacted bothwith very high velocity and quasi static. The residual strengthafter impact is found to be similar for both cases of impactvelocity.
Curved sandwich beams subjected to opening bending momentare studied. Faceñcore debonds of varying size areintroduced between the compressively loaded face sheet and thecore. Finite element analysis in combination with a pointstress criterion is utilized to predict the residual strengthof the beams. It is shown that it is possible to predict thefailure load of the beams with face-core debond.
Using fractography the governing mode of failure ofcompressively NCF-carbon is characterized. Sandwich panelssubjected to compression after impact are shown to fail byplastic micro buckling.
The residual compressive strength after impact of sandwichpanels is investigated. Sandwich panels with face sheets ofnon-crimp fabric (NCF) carbon are subjected to different typesof impact damages. Predictions of residual strength are madeusing the Budiansky, Soutis, Fleck (BSF) model. The residualstrength is tested, and the results are compared topredictions. Predictions and tests correlate well, and indicatethat the residual strength is dependent on damage size and notthe size of the damaged panel.
A study of the properties of a selection of fiberreinforcements commonly used in sandwich panels is conducted.The reinforcements are combined with two types of core materialand three types of matrix. Also the influence of laminatethickness is tested. Each combination materials is tested inuni-axial compression, compressive strength after impact andenergy absorption during quasi static indentation. Thespecimens which are tested for residual strength are eithersubjected to quasi-static or dynamic impact of comparableenergy level. Prediction of the residual strength is made andcorrelates reasonably whith the test results. The tests showthat if weight is taken into account the preferred choice offiber reinforcement is carbon.
Singh, Mandeep. "Construction technique and strength of connected regolith bag structures." Auburn, Ala., 2007. http://repo.lib.auburn.edu/2007%20Spring%20Theses/SINGH_MANDEEP_3.pdf.
Повний текст джерелаNaderi, Mahmood. "Assessing the strength and durability of repaired concrete structures." Thesis, Queen's University Belfast, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276362.
Повний текст джерелаMood, Geoffrey I. "Weaving thick three-dimensional structures with high strength fibres." Thesis, University of Ulster, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436203.
Повний текст джерелаBatt, C. "Optimising cathodic protection requirements for high strength steels in the marine environment." Thesis, Cranfield University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323886.
Повний текст джерелаJukes, Paul. "An investigation into the shear strength of masonry joints." Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.482074.
Повний текст джерелаDavison, John Buick. "Strength of beam-columns in flexibly connected steel frames." Thesis, University of Sheffield, 1987. http://etheses.whiterose.ac.uk/1866/.
Повний текст джерелаAshour, Ashraf Fawzy. "Behaviour and strength of reinforced concrete continuous deep beams." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319339.
Повний текст джерелаBarzegar, Abdolrahman. "Structural stability and mechanical strength of salt-affected soils." Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phb296.pdf.
Повний текст джерелаKolios, Athanasios. "A multi-configuration approach to reliability based structural integrity assessment for ultimate strength." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/5717.
Повний текст джерелаYi, Sŏk-wŏn. "Influence of surface topography on interface strength and counterface soil structure." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/19559.
Повний текст джерелаHe, Chunxia 1968. "Shear flow behavior and molecular structure of high melt strength polypropylenes." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84208.
Повний текст джерелаA method combining dynamic and creep measurements was employed to obtain a complete picture of the linear viscoelastic behavior of these polypropylenes. It was found that all samples in a set of polypropylenes have the same linear viscoelastic behavior in the high-frequency range, but display dramatic differences at low frequencies. Increasing branching level results in a steep increase of the zero-shear viscosity, an increase of the steady-state compliance, and a broadening of the relaxation spectrum whose shape changes dramatically and peaks shift to longer times.
Molecular models were tested and applied to the linear polypropylenes to predict linear viscoelastic properties from the molecular weight distribution (MWD). The parameters obtained from the best fit of predicted and experimental data of linear polypropylenes were used to calculate a fictive relaxation spectrum for branched polymers from their MWDs as if they were linear. The comparison between this predicted result and the experimental spectrum showed the separate effects of polydispersity and branching on rheology.
To obtain detailed structural information, the branching process of polypropylenes was simulated using a Monte-Carlo approach, which provides detailed information such as MWD and branching distribution. The simulated MWD was adjusted to the measured GPC curve using a single parameter simply related to the branching density lambda (LCB/1000C). Relations between branching parameters and moments of the MWD were determined, which offer the possibility to calculate branching parameters directly from GPC results. The branching efficiency was estimated and correlations between engineering properties of polypropylenes and the structural information were obtained, which is of valuable industrial interest for polymer design.
A determination of the weight fractions of branches and segments between branch points from the relaxation spectrum is proposed. Due to the complexity of molecular relaxation mechanisms, only approximate correlations between molecular architecture and rheology were observed.*
*This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Microsoft Office.
Gao, Xiao. "Tailored interphase structure for improved strength and energy absorption of composites." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 5.63 Mb., 321 p, 2006. http://proquest.umi.com/pqdlink?did=1172119431&Fmt=7&clientId=79356&RQT=309&VName=PQD.
Повний текст джерелаWilson, R. C. "Welded airframes : static strength, structural design and analysis." Thesis, Queen's University Belfast, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546430.
Повний текст джерелаFriis, Jesper. "Structural performance of confined high strength concrete columns." Thesis, City University London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397864.
Повний текст джерела