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Relevant bibliographies by topics / Plastic viscosity / Dissertations / Theses

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Dissertations / Theses on the topic 'Plastic viscosity'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Zengeni, Brian Tonderai. "Bingham yield stress and Bingham plastic viscosity of homogeneous Non-Newtonian slurries." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2458.

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Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2016.<br>This dissertation presents how material properties (solids densities, particle size distributions, particle shapes and concentration) of gold tailings slurries are related to their rheological parameters, which are yield stress and viscosity. In this particular case Bingham yield stresses and Bingham plastic viscosities. Predictive models were developed from analysing data in a slurry database to predict the Bingham yield stresses and Bingham plastic viscosities from their material properties. The overal

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2

Soualhi, Hamza. "Optimisation de la viscosité des bétons à faible impact environnemental." Thesis, Cergy-Pontoise, 2014. http://www.theses.fr/2014CERG0712.

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Il est possible de modifier la composition des bétons utilisés dans le domaine de la construction pour réduire sensiblement le dégagement de CO2 associé à leur fabrication. Ceci est obtenu en réduisant significativement la quantité de clinker et en incorporant des matériaux de substitution appelés additions. Elles sont généralement moins réactives et demandent, pour maintenir un niveau acceptable de performances mécaniques et de durabilité, une réduction importante du dosage en eau. C'est le cas des bétons à faible impact environnemental. L'utilisation de superplastifiant dans ces bétons perme

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3

Rizik, Vivian. "Analysis of an elasto-visco-plastic model describing dislocation dynamics." Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2505.

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Dans cette thèse on s'intéresse à l'analyse théorique et numérique de la dynamique des densités des dislocations, où les dislocations sont des défauts cristallins, apparaissant à l'échelle microscopique dans les alliages métalliques. En particulier, on considère en premier temps l'étude du modèle de Groma-Czikor-Zaiser (GCZ) et en second temps l'étude du modèle de Groma-Balog (GZ). Il s'agit en réalité d'un système d'équations de type paraboliques et de type Hamilton-Jacobi non-linéaires. Au départ, nous démontrons un résultat d'existence et d'unicité d'une solution régulière en utilisant le p

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4

Ganaw, Abdelhamed I. "Rheology of grout for preplaced aggregate concrete : investigation on the effect of different materials on the rheology of Portland cement based grouts and their role in the production of preplaced aggregate concrete." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5766.

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Preplaced aggregate concrete (PAC) is produced by grouting high workability cement based grouts among the voids of compacted coarse aggregate mass. Because of its low shrinkage, PAC has been used for many repair jobs like; tunnel lines, dams and bridge piers. Moreover, it has been used for underwater construction. Grout has a major effect on the properties of produced PAC and well defined grout controls the properties of resulted PAC. The effect of types and amount of powder materials, admixtures, sand and water content on the properties of fresh and hardened grout for the production of PAC ha

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5

Cai, Shaobiao. "3D numerical modeling of dry/wet contact mechanics for rough, multilayered elastic-plastic solid surfaces and effects of hydrophilicity/hydrophobicity during separation with applications." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1205118488.

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6

Boudreault, Mélanie. "Determination of zero-shear viscosity of molten polymers." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20496.

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Measuring the zero-shear viscosity of a molten polymer is not at all straightforward. Available rheometers are unable to operate at shear rates low enough to measure this important property, especially for polymers that have a very broad molecular weight distribution or a high degree of long chain branching. A new falling ball viscometer, the Magnetoviscometer (MVM), has recently been developed in Austria for the measurement of melt viscosity at very low shear rates. The primary objective of the research was to evaluate this instrument as a tool for the routine measurement of the zero-shear vi

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7

Silva, Neto Miguel Arcangelo da. "Constribui??o t?cnica de um sistema de emuls?o inversa a base de ?leos vegetais para fluidos de perfura??o." Universidade Federal do Rio Grande do Norte, 2002. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15775.

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Made available in DSpace on 2014-12-17T15:01:19Z (GMT). No. of bitstreams: 1 MiguelASN.pdf: 491289 bytes, checksum: be60500500779f6a3fd87b90108feb8c (MD5) Previous issue date: 2002-09-27<br>The developments in formulating drilling fluids to apply in petroleum fields are based on new technologies and environmental challenges, where the technical performance of a developed drilling fluid is used to produce a minimum environmental impact, showing great economy in costs. It is well known that the potential use of oil-based drilling fluids is limited because these fluids when discharged in the s

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8

CAPELLE, THIERRY. "Penetration libre dans les sediments marins : etude du comportement dynamique et rheologique d'une argile reconstituee." Toulouse 3, 1988. http://www.theses.fr/1988TOU30045.

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Etude de la penetration libre dans les sediments marins afin d'en evaluer les capacites de resistance au cisaillement ou pour determiner des profondeurs d'enfouissement maximales. Les phenomenes limitant l'enfouissement sont du a la portance et au frottement. On determine les proprietes rheologiques et dynamique de l'argile a partir d'une serie de tirs de projectiles effectues en fosse d'essais. L'etude du decelerogramme d'essai distingue les phases ou le comportement du sol au contact du penetreur varie depuis l'hydrodynamique jusqu'a la visco-plasticite

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9

Catti, Paolo. "Analisi sismiche di un edifico esistente in c.a.: progettazione di sistemi di dissipatori fluido-viscosi in presenza di escursione plastica di travi e pilastri." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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L’obbiettivo della tesi è quello di andare a contestualizzare il metodo "Direct Five Step Procedure" (DFSP) per la progettazione di un sistema di dissipatori fluido-viscosi in un adeguamento/miglioramento sismico di un edificio esistente ed integrando la procedura tenendo conto della capacità duttile della struttura. Per fare ciò si è preso in esame un edificio esistente situato a L’Aquila caratterizzato da un rapporto C/D (capacità/domanda) intorno a 0.2-0.3 così da rendere necessario l’accoppiamento di dissipazione viscosa tramite smorzatori e di dissipazione isteretica attraverso il dannegg

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10

Yingsheng, Xing. "Finite Element Analysis of Drop Deformation in the Entrance Region of a Cylindrical Tube." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1302535388.

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11

Lin, Kuan-Fu, and 林冠甫. "Rheological Theory and Modeling of Transient Shear Viscosity of Plastic Melts." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/vrz795.

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碩士<br>淡江大學<br>化學工程與材料工程學系碩士班<br>106<br>The main purpose of this research is to analyze the transient shear flow behavior of polymer materials in the molten state. The effects of two shear intervals, shear rate, and temperature on the transient viscosity (or stress increase) of the material were investigated, and attempts were made to quantify the time required for the recovery of the molecular structure of the viscoelastic fluid between two consecutive instant shearing. The material selected for this study is polycarbonate, which is a common thermoplastic engineering plastic with highimpact re

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12

Widjaja, Budijanto, and 倪金安. "Viscosity Determination of Soil in Plastic and Viscous Liquid States for Elucidating Mudflow Behavior." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/12117608586095841835.

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博士<br>國立臺灣科技大學<br>營建工程系<br>101<br>The transformation of soil from a plastic state into a viscous liquid state is primarily caused by changing the water content of the soil mass. As the water content increases, the soil mass gradually starts to behave like a viscous liquid. In spite of viscosity being a key parameter to the behavior of mudflows, there have no datasets of soil viscosity changes successfully measured continuously as they move from plastic to viscous liquid states. The aim of the current research is to design a new device to overcome this difficulty. Based on the trap door princip

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13

Ganaw, Abdelhamed I., and Ashraf F. Ashour. "Rheological properties of mortars prepared with different sands." 2014. http://hdl.handle.net/10454/7507.

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Yes<br>The principal aim of this paper is to investigate the effect of sand grading, surface morphology, and content on the rheological properties—that is, yield stress and plastic viscosity—of fresh mortar. Mortars were produced from four different types of sand at two volumetric cement-sand ratios of 1/0.9 and 1/0.6. Each blend was prepared with five water-cement ratios of 0.60, 0.55, 0.50, 0.45, and 0.40. The rheometer was used to determine yield stress and plastic viscosity parameters of each cement paste and mortar. Test results show that the relative yield stress and plastic viscosity of

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14

"Time Dependent Rheological Response of Composite Binders." Master's thesis, 2016. http://hdl.handle.net/2286/R.I.38398.

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abstract: The need for sustainability in construction has encouraged scientists to develop novel environmentally friendly materials. The use of supplementary cementitious materials was one such initiative which aided in enhancing the fresh and hardened concrete properties. This thesis aims to explore the understanding of the early age rheological properties of such cementitious systems. The first phase of the work investigates the influence of supplementary cementitious materials (SCM) in combination with ordinary Portland cement (OPC) on the rheological properties of fresh paste with and wit

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15

Jang, Se Hoon. "Identification of Concrete Incompatibilities Using Cement Paste Rheology." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-05-349.

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The complex interaction between cement and chemical/mineral admixtures in concrete mixtures sometimes leads to unpredictable concrete performance in the field which is generally defined as concrete incompatibilities. Cement paste rheology measurements instead of traditional workability tests (i.e., slump cone test) can have great potential in detecting those incompatibilities in concrete before the concrete is placed, which can, in turn, avoid related workability problems and setting time as well as heat evolution abnormalities. The objectives of the present study were to examine the applicabi

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16

Liu, Y., H. Cao, L. Ye, Philip D. Coates, Philip D. Caton-Rose, and X. Zhao. "Long-chain branched poly(lactic acid)- b-poly(lactide- co-caprolactone): Structure, viscoelastic behavior, and triple-shape memory effect as smart bone fixation material." 2020. http://hdl.handle.net/10454/18311.

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Yes<br>A novel fully biosbased poly(lactic acid)-b-poly(lactide-co-caprolactone) (PLA-b-PLCL) with a two-phase structure and long-chain branches was specifically designed and prepared through reactive melt processing. The results showed that PLCL segments were introduced onto PLA chains successfully. With the increase of PLCL content, the blockier distribution of LA/CL chain sequences of the sample was exhibited. PLA-b-PLCL showed two distinct thermal transitions, corresponding to the glass transition of PLA and PLCL domains, respectively, whereas the phase morphology changed from a sea-island

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