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Letteratura scientifica selezionata sul tema "Mechanical properties"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 12 ottobre 2024

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Articoli di riviste sul tema "Mechanical properties"

Sakamoto, Makoto, Kenji Sato, Koichi Kobayashi, Jun Sakai, Yuji Tanabe e Toshiaki Hara. "Nanoindentation Analysis of Mechanical Properties of Cortical Bone(Bone Mechanics)". Proceedings of the Asian Pacific Conference on Biomechanics : emerging science and technology in biomechanics 2004.1 (2004): 43–44. http://dx.doi.org/10.1299/jsmeapbio.2004.1.43.

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Gotoh, Masaru, Ken Suzuki e Hideo Miura. "OS12-4 Control of Mechanical Properties of Micro Electroplated Copper Interconnections(Mechanical properties of nano- and micro-materials-1,OS12 Mechanical properties of nano- and micro-materials,MICRO AND NANO MECHANICS)". Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2015.14 (2015): 186. http://dx.doi.org/10.1299/jsmeatem.2015.14.186.

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Dunca, J. "Mechanical properties of cereal stem". Research in Agricultural Engineering 54, No. 2 (24 giugno 2008): 91–96. http://dx.doi.org/10.17221/5/2008-rae.

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The paper deals with the measurement of the resonance frequencies of wheat stems with special respect to different wheat varieties. For the measurement, the dynamical method of the transverse frequency was used. Formulas were derived for the calculation of the bending toughness of stems. The <I>t</I>-test was used for the evaluation of the strength coefficient in bending for the samples of stems of different wheat varieties. The results can be used for the evaluation of the wheat resistance to lodging.

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Arak, Margus, Kaarel Soots, Marge Starast e Jüri Olt. "Mechanical properties of blueberry stems". Research in Agricultural Engineering 64, No. 4 (31 dicembre 2018): 202–8. http://dx.doi.org/10.17221/90/2017-rae.

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In order to model and optimise the structural parameters of the working parts of agricultural machines, including harvesting machines, the mechanical properties of the culture harvested must be known. The purpose of this article is to determine the mechanical properties of the blueberry plant’s stem; more precisely the tensile strength and consequent elastic modulus E. In order to achieve this goal, the measuring instrument Instron 5969L2610 was used and accompanying software BlueHill 3 was used for analysing the test results. The tested blueberry plant’s stems were collected from the blueberry plantation of the Farm Marjasoo. The diameters of the stems were measured, test units were prepared, tensile tests were performed, tensile strength was determined and the elastic modulus was obtained. Average value of the elastic modulus of the blueberry (Northblue) plant’s stem remained in the range of 1268.27–1297.73 MPa.

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Kiselov, V. S. "Mechanical properties of biomorphous ceramics". Semiconductor Physics Quantum Electronics and Optoelectronics 15, n. 4 (12 dicembre 2012): 386–92. http://dx.doi.org/10.15407/spqeo15.04.386.

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Namazu, Takahiro. "OS12-1 MEMS and Nanotechnology for Experimental Mechanics(invited,Mechanical properties of nano- and micro-materials-1,OS12 Mechanical properties of nano- and micro-materials,MICRO AND NANO MECHANICS)". Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2015.14 (2015): 183. http://dx.doi.org/10.1299/jsmeatem.2015.14.183.

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Kubík, Ľ., e V. Kažimírová. "Mechanical properties of pellets in compression". Research in Agricultural Engineering 61, Special Issue (2 giugno 2016): S1—S8. http://dx.doi.org/10.17221/17/2015-rae.

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The paper deals with the evaluation of mechanical properties of the cylinder pellet samples. The pellets were made from hay by the granulating machine MGL 200 (Kovonovak) provided by the Department of Production Engineering, Slovak University of Agriculture in Nitra. The pellets were submitted to compressive loading. The compressive loading curves of dependencies of force on strain and force on time were realised by the test stand Andilog Stentor 1000. Certain mechanical parameters were determined, namely the diameter of the sample, length of the sample, force at 10% of strain, force in the first maximum of the force – strain curve, strain in the first maximum of the force – strain curve, modulus of elasticity, force in the inflex point of the force – time and force – strain curves and strain and stress in the inflex point of the force – time and force – strain curves. Significant correlations of the mechanical parameters were observed between the inflex point and the first maximum point of the loading curves. There were find out, the compression force, stress and strain in the inflex point significantly correlate with the force, stress and strain in the first maximum.

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Han, Zhong Kai, Ming Liu e Yin Jun Gao. "Mechanical Properties of Stone Masonry Mechanical Properties". Applied Mechanics and Materials 507 (gennaio 2014): 277–80. http://dx.doi.org/10.4028/www.scientific.net/amm.507.277.

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The research presented the mechanical properties under compressive loads of a natural stone masonry. The characterization of the basic materials and different stone masonry prisms are included. Sandstone and low strength limecement mortar were used for this experimental work. The morphological characteristics of walls were also taken into account, in order to manufacture prism specimens that were as representative as possible of the Chinese typology. The experimental values were compared with the analytical in different masonry.

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Skalický, J. "Research of sugar-beet tubers mechanical properties". Research in Agricultural Engineering 49, No. 3 (8 febbraio 2012): 80–84. http://dx.doi.org/10.17221/4956-rae.

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Approach to the problems of sugar-beet tubers surface damage dependence on harvesting technology. Investigation of sugar-beet tubers damage when falling on wood and iron surfaces and in the next case tuber damage caused by their fall on the tuber heap. Research of damage rate dependence on the fall height. Evaluation of damage rate was carried by the I.I.R.B. method (method used by all sugar-beet growing countries of Western Europe). The results refer that no considerable differences in damage rate after the fall on the wood or iron bottoms have been ascertained. The height of 1.5 m can be considered in all cases as the limit value of the tubers fall, when share of heavily damaged tubers reached acceptable values of 10–15%, but that the share increases significantly at higher falling height. The lifting bodies construction requires also a knowledge of dependence between root depth and force for tuber release from soil in relation to the tuber weight. Medium force needed for tubers lifting ranges from 17 to 27 kp, maximum value 50 kp was found out for tubers of weight above 3 kg.

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Wiwatwongwana, F., e S. Chaijit. "Mechanical Properties Analysis of Gelatin/Carboxymethylcellulose Scaffolds". International Journal of Materials, Mechanics and Manufacturing 7, n. 3 (giugno 2019): 138–43. http://dx.doi.org/10.18178/ijmmm.2019.7.3.447.

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Tesi sul tema "Mechanical properties"

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 hétérogénéités dynamiques accélère la dynamique locale. On observe contraintes ultimes de quelques dizaines de MPa à quelques pourcents de déformation et que la plastification est due à un nombre relativement petit d'événements locaux. Il a été observé que la dynamique devient plus rapide et homogène dans le régime plastique et que la mobilité moyenne atteint une valeur stationnaire, linéaire avec le taux de déformation. Nous proposons que la contrainte locale stimule la diffusion de monomères des domaines lents à ceux rapides (mécanisme de facilitation) et accélère dynamique locale. Ceci permets d'observer l'homogénéisation de la dynamique, avec des caractéristiques proches de l'expérience. L'écrouissage, dans les polymères enchevêtrés ou réticulés. A grande déformation, la contrainte augmente avec une pente caractéristique d'ordre 10 – 100 MPa au-dessous de la transition vitreuse. De manière analogue à une théorie récente, nous proposons que la déformation locale oriente les monomères dans la direction d'étirage et ralentie la dynamique, suite à l'intensification des interactions locales. Les modules d'écrouissage mesurés, les effets de la réticulation et du taux de déformation sont comparables aux données expérimentales. En outre, on trouve que l'écrouissage a un effet stabilisateur sur les phénomènes de localisation et sur les bandes de cisaillement
This manuscript presents recent extensions to the PFVD model, based on the heterogeneity of theh dynamics of glassy polymers at the scale of a few nanometers et solved by 3D numerical simulation, which aim at providing a unified physical description of the mechanical and dynamical properties of glassy polymers during plastic deformation. Three main topics are treated: Plasticization. Under applied deformation, polymers undergo yield at strains of a few percent and stresses of some 10 MPa.We propose that the elastic energy stored at the scale of dynamical heterogeneities accelerates local dynamics. We observe yield stresses of a few 10 MPa are obtained at a few percent of deformation and that plastification is due to a relatively small amount of local yields. It has been observed that dynamics becomes faster and more homogeneous close to yield and that the average mobility attains a stationary value, linear with the strain rate. We propose that stress-induced acceleration of the dynamics enhances the diffusion of monomers from slow domains to fast ones (facilitation mechanism), accelerating local dynamics. This allows for obtaining the homogeneisation of the dynamics, with the same features observed during experiments. Strain-hardening, in highly entangled and cross-linked polymers. At large strain, stress increases with increasing strain, with a characteristic slope (hardening modulus) of order 10 – 100 MPa well below the glass transition. Analogously to a recent theory, we propose that local deformation orients monomers in the drawing direction and slows dows the dynamics, as a consequence of the intensification of local interactions. The hardening moduli mesured, the effect of reticulation and of strain rate are comparable with experimental data. In addition, strain-hardening is found to have a stabilizing effect over strain localization and shear banding

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Guillou, Lionel. "Cell Mechanics : Mechanical Properties and Membrane Rupture Criteria". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX041/document.

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L’athérosclérose est une maladie artérielle chronique qui est une des causes majeures d’accidents vasculaires cérébraux et de crises cardiaques. Cette thèse a pour objectif de mieux comprendre certains facteurs spécifiques impliqués dans le dévelopement de cette maladie en abordant cette problématique sous l’angle de la mécanique.Deux types de cellules qui jouent un rôle important dans le dévelopement et la progression de l’athérosclérose sont les cellules endothéliales adhérentes et les leucocytes non-adhérents (les globules blancs). Nous avons développé deux systèmes capables de mesurer les propriétés mécaniques de ces deux grands types cellulaires. Le premier, appelé “indentation de profil”, utilise des micropipettes et des microindenteurs pour indenter la cellule, tandis que le second utilise la microfluidique pour soumettre les cellules à une contrainte d’élongation.De plus, nous nous sommes demandé si la mécanique pouvait nous aider à comprendre quand les déformations des cellules, ou les contraintes exercées sur elles, pouvaient les endommager.En effet, lorsque les plaques d’athérosclérose obstruent une partie trop grande du flux sanguin, le traitement le plus courant consiste à rouvrir le vaisseau avec un ballon et à le maintenir ouvert au moyen d’une endoprothèse artérielle, qui est un petit dispositif maillé et tubulaire. Cette procédure exerce des contraintes de compression considérables sur l’endothélium et l’endommage. Nous avons donc cherché à trouver un critère physique prédictif de la rupture de la membrane des cellules endothéliales en compression, puis avons comparé cela aux contraintes exercées sur l’endothélium durant la pose d’une endoprothèse artérielle, afin de voir si les dommages faits à l’endothélium pouvaient potentiellement être évités.De façon similaire, nous avons cherché à obtenir un critère physique prédictif de la rupture de la membrane des leucocytes. Nous avons ensuite comparé les déformations maximales possibles des leucocytes selon que ces déformations soient passives (comme lors du passage dans la microvasculature) ou actives (comme lors de la traversée de l’endothélium par les leucocytes)
Atherosclerosis is a chronic disease of the arteries that is a major cause of heart attacks and strokes. This thesis aims to provide novel insight into this disease by looking at specific factors involved in its development from a mechanical standpoint.Two important cell types involved in the development and progression of atherosclerosis are adherent endothelial cells and non-adherent leukocytes (white blood cells). We developed two devices that are able to measure the mechanical properties of both of these cell types. The first one, termed “profile microindentation”, uses micropipettes and microindenters to indent the cell, while the second one uses microfluidics to submit cells to an extensional stress.Further, we wondered if mechanics could help us understand when deformations undergone by cells, or stresses exerted on them, could become harmful.As a matter of fact, when atherosclerotic plaques occlude too much of the blood flow, the most common treatment consists of reopening the vessel with a balloon and keeping it open with a tubular wired mesh called a stent. This procedure exerts considerable compressive stress on the endothelium and is known to be associated with extensive endothelial damage. Hence, we seek to find a physical criterion that is predictive of endothelial cell membrane rupture under compression and to compare this to the stress exerted on the endothelium during the stenting procedure, to see if endothelial damage could potentially be avoided.Similarly, we seek to obtain a physical criterion that is predictive of leukocyte membrane rupture. We then compare and contrast the maximum possible deformations of leukocytes depending on whether those deformations are passive (such as when going through the microvasculature) or active (such as when leukocytes traverse the endothelial barrier)

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Miao, Yuyang. "Mechanics of textile composites : from geometry to mechanical properties /". Search for this dissertation online, 2005. http://wwwlib.umi.com/cr/ksu/main.

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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 flexural storage modulus, the flexural loss modulus, and the loss factor were reported. Generally as the fiber volume fraction of kenaf increased, the flexural storage and flexural loss modulus increased. The loss factor remained relatively constant with increasing fiber volume fraction. Woven and chopped fiberglass/epoxy composites were manufactured and tested to be compared with the kanaf/epoxy composites were manufactured and tested to be compared with the kenaf/epoxy composites. Both of the fiberglass/epoxy composites reported higher flexural storage and flexural loss modulus values. The kenaf/epoxy composites reported higher loss factor values. The specific flexural storage and specific flexural loss modulus were calculated for both the fiberglass and kenaf fiber composites. Even though the kenaf composites reported a lower density, the fiberglass composites reported higher specific mechanical properties.

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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 strength capacities of CFRP anchor dowels are measured. The effects of concrete compressive strength, anchorage depth, anchorage diameter, and number of fibers on the tensile strength capacity of CFRP anchor dowel are studied.

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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 context of steels, although the outcomes may be more widely applied. The approach used relies on the creation of physically meaningful models based on the neural network and genetic programming techniques. It appears that the hot-strength, of ferritic steels used in the powerplant industry, diminishes in concert with the dependence of solid solution strengthening on temperature, until a critical temperature is reached where it is believed that climb processes begin to contribute. It is demonstrated that in this latter regime, the slope of the hot-strength versus temperature plot is identical to that of creep rupture-strength versus temperature. This significant outcome can help dramatically reduce the requirement for expensive creep testing. Similarly, a model created to estimate the fatigue crack growth rates for a wide range of ferritic and austenitic steels on the basis of static mechanical data has the remarkable outcome that it applies without modification to nickel based superalloys and titanium alloys. It has therefore been possible to estimate blindly the fatigue performance of alloys whose chemical composition is not known. Residual stress is a very complex phenomenon especially in bearings due to the Hertzian contact which takes place. A model has been developed that is able to quantify the residual stress distribution, under the raceway of martensitic ball bearings, using the running conditions. It is evident that a well-formulated neural network model can not only be extrapolated even beyond material type, but can reveal physical relationships which are found to be informative and useful in practice.

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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. The gauge calibration procedure was critically evaluated; the necessity of dispersion correction was investigated; and a method for allowing for the finite specimen transit time was introduced. Chapter 4 presents a comparison of methods of estimating a high strain-rate elastic modulus, including ultrasonic and pulse-shaped SHPB measurements. All methods returned moduli within the expected range and in broad agreement with each other. Chapter 5 describes SHPB and ultrasonic transducer experiments performed on a UK PBX and binder at temperatures ranging from -100�C to 30�C. Results build upon and agree with published findings, demonstrating a lower glass transition temperature in the binder than in the PBX, implying that the binder in the PBX experiences a higher strain-rate. Chapter 6 reports experiments performed on three cast RDX-HTPB composites, where quantifiable damage was introduced at high strain-rate using a Direct Impact Hopkinson Bar, and the resulting composite modulus was measured quasi-statically. The most abrupt decrease in modulus due to damage was measured for the composite containing bimodally distributed filler particles. Finally, in chapter 7, two sets of sugar-HTPB composites were produced: one with fixed particle size distribution with varying particle separation, and the other vice-versa. Microstructural properties, including the distribution of intergranular separations, were measured using X-ray microtomography. Quasi-static and SHPB compression experiments were performed. Particle size and separation were found to be secondary to fill-fraction in governing material properties. A Porter-Gould modulus decay function was fitted to the stress-strain curves. The binder elastic modulus and crystal-binder adhesion energy were estimated at high and low strain-rates.

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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 tested in a specially designed tensile tester in order to determine the stress-strain relationship of the specimen. The stress-strain relationship of the cartilage test specimens was found to be linear up to approximately 10 % strain. However, irreversible disruption of the cartilage matrix occurred at strains greater than 10 %. The tensile stiffness of the tracheal cartilage fell in the range 1-20 MPa and was found to decrease with increasing depth from the outer surface of the tissue. This layer-wise variation in tensile stiffness reflected the orientation of the collagen fibrils in the tissue. An age-related increase in the tensile stiffness of tracheal cartilage was found. This age-related change in tensile stiffness may reflect an increase in collagen cross-linking in specimens from older individuals. A possible bias of the test method toward the measurement of the mechanical properties of the collagen fibrils, as opposed the combined effects of the collagen and proteoglycans, was suspected. However, to the extent that equilibrium tensile testing reflects the ability of tracheal cartilage to bend in response to alterations in transmural pressure, these results suggest that age-related changes in large airway cartilage stiffness are not the cause of the age-related decrease in maximal expiratory flow.
Applied Science, Faculty of
Chemical and Biological Engineering, Department of
Graduate

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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 for artificial snow.A survey of current state of the art knowledge of properties for natural snow was done andbasic material properties for different qualities of artificial snow were investigated. Strengthand deformation properties for artificial snow were evaluated through uniaxial compressivetests where cylindrical test specimens were subjected to different constant deformation rates.The results show that artificial snow at low deformation rates will have a plastic deformationbehavior where the initial deformation will cause a hardening of the snow structure. At higherdeformation rates brittle failure may occur. For artificial snow with a homogeneous and finegrained structure the deformation behavior was found to change from plasticity to brittleness ata certain critical deformation rate. Artificial snow with coarse grained structure was found to bebrittle giving unstructured results independent of the load level.Four point loading was applied on beams of artificial snow to study creep deformation, bendingstrength and to determine the ultimate load for the different snow qualities. The results showedcoarse grained artificial snow underwent relatively small creep deformations. Both the creepbehavior and the ultimate strength varied randomly at the same applied load. Large plasticdeformations were observed with the fine grained artificial without any failure of the beams.The ultimate load was relatively high and repeatable results were achieved for all test.Previous presumptions that coarse grained artificial snow with high density would have highstrength and were not confirmed by the experiments performed on different qualities ofartificial snow. The performed tests indicate that fine grained artificial snow of lower densityhave more predictable strength properties of equally high or higher magnitude as for coarsegrained artificial snow. The plastic deformations were however higher for the fine grainedartificial snow. High deformations are not favorable for structures which should maintain theshape during the winter season. When designing constructions of snow both strength anddeformation properties should be taken into account.
Godkänd; 2013; 20131002 (ninlin); Tillkännagivande licentiatseminarium 2013-10-23 Nedanstående person kommer att hålla licentiatseminarium för avläggande av teknologie licentiatexamen. Namn: Nina Lintzén Ämne: Geoteknik/Soil Mechanics and Foundation Engineering Uppsats: Mechanical Properties of Artificial Snow Examinator: Professor Sven Knutsson, Institutionen för samhällsbyggnad och naturresurser, Luleå tekniska universitet Diskutant: Tekn. lic. Lars Vikström, LKAB, Luleå Tid: Fredag den 15 november 2013 kl 10.00 Plats: F1031, Luleå tekniska universitet

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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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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 semiconductors through the development and experimental-validation of computational methods for mechanical simulation. A predictive computational methodology is designed and encapsulated into open-sourced software for automating molecular dynamics simulations on modern supercomputing hardware. These simulations are used to explore the role of molecular structure/weight and processing conditions on solid-state morphology and thermomechanical behavior. Experimental characterization is employed to test these predictions—including the development of simple, new techniques for rigorously characterizing thermal transitions and fracture mechanics of thin films.

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Più fonti

Libri sul tema "Mechanical properties"

Kambic, HE, e AT Yokobori, a cura di. Biomaterials' Mechanical Properties. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1994. http://dx.doi.org/10.1520/stp1173-eb.

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E, Kambic Helen, Yokobori A. Toshimitsu 1951- e American Society for Testing and Materials., a cura di. Biomaterials' mechanical properties. Philadelphia, PA: ASTM, 1994.

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Janssen, Jules J. A. Mechanical properties of bamboo. Dordrecht: Kluwer Academic Publishers, 1991.

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Pelleg, Joshua. Mechanical Properties of Nanomaterials. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-74652-0.

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Pelleg, Joshua. Mechanical Properties of Materials. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-4342-7.

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Pelleg, Joshua. Mechanical Properties of Ceramics. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04492-7.

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Janssen, Jules J. A. Mechanical Properties of Bamboo. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3236-7.

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Pelleg, Joshua. Mechanical Properties of Materials. Dordrecht: Springer Netherlands, 2013.

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Janssen, Jules J. A. Mechanical Properties of Bamboo. Dordrecht: Springer Netherlands, 1991.

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Wachtman, J. B. Mechanical properties of ceramics. 2^a ed. Hoboken, N.J: Wiley, 2008.

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Capitoli di libri sul tema "Mechanical properties"

Perego, Gabriele, e Gian Domenico Cella. "Mechanical Properties". In Poly(Lactic Acid), 141–53. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470649848.ch11.

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Lü, L., e M. O. Lai. "Mechanical Properties". In Mechanical Alloying, 189–201. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5509-4_7.

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Lacroix, Damien, e Josep A. Planell. "Mechanical Properties". In Biomedical Materials, 303–36. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-49206-9_8.

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Wesolowski, Robert A., Anthony P. Wesolowski e Roumiana S. Petrova. "Mechanical Properties". In The World of Materials, 39–47. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-17847-5_6.

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Benboudjema, Farid, Jérôme Carette, Brice Delsaute, Tulio Honorio de Faria, Agnieszka Knoppik, Laurie Lacarrière, Anne Neiry de Mendonça Lopes, Pierre Rossi e Stéphanie Staquet. "Mechanical Properties". In Thermal Cracking of Massive Concrete Structures, 69–114. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76617-1_4.

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Desnerck, Pieter, Veerle Boel, Bart Craeye e Petra Van Itterbeeck. "Mechanical Properties". In Mechanical Properties of Self-Compacting Concrete, 15–71. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-03245-0_2.

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Young, Robert J., e Peter A. Lovell. "Mechanical properties". In Introduction to Polymers, 310–428. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4899-3176-4_5.

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Feuerbacher, M., K. Urban, Ulrich Messerschmidt, Martin Bartsch, Bert Geyer, Lars Ledig, Christoph Rudhart et al. "Mechanical Properties". In Quasicrystals, 431–569. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527606572.ch5.

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Rice, Roy. "Mechanical Properties". In Cellular Ceramics, 289–312. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527606696.ch4a.

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Hack, Robert. "Mechanical Properties". In Encyclopedia of Earth Sciences Series, 1–16. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-12127-7_197-1.

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Atti di convegni sul tema "Mechanical properties"

Cleland, A. N. "Mechanical quantum resonators". In ELECTRONIC PROPERTIES OF NOVEL NANOSTRUCTURES: XIX International Winterschool/Euroconference on Electronic Properties of Novel Materials. AIP, 2005. http://dx.doi.org/10.1063/1.2103895.

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Baum, Gary A. "Subfracture Mechanical Properties". In Products of Papermaking, a cura di C. F. Baker. Fundamental Research Committee (FRC), Manchester, 1993. http://dx.doi.org/10.15376/frc.1993.1.1.

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Abstract (sommario):

Virtually all paper and board grades have one or more mechanical property specifications. These are typically fracture properties, but the subfracture mechanical properties are also important. In many situations raw material and papermaking variables impact subfracture and fracture properties in similar and predictable ways. In this review we discuss the impact of fiber and paper machine variables on the mechanical properties of paper and board up to the point of failure. As with any real material, the physical properties (mechanical, optical, electrical, etc.) are not independent but depend upon the constituents and structure of the material. We discuss these connections where appropriate. From a historical perspective, those “turning points” that led us to greater understanding of the mechanical properties are pointed out, as are situations where work is needed.

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Williamson, David. "Mechanical Properties of PBS9501". In SHOCK COMPRESSION OF CONDENSED MATTER - 2003: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2004. http://dx.doi.org/10.1063/1.1780362.

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Polyakov, Maxim, e Peter Schweitzer. "Mechanical properties of particles". In 23rd International Spin Physics Symposium. Trieste, Italy: Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.346.0066.

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Kaplan-Ashiri, I. "Mechanical Properties of Individual WS2 Nanotubes". In ELECTRIC PROPERTIES OF SYNTHETIC NANOSTRUCTURES: XVII International Winterschool/Euroconference on Electronic Properties of Novel Materials. AIP, 2004. http://dx.doi.org/10.1063/1.1812096.

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Niesz, K. "Mechanical cut of carbon nanotubes". In STRUCTURAL AND ELECTRONIC PROPERTIES OF MOLECULAR NANOSTRUCTURES: XVI International Winterschool on Electronic Properties of Novel Materials. AIP, 2002. http://dx.doi.org/10.1063/1.1514083.

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Najidha, S., P. Predeep, N. S. Saxena, P. Predeep, S. Prasanth e A. S. Prasad. "Dynamic Mechanical Properties of Natural Rubber∕Polyaniline Composites". In THERMOPHYSICAL PROPERTIES OF MATERIALS AND DEVICES: IVth National Conference on Thermophysical Properties - NCTP'07. AIP, 2008. http://dx.doi.org/10.1063/1.2927564.

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Dixit, Manasvi, Vinodini Shaktawat, Kananbala Sharma, Narendra S. Saxena, Thaneshwar P. Sharma, P. Predeep, S. Prasanth e A. S. Prasad. "Mechanical Characterization of Polymethyl Methacrylate and Polycarbonate Blends". In THERMOPHYSICAL PROPERTIES OF MATERIALS AND DEVICES: IVth National Conference on Thermophysical Properties - NCTP'07. AIP, 2008. http://dx.doi.org/10.1063/1.2927574.

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Saxena, Narendra S., Neeraj Jain, P. Predeep, S. Prasanth e A. S. Prasad. "Thermal and Mechanical Characterization of Aniline-Formaldehyde Copolymer". In THERMOPHYSICAL PROPERTIES OF MATERIALS AND DEVICES: IVth National Conference on Thermophysical Properties - NCTP'07. AIP, 2008. http://dx.doi.org/10.1063/1.2927593.

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"Mechanical Properties of Plain AAC Material". In SP-226: Autoclaved Aerated Concrete-Properties and Structural Design. American Concrete Institute, 2005. http://dx.doi.org/10.14359/14388.

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Rapporti di organizzazioni sul tema "Mechanical properties"

Caskey, Jr, G. R. Mechanical Properties of Uranium Alloys. Office of Scientific and Technical Information (OSTI), ottobre 2002. http://dx.doi.org/10.2172/804673.

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Luecke, William E., J. David McColskey, Christopher N. McCowan, Stephen W. Banovic, Richard J. Fields, Timothy Foecke, Thomas A. Siewert e Frank W. Gayle. Mechanical properties of structural steel. Gaithersburg, MD: National Institute of Standards and Technology, 2005. http://dx.doi.org/10.6028/nist.ncstar.1-3d.

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Siegel, R. W., e G. E. Fougere. Mechanical properties of nanophase materials. Office of Scientific and Technical Information (OSTI), novembre 1993. http://dx.doi.org/10.2172/10110297.

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Solem, J. C., e J. K. Dienes. Mechanical Properties of Cellular Materials. Office of Scientific and Technical Information (OSTI), luglio 1999. http://dx.doi.org/10.2172/759178.

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Wallace, J. S., E. R. Jr Fuller e S. W. Freiman. Mechanical properties of aluminum nitride substrates. Gaithersburg, MD: National Institute of Standards and Technology, 1996. http://dx.doi.org/10.6028/nist.ir.5903.

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McEachen, G. W. Carbon syntactic foam mechanical properties testing. Office of Scientific and Technical Information (OSTI), gennaio 1998. http://dx.doi.org/10.2172/654103.

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Neuman, A. D., M. J. Blacic, M. Platero, R. S. Romero, K. J. McClellan e J. J. Petrovic. Mechanical properties of melt-derived erbium oxide. Office of Scientific and Technical Information (OSTI), dicembre 1998. http://dx.doi.org/10.2172/296753.

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Klueh, R. L., D. J. Alexander e M. Rieth. Mechanical properties of irradiated 9Cr-2WVTa steel. Office of Scientific and Technical Information (OSTI), settembre 1998. http://dx.doi.org/10.2172/330624.

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McCoy, H. E., e J. F. King. Mechanical properties of Inconel 617 and 618. Office of Scientific and Technical Information (OSTI), febbraio 1985. http://dx.doi.org/10.2172/711763.

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Switzner, Nathan T. Stainless Steel Microstructure and Mechanical Properties Evaluation. Office of Scientific and Technical Information (OSTI), giugno 2010. http://dx.doi.org/10.2172/1129927.

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