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Rozprawy doktorskie na temat „Cyclic model”

Autor: Grafiati
Data publikacji: 3 czerwca 2025
Data aktualizacji: 31 lipca 2025

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1

Kim, Se-Hyung. "Cyclic Uniaxial Constitutive Model For Steel Reinforcement." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51241.

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Reinforced Concrete (RC) structures are common in earthquake-prone areas. During an earthquake, the steel reinforcement is subjected to cyclic strain histories which lead to inelastic response. In the case of rare, strong earthquakes, inelastic buckling and even rupture due to low-cycle fatigue can also occur. The understanding and characterization of the performance of RC structures under earthquake hazards requires the accurate simulation of the inelastic hysteretic behavior of steel reinforcement by means of appropriate constitutive models. Several uniaxial material models have been develo
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Wang, Xiaoning. "A Modular Model Checking Algorithm for Cyclic Feature Compositions." Digital WPI, 2005. https://digitalcommons.wpi.edu/etd-theses/64.

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Feature-oriented software architecture is a way of organizing code around the features that the program provides instead of the program's objects and components. In the development of a feature-oriented software system, the developers, supplied with a set of features, select and organize features to construct the desired system. This approach, by better aligning the implementation of a system with the external view of users, is believed to have many potential benefits such as feature reuse and easy maintenance. However, there are challenges in the formal verification of feature-oriented system
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Wang, Xiaoning. "A modular model checking algorithm for cyclic feature compositions." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-01115-201156/.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: modular verification; feature-oriented software development; model checking; assume-guarantee reasoning. Includes bibliographical references (p. 72-73).
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Mohamad, Mamdouh. "Strain Accumulation Due to Cyclic Loadings." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-68039.

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The formation of plastic strains in non-cohesive soils due to large number of loading cycles is a phenomenon of great importance in geotechnical and civil engineering. It constitutes a considerable cause for failures and deformations in various types of engineering applications including pavements. Strain accumulation due to cyclic loading has been studied for years through different models. This thesis reviews various models and focuses on the Bochum model through which, the most contributing soil and traffic parameters on permanent strains formation in pavement subgrades can be figured out.
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Wichtmann, Thorsten. "Explicit accumulation model for non-cohesive soils under cyclic loading /." Bochum : Inst. für Grundbau und Bodenmechanik, 2005. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014636041&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Moosbrugger, John C. "A rate-dependent bounding surface model for nonproportional cyclic viscoplasticity." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/16353.

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Brubaker, Joel Patrick. "A Diffusion Model for Cyclic Voltammetry with Nanostructured Electrode Surfaces." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1418273596.

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8

Butler, James Henry. "Cyclic Salinity Model for deposition of large-scale coal deposits." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/84926/1/James%20Butler%20Thesis.pdf.

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Existing field data for Rangal coals (Late Permian) of the Bowen Basin, Queensland, Australia, are inconsistent with the depositional model generally accepted in the current geological literature to explain coal deposition. Given the apparent unsuitability of the current depositional model to the Bowen Basin coal data, a new depositional model, here named the Cyclic Salinity Model, is proposed and tested in this study.
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9

Mun, Byoung-Jae. "Unsaturated soil behavior under monotonic and cyclic stress states." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1361.

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The objectives of this dissertation are to measure and calculate surface free energies of soil particles, to understand the mechanical behavior of unsaturated silty sand through first studying the stress-strain relationship, the effects of matric suction and pore water chemistry and second to interpret the behavior by the critical state frame work, to develop a method to predict cone tip resistance in unsaturated soils, and to present the concept of pseudo strain and dissipated pseudo strain energy. Universal Sorption Device (USD) is developed to measure surface free energies of soil particle
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10

Kang, Sang June. "International norm development: cyclic model of norm change and self-determination." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/101/101131/tde-06022019-113106/.

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With the surge of constructivism, which values non-material factors and ideational variables, norm research became the center of interest in International Relations scholarship. The early constructivist theory is suitable for showing how a norm could be replaced by another but incapable of explaining how a norm itself changes. Hence, the next challenge for constructivism would be demonstrating a norm change mechanism. The purpose of this research is to fill a gap in the international norm literature. From a constructivist perspective, this research suggests a cyclic model of international norm
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11

Taskaya-Temizel, Tugba. "Configuration of neural networks to model seasonal and cyclic time series." Thesis, University of Surrey, 2006. http://epubs.surrey.ac.uk/844482/.

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Time series often exhibit periodical patterns that can be analysed by conventional statistical techniques. These techniques rely upon an appropriate choice of model parameters that are often difficult to determine. Whilst neural networks also require an appropriate parameter configuration, they offer a way in which non-linear patterns may be modelled. However, evidence from a limited number of experiments has been used to argue that periodical patterns cannot be modelled using such networks. Researchers have argued that combining models for forecasting gives better estimates than single time s
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12

Dabeet, Antone E. "A practical model for load-unload-reload cycles on sand." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/4082.

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The behaviour of sands during loading has been studied in great detail. However, little work has been devoted to understanding the response of sands in unloading. Drained triaxial tests indicate that, contrary to the expected elastic behaviour, sand often exhibit contractive behaviour when unloaded. Undrained cyclic simple shear tests show that the increase in pore water pressure generated during the unloading cycle often exceeds that generated during loading. The tendency to contract upon unloading is important in engineering practice as an increase in pore water pressure during earthquake lo
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13

Seidalinov, Gaziz. "A simple anisotropic bounding surface plasticity model for cyclic response of clays." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43501.

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Natural clays are anisotropic in their in-situ state and have an undisturbed shear strength in excess of the remoulded strength. In addition, most of the structures founded on clay deposits must be designed to withstand cyclic loads such as seismic ground motions or ocean waves. When subjected to earthquake or wind induced cyclic loadings, clay exhibits complex response. A realistic modeling of clay response under irregular cyclic loading requires an appropriate description of the stress{strain relationship. This thesis extends the formulation of a Simple ANIsotropic CLAY plasticity (SANICLAY)
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14

Corti, Riccardo. "Hardening memory surface constitutive model for granular soils under cyclic loading conditions." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.702493.

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The soil response under cyclic loading conditions is of interest for a number of geotechnical structure such as road pavements, tank foundations and offshore structures. When a geotechnical structure is subjected to cyclic loading, permanent settlements and rotations are accumulated affecting the serviceability of the structure. In the last years, a number of modelling strategies have been proposed to quantify the strain accumulation of soils under cyclic loading; however, most of the models are valid only for limited loading and drainage conditions, and they generally employ complex constitut
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15

Mucolli, Gent. "Fuzzy modeling of suction anchor behavior based on cyclic model tests data." Digital WPI, 2016. https://digitalcommons.wpi.edu/etd-theses/1313.

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This paper proposes a novel model that can predict the displacement of suction caisson anchors under monotonic and cyclic loading. Failure is assumed to occur when the accumulative monotonic and cyclic displacement along the load attachment point is over 60% of the diameter of the anchor. The anchors will go through lateral failure when the accumulative monotonic and cyclic displacement along the loading direction at the load attachment point is over 30% of the diameter. Hence, it is important to predict this displacement and therefore determine the expected failure of the anchor. However, it
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16

Nambiar, Arun N. "MATHEMATICAL FORMULATION AND SCHEDULING HEURISTICS FOR CYCLIC PERMUTATION FLOW-SHOPS." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1183424961.

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17

Lefticaru, Raluca, R. M. Hierons, and M. Núñez. "Implementation relations and testing for cyclic systems with refusals and discrete time." Elsevier, 2020. http://hdl.handle.net/10454/17953.

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Yes<br>We present a formalism to represent cyclic models and study di erent semantic frameworks that support testing. These models combine sequences of observable actions and the passing of (discrete) time and can be used to specify a number of classes of reactive systems, an example being robotic systems. We use implementation relations in order to formally define a notion of correctness of a system under test (SUT) with respect to a specification. As usual, the aim is to devise an extension of the classical ioco implementation relation but available timed variants of ioco are not suitabl
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18

Nassiri, Esmail. "Modelling nonlinear behaviour of two-dimensional steel structures subjected to cyclic loading." Thesis, Queensland University of Technology, 1998.

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19

Yeung, Arthur Ching Ki. "Numerical monotonic and cyclic simulations of sands using an endochronic plane strain model." Thesis, University of Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243676.

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20

Bowers, Jeremy Thomas. "Nonlinear Cyclic Truss Model for Beam-Column Joints of Non-ductile RC Frames." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/50437.

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Reinforced concrete (RC) moment frames comprise a significant portion of the built environment in areas with seismic hazards. The beam-to-column joints of these frames are key components that have a significant impact on the structure's behavior. Modern detailing provides sufficient strength within these joints to transfer the forces between the beams and the columns during a seismic event, but existing structures built with poor detailing are still quite prevalent. Identifying the need and extent of retrofits to ensure public safety through nondestructive means is of primary importance. Exist
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21

Augurelle, Anne-Sophie. "Feedback and feedforward processes underlying grip-load force coupling during cyclic arm movements." Université catholique de Louvain, 2003. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-06292007-114349/.

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During transport of hand-held objects, the grip force is modulated in parallel with the load force changes. The control scheme underlying this grip-load force coupling involves subtle interplay between feedforward and feedback mechanisms. Based on internal models of the motor system and object properties, the load force can be predicted and the GF motor command can be specified in a feedforward manner. Moreover, during the course of arm movement, the CNS is informed by sensory feedback about mechanical events such as the lift-off of the object, slippage or excessive grip force. This informatio
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22

Kim, Yong-seong. "A Cyclic Viscoelastic-Viscoplastic Constitutive Model for Clay and Its Application to Liquefaction Analysis." 京都大学 (Kyoto University), 2001. http://hdl.handle.net/2433/150285.

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23

Brescia, Marcella. "Cyclic nucleotide signalling in cardiac myocytes from the mdx model of Duchenne muscular dystrophy." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:012cc7b2-1568-4cd6-9660-fc1927581c82.

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<b>Background and Aims:</b> Duchenne muscular dystrophy (DMD), the most frequent muscular dystrophy, is caused by mutations in the dystrophin gene resulting in the absence of dystrophin. Loss of cardiac dystrophin eventually leads to dilated cardiomyopathy and congestive heart failure in at least 20% of patients. Previous studies have shown that inhibition of enzymes that degrade cGMP improves cardiac contractility, energy metabolism and cardiac myocyte integrity in the DMD mouse model mdx. The aim of this project is to explore whether defective cGMP and cAMP signalling is a feature of mdx car
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24

Johansson, Nils. "Estimation of fatigue life by using a cyclic plasticity model and multiaxial notch correction." Thesis, Linköpings universitet, Mekanik och hållfasthetslära, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158095.

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Mechanical components often possess notches. These notches give rise to stress concentrations, which in turn increases the likelihood that the material will undergo yielding. The finite element method (FEM) can be used to calculate transient stress and strain to be used in fatigue analyses. However, since yielding occurs, an elastic-plastic finite element analysis (FEA) must be performed. If the loading sequence to be analysed with respect to fatigue is long, the elastic-plastic FEA is often not a viable option because of its high computational requirements. In this thesis, a method that estim
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Chatziathanasiou, Dimitrios. "Cyclic multiaxial behavior modeling of Shape Memory Alloys." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0015/document.

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De nouvelles approches phénoménologiques sur la modélisation du comportement des AMFs sont nécessaires pour tenir en compte leur réponse complexe sous chargement multiaxial. L’effet de l’anisotropie induit une dépendance de leur comportement inélastique de la direction du chargement pour des cas superélastiques. La réorientation martensitique affecte drastiquement la réponse du matériau sous chargement non-proportionnel. La charge répétitive modifie aussi certaines propriétés du matériau. L’objectif de cette étude est de proposer un nouveau modèle constitutif thermodynamique robuste pour les A
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26

Whittle, Andrew John. "A constitutive model for overconsolidated clays with application to the cyclic loading of friction piles." Thesis, Massachusetts Institute of Technology, 1987. http://hdl.handle.net/1721.1/14639.

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Serrao, Shannon Reuben. "Stochastic effects on extinction and pattern formation in the three-species cyclic May–Leonard model." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/101782.

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We study the fluctuation effects in the seminal cyclic predator-prey model in population dynamics due to Robert May and Warren Leonard both in the zero-dimensional and two-dimensional spatial version. We compute the mean time to extinction of a stable set of coexisting populations driven by large fluctuations. We see that the contribution of large fluctuations to extinction can be captured by a quasi-stationary approximation and the Wentzel–Kramers–Brillouin (WKB) eikonal ansatz. We see that near the Hopf bifurcation, extinctions are fast owing to the flat non-Gaussian distribution whereas awa
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Forsberg, Björn. "Classical over-the-barrier model for ionization of poly-cyclic aromatic hydrocarbons in keV-collisions with atomic ions." Thesis, Stockholms universitet, Fysikum, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-60168.

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We are developing a novel classical over-the barrier model for electron transfer from an in nitely thin conducting disc to a point charge projectile to model multiple electron capture in e.g. keV collisions of atomic ions with poly-cyclic aromatic hydrocarbons (PAHs). In its nal form, the present model will incorporate the polarization of the PAH molecules due to the active electron and the point charge projectile at a general angle of incidence. This will drastically improve the description of the potential barrier in comparisons with simpler versions of the model where the nite size and pola
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Berger, Nadja [Verfasser], Wolfram [Akademischer Betreuer] Sander, and Nils [Akademischer Betreuer] Metzler-Nolte. "Conformations and dynamics of small model cyclic tetrapeptides / Nadja Berger. Gutachter: Wolfram Sander ; Nils Metzler-Nolte." Bochum : Ruhr-Universität Bochum, 2016. http://d-nb.info/1095884794/34.

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Assane, Oumarou Tahirou. "Cyclic behaviour of sand-steel interfaces: Experimental investigation and numerical simulation with a bounding surface model." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/26842.

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The first objective of this research program was to investigate the cyclic behaviour of sand-structure interfaces. To achieve this objective a series of monotonic and cyclic tests were performed using a simple shear type interface apparatus. The influence of the initial sand density, the number of cycles, the initial normal stress, and the amplitude of displacement on the shear stress mobilized at the interface, the normal displacement, and the amount of slip taking place at the interface were determined. The second objective of this research program was to model the behaviour of interfaces wi
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31

KC, Rabi. "Study of Some Biologically Relevant Dynamical System Models: (In)stability Regions of Cyclic Solutions in Cell Cycle Population Structure Model Under Negative Feedback and Random Connectivities in Multitype Neuronal Network Models." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou16049254273607.

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Blavo, Selasi Ofoe. "Model Pt- and Pd-based Electrocatalysts for Low Temperature Fuel Cells Applications." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4639.

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In the search for alternative energy technologies, low temperature fuel cells continue to feature as technologies with the most promise for mass commercialization. Among the low temperature fuel cells, alkaline and proton exchange membrane fuel cells are the most popular. Alkaline fuel cells have typically been used for water generation as well as auxiliary power for space shuttles. Their bulkiness however makes them undesirable for other applications, especially in automobiles, where there is a great demand for alternative technologies to internal combustion engines. Proton exchange membrane
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33

Thielen, Jörg [Verfasser]. "Investigation of the lithium ion mobility in cyclic model compounds and their ion conducting properties / Jörg Thielen." Mainz : Universitätsbibliothek Mainz, 2011. http://d-nb.info/1024995372/34.

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34

Das, Saumyasuchi. "Three dimensional formulation for the stress-strain-dilatancy elasto-plastic constitutive model for sand under cyclic behaviour." Thesis, University of Canterbury. Civil and Natural Resources Engineering, 2014. http://hdl.handle.net/10092/9335.

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Recent experiences from the Darfield and Canterbury, New Zealand earthquakes have shown that the soft soil condition of saturated liquefiable sand has a profound effect on seismic response of buildings, bridges and other lifeline infrastructure. For detailed evaluation of seismic response three dimensional integrated analysis comprising structure, foundation and soil is required; such an integrated analysis is referred to as Soil Foundation Structure Interaction (SFSI) in literatures. SFSI is a three-dimensional problem because of three primary reasons: first, foundation systems are three-dime
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35

Filipowicz, Dean. "A Biomechanical Comparison of 3.5 Locking Compression Plate Fixation to 3.5 Limited Contact Dynamic Compression Plate Fixation in a Canine Cadaveric Distal Humeral Metaphyseal Gap Model." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/33558.

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Objective- To compare the biomechanical properties of 3.5 locking compression plate (LCP) fixation to 3.5 limited contact dynamic compression plate (LC-DCP) fixation in a canine cadaveric, distal humeral metaphyseal gap model in static axial compression and cyclic axial compression and torsion. Study Design- Biomechanical in vitro study. Sample Population- 30 paired humeri from adult, medium to large breed dogs. Methods- Testing was performed monotonically to failure in axial compression on ten pairs of humeri, cyclically in axial compression for 10,000 cycles on ten pairs and cyclically in to
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36

Paschkewitz, Timothy Michael. "Ammonia Production at Ambient Temperature and Pressure: An Electrochemical and Biological Approach." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/4893.

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The majority of power generated worldwide is from combustion of fossil fuels. The sustainability and environmental impacts of this non renewable process are severe. Alternative fuels and power generation systems are needed, however, to cope with increasing energy demands. Ammonia shows promise for use in power generation, however it is costly to produce and very few methods of using it as a fuel are developed. To address the need for alternative methods of ammonia synthesis, this research designed and tested a bioelectroch
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Staninska, Ana. "A theoretical model for self-assembly of flexible tiles." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002041.

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Müller, Dirk [Verfasser]. "Model-Assisted Analysis of Cyclic AMP Signal Transduction in Saccharomyces cerevisiae – cAMP as Dynamic Coordinator of Energy Metabolism and Cell Cycle Progression / Dirk Müller." Aachen : Shaker, 2006. http://d-nb.info/1170528538/34.

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Nakamura, Akiko. "Investigation of FAD Chemical Models to Study the Monoamine Oxidase Catalyzed Oxidation of Cyclic Tertiary-Allylamines." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/51589.

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Flavin adenine dinucleotide (FAD) is a coenzyme that participates in the redox process of flavoenzymes. Attempts to characterize the catalytic pathways of these enzymes have relied in part on the use of FAD chemical models. The efforts described in this dissertation focus on the chemical model approach to investigate the mechanism of the monoamine oxidase (MAO) catalyzed oxidation of the cyclic tertiary allylamine 1-methyl-4-(2-methyl-1H-pyrrol-2-yl)-1,2,3,6-tetrahydropyridine (TMMP), which is a close analog of the parkinsonian-inducing designer drug 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridin
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40

MIRANDA, LIDIA PACHECO. "ANALYSIS OF THE MECHANICAL BEHAVIOR OF GEOSYNTHETIC-REINFORCED PAVEMENT UNDER CYCLIC LOADING IN A TRUE SCALE PHYSICAL MODEL." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2013. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=22959@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>A busca por soluções geotécnicas que aumentem a vida útil das estruturas e também possam economizar material natural levou ao desenvolvimento de produtos conhecidos como geossintéticos. Dentre as várias famílias de geossintéticos, foram criados elementos que funcionassem como reforço de base-subleito em pavimentos na condição de subleito muito deformável, denominadas geogrelhas. O presente trabalho teve o objetivo de analisar o comportamento
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41

Ditto, Maggie J. "Investigating Mechanical Strain-Induced Phenotypic Changes on Prostate Cancer Cell Toward Metastasis Using a Three-Dimensional In-Vitro Model." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1365162394.

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42

Akin, Umut. "Seismic Assessment Of Reinforced Concrete Beam-to-column Connections Under Reversed Cyclic Loading." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613123/index.pdf.

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Prior experimental research clearly reveals that the performance of reinforced concrete frame structures under earthquake loading is closely related to the behavior of beam-to-column connection regions. In order for a reinforced concrete building to have an adequate response under high lateral deformations, beam-to-column connections should be able to preserve their integrity. However, even today beam-to-column connections are assumed to be rigid or elastic, leading to an incorrect estimation of the structural response under earthquake loading. One of the basic reasons for the assumption of ri
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43

Costa, Marcelo Saad Taulois da. "Desenvolvimento de modelo hipoplástico aplicável a carregamentos cíclicos." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3145/tde-01092017-132955/.

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Modelos constitutivos são relações matemáticas entre grandezas físicas que buscam descrever o comportamento dos materiais quando submetidos a ações externas. A hipoplasticidade é um modelo constitutivo desenvolvido para solos a partir de uma modificação da equação hipoelástica. Este modelo tem como principais características a existência de uma única equação constitutiva e o seu caráter não linear, o que lhe confere a propriedade de introduzir deformações irreversíveis desde o início das ações externas. Neste trabalho são estudados dois novos modelos desenvolvidos com o objetivo de melhorar as
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Gustafsson, David. "Constitutive modelling of the nickel base superalloy IN718, a preparatory study." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15755.

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<p>One of the limiting factors in gas turbine design is the allowable metal temperatures and loads in critical components. Specially designed superalloys are used when the conditions are most severe. One of these superalloys is Inconel 718. To be able to design components for higher temperature and higher loads, an accurate understanding and computational model of the material is needed. In this thesis the deformation mechanisms of Inconel 718 have been investigated and a theoretical basis for modelling in a large deformation context has been established. Finally a viscoplastic nonlinear kinem
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Bahtui, Ali. "Development of a constitutive model to simulate unbonded flexible riser pipe elements." Thesis, Brunel University, 2008. http://bura.brunel.ac.uk/handle/2438/3010.

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The principal objective of this investigation is to develop a constitutive model to simulate the hysteresis behaviour of unbonded flexible risers. A new constitutive model for flexible risers is proposed and a procedure for the identification of the related input parameters is developed using a multi-scale approach. The constitutive model is formulated in the framework of an Euler-Bernoulli beam model, with the addition of suitable pressure terms to the generalised stresses to account for the internal and external pressures, and therefore can be efficiently used for large-scale analyses. The d
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Penzl, T. "A cyclic low rank Smith method for large, sparse Lyapunov equations with applications in model reduction and optimal control." Universitätsbibliothek Chemnitz, 1998. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-199801035.

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We present a new method for the computation of low rank approximations to the solution of large, sparse, stable Lyapunov equations. It is based on a generalization of the classical Smith method and profits by the usual low rank property of the right hand side matrix. The requirements of the method are moderate with respect to both computational cost and memory. Hence, it provides a possibility to tackle large scale control problems. Besides the efficient solution of the matrix equation itself, a thorough integration of the method into several control algorithms can improve their performance to
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TESEI, CLAUDIA. "Nonlinear analysis of masonry and concrete structures under monotonic and cyclic loading: a regularized multidirectional d+/d− damage model." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2710141.

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A rigorous structural analysis is fundamental in the safety assessment of the built heritage and in its efficient conservation and rehabilitation. In line with the necessity of refined techniques, the objective of the present thesis is to develop and validate, in a displacement-based finite element framework, a nonlinear model apt for the study of masonry and concrete structures under monotonic and cyclic loading. The proposed constitutive law adopts two independent scalar damage variables, d+ and d−, in combination with the spectral decomposition of the elastic strain tensor, to simulate th
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Sutton, Corey R. "Characterization of Resistance Change in Stretchable Silver Ink Screen Printed on TPU-Laminated Fabrics Under Cyclic Tensile Loading." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2089.

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A stretchable silver ink was screen printed to TPU sheets, then tensile coupons of the TPU, both bare and laminated to cotton, Denim and spandex fabric, were subjected to 1000 cycles of 20% uniaxial strain. In-situ resistance measurements of printed traces were processed to generate datasets of maximum and minimum resistance per cycle. A mechanistic fit model was used to predict the resistance behavior of the ink across TPU/fabric levels. The results show that traces strained on TPU laminated to spandex (polyester) fibers had an average rate of increase in resistance significantly lower than t
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Groth, Kevin M. "Nonlinear Lumped-Parameter Model of the Lumbar Intervertebral Disc: A Study on Viscoelastic Deformation and Three-Dimensional Modeling of the Spine." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/34313.

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Due to the mathematical complexity of current musculoskeletal spine models, there is a need for computationally-efficient models of the intervertebral disc (IVD). The aim of this study is to develop a mathematical model that will adequately describe the motion of the IVD under axial cyclic loading and three-dimensional quasi-static loading as well as maintain computational efficiency for use in future musculoskeletal spine models. <p> A viscoelastic standard nonlinear solid (SNS) model is introduced within this study. It was developed to predict the axial response of the human lumbar IVD
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Calik, Ertugrul Emre. "Development Of A Physical Theory Model For The Simulation Of Hysteretic Behavior Of Steel Braces." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608328/index.pdf.

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Bracing members are considered to be effective earthquake-resistant elements as they improve the lateral strength and stiffness of the structural system and contribute to seismic energy dissipation by deforming inelastically during severe earthquake motions. However, the cyclic behavior of such bracing members is quite complex because it is influenced by both buckling and yielding. This thesis presents simple but an efficient analytical model that can be used to simulate the inelastic cyclic behavior of steel braces. This model achieves realism and efficiency by combining analytical formulati
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