Dissertations / Theses on the topic 'Damaged bone'
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Suzuki, Kiyoshi. "Cold Ischemic Damage to Bone." Thesis, Thieme Medical Publishers, 1991. http://hdl.handle.net/2237/16724.
Full textParsamian, Gagik P. "Damage mechanics of human cortical bone." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2014.
Full textTitle from document title page. Document formatted into pages; contains xiii, 165 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 146-165).
Shank, Stephanie Brooke. "Bone Damage Associated with Orthodontic Miniscrew Implants." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1299685868.
Full textArmstrong, J. A. "Characterisation of bone cement damage by acoustic emission." Thesis, Queen's University Belfast, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517071.
Full textStewart, Morgan. "Written in Bone: Damage Patterns in Agonopsis vulsa Armor." Scholarship @ Claremont, 2019. https://scholarship.claremont.edu/scripps_theses/1414.
Full textRamsey, Daniel S. "Effects of Gamma Irradiation on the Damage Processes in Human Trabecular Bone." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1279224864.
Full textSedman, Andrew James. "Mechanical failure of bone and antler : the accumulation of damage." Thesis, University of York, 1993. http://etheses.whiterose.ac.uk/14047/.
Full textHayes, Anna. "A study of the damage of articular cartilage caused by crystals." Thesis, University of Bath, 1992. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303393.
Full textJoo, Won. "CROSS-MODAL EFFECTS OF DAMAGE ON MECHANICAL BEHAVIOR OF HUMAN CORTICAL BONE." Case Western Reserve University School of Graduate Studies / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=case1126285139.
Full textArango, Villegas Camila. "Study of the mechanical behavior of cortical bone microstructure by the finite element method." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/67570.
Full text[ES] El tejido óseo cortical es el encargado de dar soporte y estructura a los vertebrados. Existe por tanto una necesidad de conocer y analizar mecánicamente su comportamiento desde los distintos niveles jerárquicos que lo componen, siendo mayor la complejidad y más escasos los estudios disponibles en la literatura cuanto más pequeña es la escala estructural que se analiza. Estos estudios son relevantes para comprender, prevenir y solucionar problemas de salud importantes que afectan al ser humano. Desde el punto de vista mecánico es interesante evaluar y aplicar herramientas numéricas ingenieriles para el análisis de materiales más complejos como son los biológicos, incrementando el estado del arte en distintas disciplinas que pueden ser aplicadas en numerosos campos como la ciencia de los materiales, la biomecánica, los métodos numéricos o la medicina, entre otras. En esta Tesis se analiza el comportamiento mecánico del hueso cortical a nivel microestructural, donde se modela mediante el método de los elementos finitos su unidad básica, la osteona. Para la obtención de las propiedades elásticas se considera en los modelos la microestructura compuesta por capas de colágeno mineralizado con diferentes orientaciones, dispuestas de manera concéntrica alrededor de los canales vasculares. Se incluye además la utilización de modelos micromecánicos de elementos finitos que tienen en cuenta la composición heterogénea tanto para el nivel del fibrilo de colágeno mineralizado (nivel nanoestructural) como para el nivel de lamela (nivel sub microestructural). El análisis del fallo para geometrías realistas se aplica tras comparar varios modelos que involucran por un lado el crecimiento de grietas mediante condiciones de contacto y por otro, degradación de las propiedades elásticas del material mediante subrutinas de usuario del código de elementos finitos, siendo este último el que mejores resultados presenta desde el punto de vista del coste computacional. De esta manera se presenta una alternativa interesante que permite evaluar la propagación del daño a nivel tridimensional, lo que con otros métodos como el X-FEM puede ser computacionalmente inabordable. Se aplican criterios de fallo utilizados para materiales compuestos en ingeniería estructural a las osteonas y los resultados se relacionan con los de los ensayos experimentales disponibles en la bibliografía, mostrando la relevancia de las tensiones de cortadura entre lamelas para la iniciación y propagación del daño. En un estudio bidimensional, también se muestra la participación importante en la fase de inicio de daño de las lagunas de osteocitos lo que es interesante desde un enfoque de mecanotransducción celular.
[CAT] El teixit ossi cortical és l'encarregat de donar suport i estructura als vertebrats. Existeix per tant una necessitat de conèixer i analitzar mecànicament el seu comportament des dels diferents nivells jeràrquics que ho componen, sent major la complexitat i més escassos els estudis disponibles en la literatura com més xicoteta és l'escala estructural que s'analitza. Aquests estudis són rellevants per a comprendre, prevenir i solucionar problemes de salut importants que afecten a l'ésser humà. Des del punt de vista mecànic és interessant avaluar i aplicar eines numèriques ingenieriles per a l'anàlisi de materials més complexos com són els biològics, incrementant l'estat de l'art en diferents disciplines que poden ser aplicades en nombrosos camps com la ciència dels materials, la biomecànica, els mètodes numèrics o la medicina, entre altres. En aquesta Tesi s'analitza el comportament mecànic de l'os cortical a nivell microestructural, on es modela mitjançant el mètode dels elements finits la seua unitat bàsica, la osteona. Per a l'obtenció de les propietats elàstiques es considera en els models la microestructura composta per capes de col·làgen mineralitzat amb diferents orientacions, disposades de manera concèntrica al voltant dels canals vasculars. S'inclou a més la utilització de models micromecànics d'elements finits que tenen en compte la composició heterogènia tant per al nivell del fibril de col·làgen mineralitzat (nivell nanoestructural) com per al nivell de lamela (nivell submicroestructural). L'anàlisi de la fallada per a geometries realistes s'aplica després de comparar diversos models que involucren d'una banda el creixement de clavills mitjançant condicions de contacte i per un altre, degradació de les propietats elàstiques del material mitjançant subrutines d'usuari del codi d'elements finits, sent aquest últim el que millors resultats presenta des del punt de vista del cost computacional. D'aquesta manera es presenta una alternativa interessant que permet avaluar la propagació del dany a nivell tridimensional, la qual cosa amb altres mètodes com el X-FEM pot ser computacionalment inabordable. S'apliquen criteris de fallada utilitzats per a materials compostos en enginyeria estructural a les osteones i els resultats es relacionen amb els de els assajos experimentals disponibles en la bibliografia, mostrant la rellevància de les tensions de cisallament entre lameles per a la iniciació i propagació del dany. En un estudi bidimensional, també es mostra la participació important en la fase d'inici de dany de les llacunes d'osteòcits el que és interessant des d'un enfocament de mecanotransducción cel·lular.
Arango Villegas, C. (2016). Study of the mechanical behavior of cortical bone microstructure by the finite element method [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/67570
TESIS
Uemura, Maiko. "Pericyte-derived bone morphogenetic protein 4 underlies white matter damage after chronic hypoperfusion." Kyoto University, 2017. http://hdl.handle.net/2433/227592.
Full textBrinkman, Jennifer G. "The Effect of Damage on the Long-Term Viability of Cortical Bone Allografts." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1280808150.
Full textJung, Lisa [Verfasser]. "Laying hen welfare -The prevention of feather pecking and keel bone damage / Lisa Jung." Kassel : Universitätsbibliothek Kassel, 2019. http://d-nb.info/1201507871/34.
Full textKUMMARI, SEETHA RAMUDU. "Experimental and Computational Evaluation of Microscopic Tissue Damage and Remodeling Cavities in Trabecular Bone." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1300920008.
Full textMakhrova, Ye G. "Devices for surgical treatment of fractures and damages of long bones." Thesis, БДМУ, 2020. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/18322.
Full textPOLI, VLADIMIR D. "Estudo da interação de pulsos de femtossegundos com o tecido ósseo." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11705.
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Dissertação (Mestrado Profissionalizante em Lasers em Odontologia)
IPEN/D-MPLO
Instituto de Pesquisas Energéticas e Nucleares - IPEN/CNEN-SP; Faculdade de Odontologia, Universidade de São Paulo, São Paulo
岩本, 正実, Masami IWAMOTO, 英一 田中, Eiichi TANAKA, 耕平 伝田, Kohei DENDA, 創太 山本, and Sota YAMAMOTO. "異方性と損傷を考慮した皮膚骨の非弾性構成式の定式化." 日本機械学会, 2005. http://hdl.handle.net/2237/9109.
Full textLopez, Baez Juan Carlos. "Characterising the novel activation of wt1b in the notochord damage response of zebrafish larvae." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/15890.
Full textDux, Stephanie J. "The Effect of Gamma Radiation Sterilization on Yield Properties and Microscopic Tissue Damage in Dense Cancellous Bone." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1254317910.
Full textHoch, Johanna M. "SERUM CARTILAGE OLIGOMERIC MATRIX PROTEIN: A BIOMARKER FOR ACUTE ARTICULAR CARTILAGE DAMAGE." UKnowledge, 2012. http://uknowledge.uky.edu/rehabsci_etds/3.
Full textFoust, Jennifer L. "THE USE OF TOOTH PIT AND TOOTH/JAW MEASUREMENTS TO IDENTIFY CARNIVORE TAXA RESPONSIBLE FOR DAMAGE ON SCAVENGED BONE." The University of Montana, 2010. http://etd.lib.umt.edu/theses/available/etd-05032010-182611/.
Full textHenderson, Keyanna Brielle. "Understanding the Effects of Long-Duration Spaceflight on Fracture Risk in the Human Femur Using Finite Element Analysis." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2255.
Full textGoenka, Shilpi. "Influence of higher frequency components and duration of mechanical vibration on artery and bone in a rat-tail model." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378195712.
Full textAn, Feng-Chen. "Modelling of FRP-concrete interfacial bond behaviour." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10511.
Full textEusemann, Beryl Katharina [Verfasser]. "The Influence of Egg Production, Genetic Background, Age, and Housing System on Keel Bone Damage in Laying Hens / Beryl Katharina Eusemann." Berlin : Freie Universität Berlin, 2020. http://d-nb.info/1222029391/34.
Full textYang, Li. "A damage-based time-domain wear-out model for wire bond interconnects in power electronic modules." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13646/.
Full textRyan, Steven Francis. "Fatigue Simulation of Human Cortical Bone using Non-Homogeneous Finite Element Models to Examine the Importance of Sizing Factors on Damage Laws." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/33067.
Full textNon-homogeneous finite element models were created from micro computed tomography (CT) images of dumbbell shaped fatigue samples. An automatic voxel meshing technique was used which converted the CT data directly into mesh geometry and material properties.
My results showed that including these sizing factors improved the accuracy of the fatigue simulations on the non-homogeneous models. Using the Nelder-Mead optimization routine, I optimized the sizing factors for a group of 5 models. When these optimized sizing factors were applied to other models they improved the accuracy of the simulations but not as much as for the original models, but they improved the results more than with no sizing factors at all. I found that in our fatigue simulations we could account for the effects of stressed volume and inhomogeneity by including sizing factors in the life and damaging laws.
Master of Science
Slade, Robert Arthur. "Failure Analysis of Impact-Damaged Metallic Poles Repaired With Fiber Reinforced Polymer Composites." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5505.
Full textID: 031001508; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Adviser: Kevin R. Mackie.; Title from PDF title page (viewed August 5, 2013).; Thesis (M.S.)--University of Central Florida, 2012.; Includes bibliographical references (p. 101-103).
M.S.
Masters
Civil, Environmental, and Construction Engineering
Engineering and Computer Science
Civil Engineering; Structural and Geotechical Engineering
Hamandi, Farah Mohammed Ridha Abdulateef. "Hierarchical Structure, Properties and Bone Mechanics at Macro, Micro, and Nano Levels." Wright State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=wright1607294294076853.
Full textГортинська, Олена Миколаївна, Елена Николаевна Гортинская, Olena Mykolaivna Hortynska, and Д. О. Кияненко. "Ріст, формоутворення та хімічний склад кісток скелету за умов дії на організм солей важких металів і радіації на фоні гіпоксії." Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/14150.
Full textTashakori, Shervin. "Novel Structural Health Monitoring and Damage Detection Approaches for Composite and Metallic Structures." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3753.
Full textBlomqvist, Göran. "De-icing salt and the roadside environment : Air-borne exposure, damage to Norway spruce and system monitoring." Doctoral thesis, KTH, Civil and Environmental Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3140.
Full textAfter decades of investigation, we still have to deal withthe problem of environmental effects of the use of de-icingsalt on roads. Lacking useful indicators of the system, westill do not know the environmental utility of ameliorativemeasures taken. The thesis aims at
i) describing the system of de-icing practices and theirenvironmental effects with special reference to the exposure ofthe roadside environment to air-borne salt and damage to Norwayspruce seedlings and ii) at proposing indicators for afollow-up system. By collecting bulk deposition and relatingthe deposition pattern to factors concerning wind androad-maintenance characteristics, the influence of thesefactors on air-borne exposure is investigated. By exposingNorway spruce (Picea abies(L.) Karst.) seedlings to roadsideconditions the influence ofsalt exposure on the degree ofdamage is investigated. Based on a comparison of severalsystems of monitoring, improvements are suggested by proposingnew indicators for salt use and its environmental effects.
A large part of the salt that is applied on the road surfacewill be transported by air and deposited on the ground in theroadside. While the vast majority of the salt will be depositedwithin some tens of metres of the road, some may still be windtransported several hundred metres away. The wind directionplays an important role for the deposition already at adistance of some ten metres from the road. Wind speedinfluences the distance to which the salt is transported.Chloride concentration in unwashed needles collected after thesalting season is positively related to the bulk deposition ofCl during the exposure. The degree of damage can be describedby a sigmoid curve of response to the Cl concentration inneedles. Improvements to the follow-up system are suggested byproposing indicators of the driving forces, pressures, states,impacts and possible responses as regards the undesired impactson water resources, vegetation and the roadside scenery as asocietal asset.
Keywords:road, de-icing salt, air-borne, environmentalimpact, vegetation damage, Norway spruce, seedling, follow-up,monitoring, indicator
Azzam, Aussama. "On the Mechanical Modeling and Analysis of the Dynamical Fiber Pullout Mechanism Taking into Account the Damage and Viscoelasticity of the Bond." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-197897.
Full textTextil bewehrter Beton (Textilbeton) ist ein neues Baumaterial mit zunehmender Verwendung in modernen Ingenieuranwendungen. Die experimentellen Untersuchen an Textilbeton zeigen Mehrfachrissbildung, die zu Betonriss- und Faserauszugsmechanismen korrespondieren. Das Ziel dieser Forschungsarbeit ist die mechanische Untersuchung des Faserauszugsmechanismus unter dynamischer Belastung. Hierzu werden geeignete Materialmodelle für das Matrix-Faser-Interface vorgeschlagen, die zwei mechanische Phänomene, nämlich das Schädigungsverhalten und den Dehnraten-Effekt, berücksichtigen. Diese Materialmodelle sind das elastische Schädigungsmodell, das viskoelastische Modell und zwei entwickelte viskoelastische Schädigungsmodelle. Zudem wird ein analytisches Modell zum Faserauszugsmechanismus bereitgestellt, wobei die beschreibende Bewegungsgleichung aufgestellt und geschlossene, analytische Lösungen unter dynamischer Erregung durch eine harmonische Auszugsverschiebung am Faserende gefunden werden. Diese analytischen Lösungen werden für zwei Materialmodelle, das elastische Schädigungsmodell und das viskoelastische Modell, hergeleitet. Außerdem wird die dynamische Antwort für den Fall einer linear ansteigenden Auszugsverschiebung mit konstanter Geschwindigkeit gesucht. Zu dieser dynamischen Belastung wurde für die numerische Lösung der entsprechenden nichtlinearen Differentialgleichung ein diskretesModell (DISCRETE MODEL) entwickelt und mit einem iterativen Lösungsverfahren gelöst. Darüber hinaus wurde ein Vergleich zwischen den Ergebnissen, die bei Verwendung der unterschiedlichen vorgeschlagenen Materialgesetze für das Interface erhalten wurden, durchgeführt. Das elastische Schädigungsmodell kann zum einen mit einem von der Schlupfrate abhängigen dynamischen Vergrößerungsfaktor (DIF) für die Verbundfestigkeit bzw. die Steifigkeit des Interface verwendet werden. Zum anderen werden die Dehnraten-Effekte durch die viskosen und viskoelastischen Anteile in den entwickelten viskoelastischen Schädigungsmodellen abgebildet. Der zweite Teil dieser Dissertation behandelt die mechanische Untersuchung des uniaxialen Zugverhaltens von Textilbeton unter dynamischer Zugbelastung. Ein zugehöriges analytisches Modell wird zuerst formuliert. Zudem werden der Mehrfachrissbildungszustand und der Faserrissüberbrückungsmechanismus an einem Textilbetonprobekörper mittels einer Finite-Elemente-Analyse an einem dreidimensionalen, heterogenen Modell untersucht
Baingo, Darek. "A Framework for Stochastic Finite Element Analysis of Reinforced Concrete Beams Affected by Reinforcement Corrosion." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23063.
Full textGoda, Ibrahim. "Micromechanical models of network materials presenting internal length scales : applications to trabecular bone under stable and evolutive conditions." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0055/document.
Full textA methodology based on micromechanics has been developed to determine the effective behavior of network materials endowed with a discrete architecture at the microscopic level. It relies on the discrete homogenization method, which has been applied to textile monolayers and trabecular bones. The initially discrete topology of the considered network materials results after homogenization at the mesoscopic level in anisotropic micropolar effective continuum, which proves able to capture the observed internal scale effects. Such micromechanical methods are useful to remedy the difficulty to measure the effective mechanical properties at the intermediate mesoscopic level scale. The bending and torsion responses of vertebral trabecular bone beam specimens are formulated in both static and dynamic situations, based on the Cosserat theory. 3D models have been developed for describing the multiaxial yield and brittle fracture behavior of trabecular bone, including the analysis of size-dependent non-classical plastic yield. We have constructed by FE analyses a homogeneous, orthotropic couple-stress continuum model as a substitute of the 3D periodic heterogeneous cellular solid model of vertebral trabecular bone, based on the equivalent strain energy approach. Bone tissues are able to adapt their local density and load bearing capacities as well as their size and shape to mechanical stimuli. We have developed models for combined internal and external bone remodeling in the framework of the thermodynamics of irreversible processes, at both the cellular and macroscopic levels. We lastly combined anisotropic internal remodeling with fatigue continuum damage
Petit, Mikael. "Impacts balistiques crâniens osseux, l'expérimentation au service de l'enquête." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAD030/document.
Full textWound ballistics is at the crossing between ballistics and legal medicine. It frequently has to tackle skull gunshot wounds evaluation and characterization. Many researches have been made around head and skull traumas, aiming at an improvement of security devices, but considering the field of ballistics, researches are either inexistent or marred by undemonstrated certainties. This work first aims at setting a firing protocol out, using animal skull bones that are similar with humans’. This original setup allies high speed video recordings and damage analysis with microtomography. It has shown up relationships between impact speed, exit speed, dissipated energy and observed damages. It comes in contradiction with many models formerly exposed, and hence fulfills our second objective. Important data acquired from experiments can show as very useful for wound ballistics expert to support one of his hypothesis about which firearms and ammunition type were used. This work eventually proposes a new model explaining the interaction between projectile and bone structure during damage creation
Rukavina, Tea. "Multi-scale damage model of fiber-reinforced concrete with parameter identification." Thesis, Compiègne, 2018. http://www.theses.fr/2018COMP2460/document.
Full textIn this thesis, several approaches for modeling fiber-reinforced composites are proposed. The material under consideration is fiber-reinforced concrete, which is composed of a few constituents: concrete, short steel fibers, and the interface between them. The behavior of concrete is described by a damage model with localized failure, fibers are taken to be linear elastic, and the behavior of the interface is modeled with a bond-slip pull-out law. A multi-scale approach for coupling all the constituents is proposed, where the macro-scale computation is carried out using the operator-split solution procedure. This partitioned approach divides the computation in two phases, global and local, where different failure mechanisms are treated separately, which is in accordance with the experimentally observed composite behavior. An inverse model for fiber-reinforced concrete is presented, where the stochastic caracterization of the fibers is known from their distribution inside the domain. Parameter identification is performed by minimizing the error between the computed and measured values. The proposed models are validated through numerical examples
Bhatnagar, Himanshu. "Computational Modeling of Failure in Thermal Barrier Coatings under Cyclic Thermal Loads." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1230741103.
Full textAzzam, Aussama [Verfasser], Bernd W. [Akademischer Betreuer] Zastrau, and Kai [Akademischer Betreuer] Willner. "On the Mechanical Modeling and Analysis of the Dynamical Fiber Pullout Mechanism Taking into Account the Damage and Viscoelasticity of the Bond / Aussama Azzam. Betreuer: Bernd W. Zastrau. Gutachter: Bernd W. Zastrau ; Kai Willner." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://d-nb.info/1095395319/34.
Full textPham, Hong Nga. "Flood risk assessment focusing on intangible vulnerability for rural floodplain area in Central Vietnam." Kyoto University, 2019. http://hdl.handle.net/2433/244499.
Full textFiloux, Arnaud. "Le comportement de subsistance des premiers européens du pourtour méditerranéen : étude des assemblages osseux de Barranco León, Fuente Nueva 3, la grotte du Vallonet et des niveaux inférieurs de la Caune de l'Arago." Thesis, Montpellier 3, 2011. http://www.theses.fr/2011MON30011/document.
Full textThe purpose of this work is determinated the mode of acquisition of the meat-based resources by the groups of hominids during the lower Palaeolithic in Europe. The presence of the genus Homo in Europe previous to the paleomagnetic Jaramillo event, is attested in several archeological sites. This dispersal outside Africa is indicated by litic industry belonging to the cultural horizon of Préoldowayen and by human fossils affiliated to genus Homo. This study is centred on taphonomical and zooarcheological analysis, of three faunal assemblages associated with a mode 1 industry (Barranco León, Fuente Nueva 3, the Vallonnet cave) and an assemblage associated with a mode 2 industry (Caune de l' Arago). Analyses allow to understand the processes formation of these assemblages in open air site and in cave, and to estimate the part of the agents who intervened. The implication of human is attested in the modification of the carcasses of big mammals. Bones present cutmarks which imply that flakes were used to discard flesh and a characteristic fracturation connected to the percussion of bones by stones tools. The analysis of the bones assemblages reveals a variability of the systems of supply in meat-based subject. The comparison of theses accumulations, bring a better understanding of the subsistences behavior and allows to propose an outline of the variability and the chronology of the eating habits of the Paleolitic People in Southern Europe during Lower and Middle Pleistocene
Chiriatti, Léon. "Etude de l'adhérence armature-béton, influence des granulats de béton recyclé et apport des mesures acoustiques." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAD040/document.
Full textThe use of recycled concrete aggregate (i.e. aggregate produced from concrete demolition rubble) has a significant impact on the mechanical behavior of reinforced concrete members. This work focuses on the influence of recycled concrete aggregate on rebar-concrete bond. First, an analytical madel of the rebar-concrete bond is developed. The original feature of this modellies in the limited number of non-free physically-based parameters on which it is based. These parameters are then experimentally determined through a pull out test campaign. Three types of concrete, including two recycled aggregate concretes, are studied. Pull-out test monitoring is completed by acoustic measurements in order to obtain data from inside the concrete bulk, where the reinforcing bar is located
Filho, Josafá de Oliveira. "Estudo teórico-experimental da influência das cargas cíclicas na rigidez de vigas de concreto armado." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-07112006-113514/.
Full textThe main purpose of this research is to analyze the experimental and theoretical behavior of reinforced concrete beams, in order to quantify the stiffness loss, by calculating successive deflections during the cyclic loads application, under service loads. The emphasis of this research is the numerical analysis. The modeling of steel-concrete interface is done taking into account the contact between the steel bars (with their ribs) and the concrete surrounding the bars. The numerical analysis was made by using the software ABAQUS, based on the finite element method. The concretes constitutive model is based on the continuous damage mechanics. The experimental tests were made with cylinder concrete specimens with an axial bar and rectangular and T cross section reinforced concrete beams, where some had only tension reinforcement and others had tension and compression reinforcement. Comparisons between experimental and numerical results are presented and discussed. At the end expressions to quantify the stiffness loss due to number of cycles are proposed.
Zadeh, Patricia Kelly. "Theoretical Considerations for Understanding the Nature of Relational Trauma and Loss of Interpersonal Self-Esteem of Women in Narcissistic Relationships." Antioch University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1503534979668914.
Full textKittner, Kai. "Integrativer Modellansatz bei der Co-Extrusion von Aluminium-Magnesium-Werkstoffverbunden." Doctoral thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-112923.
Full textA compound made of aluminum (sleeve material) and magnesium (core material) was analyzed. The compound was built up in a hydrostatic co-extrusion process. First investigations showed damage (cracks) in the interface between the aluminum and the magnesium. Regarding the damage an optimization of the process was necessary. The FEM simulation was used to analyze the process. The focus of the analysis was the stresses and strains in the forming zone. A first result was that high contact shear stresses occurred in the interface. These stresses damaged the interface. Further investigations showed big strain differences between both of the materials. These differences caused in the different flow behaviour (yield stresses) of both materials. A better understanding was reached by a design of experiment (doe). This analysis showed the interactions between the different parameters and the influence of the parameters itself. Parameters with a big influence on the compound quality are the yield stresses, the die design, the friction and the billet design. The first result was an improvement of the compound quality by changing the die design. Therefore, an impeccable compound quality could be reached. Furthermore the results of analysis lead to an embracing empirical compound extrusion model. This consists of three single models. The first model was the quality model. This model allows to predict the compound quality with respect to the big influencing parameters. The second model was a bond strength model. This model gives the possibility to compute the strength of the interface. And at last the third model was the diffusion model. The embracing compound extrusion model allows to make a statement about the compound quality and strength before any real trials are carried out
永正, 邵., and Yongzheng Shao. "Study on the effects of matrix properties on the mechanical properties of carbon fiber reinforced plastic composites." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12902982/?lang=0, 2015. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12902982/?lang=0.
Full text博士(工学)
Doctor of Philosophy in Engineering
同志社大学
Doshisha University
Barth, Nicolas. "Sur la modélisation et la simulation du comportement mécanique endommageable de verres borosilicatés sous sollicitation thermique." Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAD016/document.
Full textWe study the thermomechanical behavior of vitrified waste packages by multiphysics modeling. The packages are manufactured by the cast of borosilicate glass into stainless steel canisters. The finite element method is used for the thermal computations.In the glass, the finite element analysis is also used to compute the specific volume evolution and the viscoelastic behavior, due to the structural relaxation of glass, as well as the simulation of the damage behavior. These consecutive behavior laws model theinfluence of the initial thermal response. Glass structural relaxation is computed using the TNM-KAHRmodel, which allows us to take into account fundamental phenomena of the glass transition, depending on the results of experimental and simulated thermal treatments. For the solid glass within this relaxation process, the stress may locally increase beyond critical values. The viscoelastic structure simulation is then coupled with continuum damage mechanics where stresses and stiffness are updated in mode I and mode II. We apply this simulation protocol after adopting conditions relative to the case of these manufactured bulky solidifying glass casts. The models then allow us to quantify the cracking surfaces inside the glass fromthe energy dissipated within the damagemodel
Lesser, Juan Carlos Cisneros. "Avaliação do trauma intracoclear causado pela inserção do feixe de eletrodos do implante coclear via fossa média em ossos temporais." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/5/5143/tde-03052017-152606/.
Full textIntroduction: In recent years, a middle fossa approach has been described for the insertion of cochlear implants, and it proved to be a reliable alternative for implantation in patients with chronic supurative otitis media, unstable mastoid cavities with recurrent otorrhea, partially ossified cochlea and in some cases of inner ear dysplasia. Until now, no research has been done to describe if this approach allows for anatomic preservation and non-traumatic insertions comparable to those through the round window. Objective: To evaluate cochlear trauma when the cochlear implant electrode is inserted through a middle fossa approach by means of histologic and imaging studies in temporal bones. Methods: 20 temporal bones retrieved before 24 hours after death were implanted through a middle cranial fossa cochleostomy in the basal turn of the cochlea. Ten received a straight electrode and 10 a perimodiolar electrode. After reducing the bone size with preservation of the inner ear structures, the temporal bones were fixed, dehydrated and embedded in an epoxy resin. CT scans were performed to determine if an adequate direction of insertion was attained, the depth of insertion and the distance between the cochleostomy and the round window. At last, the samples were polished by micro-grinding technique and microscopically visualized to evaluate intracochlear trauma. Results: The CT-scan showed an adequate intracoclear position of the electrode in all the samples. In the straight electrode group the average number of inserted electrodes was 12.3 (10 to 14) against 15.1 (14- 16) for the perimodiolar (U=78, p=0.0001). The median depth of insertion was significantly larger for the perimodiolar electrode group (14.4mm vs. 12.5mm U=66, p = 0.021). Only one atraumatic insertion was achieved and 70% of the samples had important trauma (grades 3 and 4). No differences were identified for the trauma grades between the two groups of electrodes. Also, there were no differences in trauma if the cochlear implants were inserted in the direction of the basal turn of the cochlea or in the direction of the middle and apical turns. Conclusions: The surgical technique that was used allowed for a proper intracochlear insertion of the electrodes in all 20 temporal bones but it does not guarantee a correct scala tympani position and carries high trauma risk for the intracochlear microstructures
Gonzáles, Laca Carlos Miguel, and Faustor Carmen Jahaira Denise Villanueva. "Analysis of Article 159 of the Tax Code: An Appointment on the Denaturalization of the Counterclaim." Derecho & Sociedad, 2015. http://repositorio.pucp.edu.pe/index/handle/123456789/118818.
Full textEl presente artículo desarrolla los conceptos de medida cautelar y contracautela, a la luz de lo resuelto por el Tribunal Constitucional y lo establecido por nuestra doctrina, así como los alcances del primero como derecho fundamental y del segundo como requisito de ejecución. De la misma forma, se analiza los alcances de la incorporación del artículo 159° del Código Tributario, mediante Decreto Legislativo N° 1121, y su modificatoria a través de la Ley N° 30230. Finalmente, se propone una posible modificación al mencionado artículo, de conformidad con los fines recaudatorios del Estado y el derecho a la tutela jurisdiccional efectiva de los administrados.
Naue, Janine. "Histologische Charakterisierung eines murinen Knorpeldestruktionsmodells in der BALB/c Maus." Doctoral thesis, Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-184744.
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