Дисертації з теми "Mechanical connection"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Mechanical connection".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Kiani, Sepehr. "Multi-connection vias for printed circuit boards." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/8665.
Повний текст джерелаIncludes bibliographical references (p. 182-184).
As the performance of digital electronic components improves, maintaining the integrity of high-frequency signals through circuit boards becomes increasingly challenging. The dimensions and material parameters of in-plane circuit board features, such as striplines, microstrips and co-planar waveguides are tuned to control signal impedance. Conventional multi-layer vertical interconnects, which connect between board layers, are not impedance matched to the in-plane signal traces. Multi-connection vias, developed in this thesis, provide a method for matching the impedance of vertical and in-plane features by forming co-cylindrical waveguides. Solutions from a high-frequency full-wave solver provide insight into field interactions within multi-connection vias; and results from these simulations and signal integrity experiments indicate impedance "tuneability" by adjusting the multi-connection via dimensions. The results also suggest that features can be impedance-matched independent of via diameter. Multi-connection vias are formed by creating distinct conductor paths within cylindrical plated through-holes. The thesis explores several alternative manufacturing methods for fabricating these features. A specialized broaching machine and carbide-insert broaches were used to manufacture multi-connection vias for signal integrity experiments. Models of the broach tool and cutting force simulations resulted in several iterations of the broach design.
(cont.) Broaching multi-connection vias is challenging due to the small diameters and high aspect ratios of plated through-holes, as well as the unique copper-epoxy/resin material. Since the broaching process prefers larger plated through-holes to permit larger broach tools, a new method was developed to analyze the cumulative connection density of multi-connection via arrays. Multi-connection vias provide fertile ground for the development of corollary electronic products. Simulations for connector launches indicate that via impedance control can extend to board-mounted devices and connectors. Products that may benefit from multi-connection vias include by-pass capatrs, IC packages, test probes and pogo pins. The thesis presents a road map for commercializing multi-connection vias. Elements of the roadmap ... integration of new signal routability constraints in CAD/CAM software, manufacturing processes, machine tool design, board testing, and durability.
by Sepehr Kiani.
Ph.D.
Li, Xinming. "Piezoelectric-based structural health monitoring of flexible beam connection damage." Thesis, University of Ottawa (Canada), 2003. http://hdl.handle.net/10393/26511.
Повний текст джерелаLigon, Thomas (Thomas Crumrine). "Automated inter-model parameter connection synthesis for simulation model integration." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39887.
Повний текст джерелаIncludes bibliographical references (p. 73-75).
New simulation modeling environments have been developed such that multiple models can be integrated into a single model. This conglomeration of model data allows designers to better understand the physical phenomenon being modeled. Models are integrated together by creating connections between their interface parameters, referred to as parameter mapping, that are either shared by common models or flow from the output of one model to the input of a second model. However, the process of integrating simulation models together is time consuming, and this development time can outweigh the benefit of the increased understanding. This thesis presents two algorithms that are designed to automatically generate and suggest these parameter mappings. The first algorithm attempts to identify previously built integration model templates that have a similar function. Model interfaces and integration models are represented by attributed graphs. Interface graph nodes represent interface parameters and arcs relate the input and output parameters, and integration models graph nodes represent interface graphs and arc represent parametric connections between interface graph nodes.
(cont.) A similarity based pattern matching algorithm initially compares interface graphs in two integration model graphs. If the interface graphs are found to match, the algorithm attempts to apply the template integration model's parameter mappings to the new integration model. The second algorithm compares model interface parameters directly. The algorithm uses similarity measures developed for the pattern matching algorithm to compare model parameters. Parameter pairs that are found to be very similar are processed using a set of model integration rules and logic and those pairs that fit these criteria are mapped together. These algorithms were both implemented in JAVA and integrated into the modeling environment DOME (Distributed Object-based Modeling Environment). A small set of simulation models were used to build both new and template integration models in DOME. Tests were conducted by recording the time required to build these integration models manually and using the two proposed algorithms. Integration times were generally ten times faster but some inconsistencies and mapping errors did occur. In general the results are very promising, but a wider variety of models should be used to test these two algorithms.
by Thomas Ligon.
S.M.
de, Julien de Zelicourt Diane Alicia. "A Mechanical Fluid Assessment of Anatomical Models of the Total Cavopulmonary Connection (TCPC)." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4882.
Повний текст джерелаMagnusson, Emelie. "FE analysis and design of the mechanical connection in an osseointegrated prosthesis system." Thesis, Linköpings universitet, Mekanik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69402.
Повний текст джерелаBrown, Christian R. (Christian Randall). "Effect of hull-to-bulkhead flexible connection on blast resistance of double hulled ships." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/33434.
Повний текст джерелаIncludes bibliographical references (p. 65).
The use of double hull construction is commonplace within the shipping industry though it is largely unexploited within naval vessels. The Impact and Crashworthiness Lab at MIT has proposed the use of adaptive sandwich structures to improve the blast resistance of naval hulls. This project will address two main areas of investigation through the use of simplified analytical models: the integration of hardening and softening plastic core responses in the crushing of a rigidly supported sandwich panel; and the deformation analysis of a sandwich panel supported by non-rigid connections. The analytical solutions were utilized to perform a series of parametric studies to evaluate both the useable range of the models as well as to investigate the general behavior of a sandwich panel under a uniform load when supported by crushable connections. This initial investigation provides the simplified tools to begin and to validate a more detailed, numerical analysis.
by Christian R. Brown.
S.M.
Gikonyo, Joan, and Pierre Modig. "Parameterized and Adaptive Modelling of Mechanical Connections in Timber Frame Structures." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-77189.
Повний текст джерелаJuchnevičius, Žilvinas. "Deformation and strength of a cyclically bent threaded connection." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120206_165453-81433.
Повний текст джерелаSrieginės jungtys dažnai patiria ciklinių lenkimo apkrovų dėl temperatū-ros, vidaus slėgio ir jungiamųjų detalių deformacijų kitimo. Srieginėms jung-tims, kurios patiria ašinių ciklinių apkrovų jau yra sukurtos modernesnės daugiaciklio ir mažaciklio ilgaamžiškumo skaičiavimo metodikos, kuriomis detaliai kiekybiškai įvertinamas ašinės apkrovos pasiskirstymas tarp vijų. Ap-krovos pasiskirstymo sriegyje kiekybiniai duomenys leidžia detaliau ir tiksliau įvertinti konstrukcijos ypatumų (jungties ilgio, medžiagos, veržlės ir vijų for-mos) ir jungties elementų deformavimo stadijų įtaką. Tokios ilgaamžiškumo skaičiavimo metodikos cikliškai lenkiamoms srieginėms jungtims netaikomos, nes lenkiamoms srieginėms jungtims nėra sukurtų apkrovos pasiskirstymo vijose analitinių modelių, tinkamų praktiniam naudojimui. Šioje srityje taip pat nėra sukurtų ir modelių, kurie skaičiuojami baigtinių elementų metodu. Kadangi srieginė jungtis yra kompleksinis mazgas, kurį sudaro deformuo-jami elementai, tai apkrovos pasiskirstymą tarp vijų lemia jungties elementų deformacijų ir poslinkių suderinamumas. Matematiškai aprašant jungties de-formuotą būvį, reikalingi teoriniai ir eksperimentiniai duomenys, kurie atspin-dėtų jungties elementų deformavimo specifinius ypatumus, pasireiškiančius veikiant lenkimui. Disertacijoje siekiama sukurti cikliškai lenkiamų srieginių jungčių apkro-vos pasiskirstymo sriegyje skaičiavimo metodą ir pritaikyti jį mažacikliam ilga-amžiškumui skaičiuoti.
Spratley, Jon Peter Frederick. "mechanical design of an injectable microsensor for neural connection within the motor cortex of the human brain." Thesis, University of Birmingham, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.532287.
Повний текст джерелаPlatt, Robert Terry. "Development of A Ready-To-Assemble Construction System." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/29315.
Повний текст джерелаPh. D.
Pocius, Mindaugas. "Detalių sujungimo tyrimai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2006. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20060613_133703-79555.
Повний текст джерелаGhodrati, Ashkan, and Ahmed Rashid. "Modelling and Simulation of a Power Take-off in Connection with Multiple Wave Energy Converters." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3396.
Повний текст джерела+46736290781
Erdem, Melek Esra. "Failure Analysis Of Thick Composites." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615605/index.pdf.
Повний текст джерелаKarlsson, Louise, and Alexander Sjöberg. "Framtagning av snabbkoppling i polymera material för vätskekylda datacentraler." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-15320.
Повний текст джерелаThe objective of the Bachelor thesis is to create a concept proposal in collaboration with CEJN. This report is presenting activities involved in the development process used to obtain the final result. Referring to the expansive market for liquid cooled data centres, CEJN aims to be in the leading edge with a new quick connection coupling. This demands reduction of production costs relative their existing aluminium coupling, partly by change of material to plastics. Outsourcing is relevant as the company does not produce plastic components at set. The idea generation phase has been based on a pre-study consisting of literature studies, analyses of competing products through demolition, and user tests. Prototypes have been used for testing and evaluation throughout the process. The outer components of the quick connection coupling proved to be among the costliest details. Locking mechanism, the formation of an inner slot for seals and the junction between nipple- or coupling body and back part to allow assembly and to ensure a non-drip application, have been developed separately. Decisions for final concept selection were made with the company of commission, with data regarding costs, usage interpreted from prototypes and verdicts from external experts within plastics production. Sub solutions mentioned, were combined into a final concept which reduces costs and fulfils demands regarding performance, appearance and usability. The material from the project is propositioned to form the basis for further development and testing to ensure high product quality representing CEJN.
Shariatmadar, Hashem. "Seismic response of connections in precast concrete double-tees." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ30386.pdf.
Повний текст джерелаRama, Glauber Macedo. "Próteses parciais fixas apoiadas sobre conexão dente-implante rígida: análise do comportamento biomecânico antes e após ciclagem mecânica." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-12122014-103741/.
Повний текст джерелаThe association between tooth and implant in fixed partial dentures (FPD′s) have been questioned for many years due to its clinical implications, including selecting the best kind of connection design (rigid or semi-rigid connection). This study assessed cemented toothimplant supported rigid connected FPD′s on 3 types of implant connections (external hexagon - EH, internal hexagon - IH and morse taper - MT) and its relationship to the vertical misfit and FPD failure before and after mechanical cycling plus the photoelastic analysis of those situations. 21 specimens (7 EH, 7 IH and 7 MT) were fabricated on a master model that simulated tooth loss of elements 46 and 47, with an implant placed on the 47 area and a prepared tooth with simulated periodontal ligament in polyether on the 45 area. On this model, three-element metalloceramic rigid FPD′s were made, cemented to tooth and implant (universal post). The specimens were prepared and subjected to mechanical cycling with a 120N load under 1,000,000 cycles, simulating a 2-year clinical use of the prosthesis. Analyses of vertical misfit were performed by optical microscopy (40x) in all periods of FPD′s fabrication (before welding, after welding, after application of ceramic and after cycling). The FPD failure percentage after cycling was also evaluated (cracks/fractures/loss of cementation), and photoelastic test was performed (dental load only, simultaneous abutment load and occlusal load). The results for vertical misfit indicated a significant increase in the levels of misfit for all stages of fabrication for both tooth and implant (p<0.0001) but not significant between groups (p>0.059). For the FPD failure percentage, we found a decreasing rate in the order MT>IH>EH. The photoelastic test indicated a major amount of tension increase in the order MT<IH<EH. Based on these results, within the limitations of the study it was concluded that: the levels of vertical misfit tend to increase in the prosthesis fabrication steps for all implant connections; mechanical fatigue tends to interfere on vertical misfit in long term due to deformation of the framework depending on its thickness; the FPD failure percentage tends to be proportional to the rigidity increase of the implant connection; despite the decrease of rigidity of the implant connection favors the longevity of the FPD, this also tends to increase tensions on the abutments and stress on the surrounding bone; the use of subcrestal morse taper connection on rigid tooth-implant FPD′s tends to be preferable for the preservation of the abutments due to the lower abutment stress concentration at the expense of longevity of FPD, though this can be replaced if the failure is irreversible.
Dike, Nnadozie N. F. "Performance of Mechanical and Non-mechanical Connections to GFRP Components." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5187.
Повний текст джерелаID: 031001297; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Title from PDF title page (viewed March 7, 2013).; Thesis (M.S.)--University of Central Florida, 2012.; Includes bibliographical references (p. 80-82).
M.S.
Masters
Civil, Environmental, and Construction Engineering
Engineering and Computer Science
Civil Engineering; Structural and Geotechnical Engineering
Schleifenbaum, Stefan, Michael Schmidt, Robert Möbius, Thomas Wolfskämpf, Christian Schröder, Ronny Grunert, Niels Hammer, and Torsten Prietzel. "Load and failure behavior of human muscle samples in the context of proximal femur replacement." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-204698.
Повний текст джерелаShokrieh, Mahmood M. (Mahmood Mehrdad). "Failure of laminated composite pinned connections." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60608.
Повний текст джерелаBased on the model a computer code is developed. The computer code is capable of assessing damage, evaluating residual strength, and predicting ultimate strength of pin-loaded composite plates. Predicted results are compared with available experimental data. Excellent agreement between the predicted and the experimental data was found.
The computer code is used to study geometric parameters that influence joint strength. Such studies are useful in designing mechanical fastened joints using advanced composites.
Turetta, Maxime. "Development of an innovative U-shaped steel-concrete composite beam solution : experimental and numerical studies on the mechanical behaviour." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0203.
Повний текст джерелаAn innovative solution of steel-concrete composite beam was developed taking into consideration the fire situation and the construction stage. The beam is composed of a U-shaped steel part connected to a reinforced concrete part. In the construction phase, the beam is supporting the slab and constitutes a formwork for the reinforced concrete part. The U-shaped beam withstands the construction loads without any temporary propping system. When casting concrete, the steel beam is filled at the same time as the slab, this allows considerable time-saving on site. In exploitation stage, the beam behaves as a steel-concrete composite beam. The connection between the two materials is made by welded headed studs on the lower part of the U-shaped beam. In fire situations, the composite beam satisfies conventional fire stability durations due to the longitudinal reinforcements inside the concrete downstand part with sufficient covers. A literature review focuses on modern solutions that fulfils the criteria of the thesis is performed in order to develop an innovative solution optimised. In construction stage, the U-shaped steel beam without restraints is prone to lateral torsional buckling instability. In order to characterise the stability of the beam, a full-scale test is carried out at the Laboratory of the University of Luxembourg. The test clearly showed the lateral torsional buckling of the steel beam. The test results are compared to numerical simulations and analytical studies. A parametrical study, covering 200 geometrical configurations of the U-shaped beam, is carried out to validate the use of the curve "b" for the design of the steel beam for lateral torsional buckling according to Eurocodes 3. In the exploitation phase, once the concrete hardens, the beam has a steel-concrete composite behaviour provided by the shear connection between the two materials. For manufacturing reasons, the connection is located in a zone where the concrete is subjected to tension forces induced by the bending of the beam. The concrete in this zone is potentially cracked, thus the efficiency of the connection and therefore the mechanical steel-concrete composite behaviour is investigated. Another test is therefore carried out in the Laboratory of the University of Luxembourg, this time the specimen tested is made of concrete and steel. The failure mode is a shear mechanism of the composite beam at very large displacements. However, the beam specimen exhibited a real steel-concrete composite behaviour with high ductility, the connection is therefore very efficient. The test results are compared to numerical simulations in order to validate the finite element model developed. From numerical results and test results, an analytical method, based on EN 1994-1-1, is proposed to find the bending resistant of this composite beam by taking into account the partial yield of the side plates of the U-shaped steel section. A global analytical design method is proposed for the developed solution based on the Eurocodes with additional considerations and constructional guidelines
Vallance, Robert Ryan. "Precision connector assembly automation." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/38433.
Повний текст джерелаIncludes bibliographical references (p. 209-214).
Telecommunication systems, network servers, mainframes, and high-performance computers contain several printed circuit boards (PCBs) that are mounted in card-cage assemblies. Level-3 connectors, often called board-to-board connectors, transmit signals between the primary backplane PCB and the daughter card PCBs. These connectors are customized for each PCB by configuring modules along the length of the connector. Hence, the connector's assembly system must flexibly accommodate the connector configurations. Prior to this research, the assembly of daughter card connectors was a manual process. This thesis presents the conceptual design of an assembly cell, and thoroughly presents the selected concept, a flexible assembly system. In the flexible assembly system, the connector is fixtured on a pallet and transferred to assembly stations on a conveyor. The pallet must be precisely located at each station, to minimize the relative errors between the new component and the connector on the pallet. Kinematic couplings deterministically locate one rigid body with respect to another. Therefore, a pallet system was developed that uses split-groove kinematic couplings between the pallets and machines. Experiments demonstrated that the split-groove kinematic pallet was approximately O1X more repeatable than conventional pallet location methods. The design is evident in the fabrication and operation of the first automated machines for the connector assembly system. In automated machinery, kinematically coupled bodies are often subjected to ranges of disturbance forces. This thesis presents new methods for analyzing the static equilibrium, errors due to contact deformation, and contact stresses that result from disturbance forces. In addition, the manufacturing errors within individual pallets and machines combine to cause system-wide, variability in pallet location. Two methods are presented for estimating the system-wide variability in the position and orientation of the pallets.
by Robert Ryan Vallance.
Ph.D.
Ensley, Ann Elizabeth. "A fluid mechanic assessment of the total cavopulmonary connection." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/15724.
Повний текст джерелаHagg, Lobland Haley E. "Definition of Brittleness: Connections Between Mechanical and Tribological Properties of Polymers." Thesis, University of North Texas, 2008. https://digital.library.unt.edu/ark:/67531/metadc9097/.
Повний текст джерелаFang, Demi L. "Timber joinery in modern construction: Mechanical behavior of wood-wood connections." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127868.
Повний текст джерелаCataloged from the official PDF of thesis.
Includes bibliographical references (pages [107]-112).
Timber joinery is a method of geometrically interlocking timber elements prevalent in historic cultures around the world, including North America, Europe, and East Asia. The use of joinery as structural connections faded with the development of metallic screws and nails. Two recent developments offer the opportunity to revive this historic timber connection type: 1) the increasing desire to reduce embodied carbon in buildings by replacing more components with timber as a low-carbon structural material, and 2) recent digital fabrication capabilities which enable the precise milling of complex geometries as an alternative to the time- and labor-intensive handiwork required previously. How can joinery connections be designed in modern structural joints? Can we quantify the sustainability advantage of using these all-timber joints in lieu of the modern convention of metallic fasteners? This thesis addresses both questions as applied to the Japanese Nuki joinery type, though the workflows may be applied to any joinery geometry. First, the rotational stiffness of the Nuki joint is characterized and cross-verified using multiple methods. Second, the embodied carbon of a gravity frame using Nuki joints is compared to that of a gravity frame using conventional metallic fasteners. The use of Nuki joints not only eliminates the use of steel and aluminum but also provides rotational stiffnesses that enable smaller beam sections to be used. It is shown that gravity frames designed with Nuki joints could reduce embodied carbon by over 70% compared to gravity frames designed using conventional beam hanger connections. The findings make a case for all-timber joinery connections to be implemented as a sustainable alternative to conventional metallic connections used in modern timber construction.
by Demi L. Fang.
S.M. in Building Technology
S.M.inBuildingTechnology Massachusetts Institute of Technology, Department of Architecture
Hagg, Lobland Haley E. Brostow Witold. "Definition of brittleness connections between mechanical and tribological properties of polymers /." [Denton, Tex.] : University of North Texas, 2008. http://digital.library.unt.edu/permalink/meta-dc-9097.
Повний текст джерелаBrennan, Feargal Peter. "Fatigue and fracture mechanics analysis of threaded connections." Thesis, University College London (University of London), 1992. http://discovery.ucl.ac.uk/1317863/.
Повний текст джерелаTopp, David Anthony. "Fatigue/fracture mechanics analysis of threaded tether connections." Thesis, University College London (University of London), 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428985.
Повний текст джерелаKharouf, Nourhene. "Post-elastic behavior of bolted connections in wood." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36970.
Повний текст джерелаThe ADINA software package is used to generate the model. The problem presents two types of non-linearity. The first is due to geometric effects caused by increased sliding contact between the bolts and the oversized holes in the wood member. Contact is simulated using the Lagrange Multiplier algorithm available in ADINA. This algorithm enforces the compatibility of surface displacements at the wood member which is the contactor surface, and Coulomb frictional conditions over the contact segments, with a coefficient of friction of 0.7. The second non-linearity results from the material post-elastic behavior adjacent to the contact points. A plasticity-based compressive constitutive material model is developed to represent wood as elasto-plastic orthotropic according to the Hill yield criterion in regions of bi-axial compression. Linear elastic orthotropic response is applied otherwise. The model is incorporated as a user-supplied material model of ADINA to carry out the analysis.
The performance of the program and the effectiveness of the elasto-plastic material model are first verified with examples from the literature. Thereafter, numerical simulations of the post-elastic deformations of one- and two-bolt connections are compared to experimental results from tensile tests undertaken on glued-laminated timber connections with stocky bolts and subject to monotonic loading. Characterization tests are undertaken to obtain stiffness and strength for compression and tension parallel and perpendicular to grain, and shear, required as input in the new material model. Five configurations of single-bolt connections and four configurations of double-bolt connections have been tested with different combinations of end distance, edge distance, and spacing between bolts. Reasonable agreement is found between numerical and experimental load vs. strains obtained using single axis strain gages and strain rosettes mounted in regions of stress concentrations. The model is capable of tracing the post-elastic global deformation as obtained from experimental load vs. displacements of LVDT's mounted on specimens. The non-linearity of these load-slip curves is primarily caused by the inelastic wood deformation beneath the bolts at low load levels. This behavior explains the redistribution of load proportions among the bolts in a double-bolt connection. Under test configurations forces are unequally shared between the bolts even at the ultimate load. As a consequence, joint capacity as estimated with the proposed elasto-plastic material model is bounded by the so-called European Yield Model, which assumes equal load distribution among the bolts at ultimate, and the linear elastic model. Observed shear-out brittle failures of wood bolted connections are believed to be caused by excessive combined shear and tension perpendicular to grain along the sides of the contact zone.
Mahjoub, Musaab. "FE modeling of glulam beams with mechanical slotted-in steel plate connections." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-105430.
Повний текст джерелаPritchard, Robyn. "Investigations into the mechanics of connective tissue." Thesis, University of Cambridge, 2015. https://www.repository.cam.ac.uk/handle/1810/247921.
Повний текст джерелаRohrbach, Thomas Juhl. "Investigation of Design, Manufacture, Analysis, and Test of a Composite Connecting Rod Under Compression." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/1996.
Повний текст джерелаHeitritter, Kenneth I. J. "Mechanics of the diffeomorphism field." Thesis, University of Iowa, 2019. https://ir.uiowa.edu/etd/6761.
Повний текст джерелаMacdonald, Kenneth Alasdair. "Fatigue of drillstring threaded connections." Thesis, University of Aberdeen, 1996. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU090407.
Повний текст джерелаZamani, Zavieh Shahram. "Punching shear strength of edge column connections of rectangular flat plates." Thesis, University of Ottawa (Canada), 2003. http://hdl.handle.net/10393/26550.
Повний текст джерелаLeBlanc, David N. "Beam shear connections to HSS composite columns." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63273.
Повний текст джерелаDouglas, Neil. "Self-rotating life-forms, mechanical connections and simulation of deformable bodies in inviscid flow." Thesis, University of Surrey, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531369.
Повний текст джерелаTinl, Nicholas E. "An Investigation of the Bearing Strength of Bolted Connections in Aluminum and Titanium Alloys." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1322506214.
Повний текст джерелаBergstedt, Joel. "Connecting casting simulations with strength analysis." Thesis, KTH, Hållfasthetslära (Avd.), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223951.
Повний текст джерелаFinita element metoden och gjutsimuleringar har utvecklats och blivit väldigt populära i och med den utveckling som har skett på dator sidan. Kraftfullare datorer har lett till att simuleringar idag mer och mer speglar verkligheten. Detta har lett till att kopplingar mellan olika simuleringsverktyg har börjat utvecklats, så kallade multifysik verktyg. I detta arbete har kopplingen mellan gjutsimuleringar och hållfasthetssimuleringar utvärderats i avseende att förbättra Scanias beräkningsprocess.Arbetet visar att genom att implementera data från gjutsimuleringar i en hållfasthetsanalys så kan beräknaren förvänta sig en förändring i resultat. Förändringen är lokal och till stor del lokaliserad i områden med höga påfrestningar. Detta visar på betydelsen av att i framtiden använda sig av gjutsimuleringsdata i hållfasthetssynpunkt. Vidare så finns det stora utvecklingsmöjligheter inom ämnet och viss kalibrering bör genomföras innan användning.Under arbetets gång har en metod utvecklats som beskriver hur kopplingen mellan gjutsimuleringar och hållfasthet bör genomföras. Metoden kräver ett tvärfunktionellt samarbete mellan olika grupper på Scania men resultatet är givande för alla inblandade. Detta då förståelse för hur komponenten beter sig är av betydelse för både gjutsimuleraren liksom hållfasthets-beräknaren.
Chernozatonskii, L. A., and V. A. Demin. "Nanotube Connections in Bilayer Graphene with Elongated Holes." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35460.
Повний текст джерелаAbiose, Kabir. "Improving the concentrated solar power plant through connecting the modular parabolic solar trough." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/105718.
Повний текст джерелаCataloged from PDF version of thesis.
Concentrating solar power (CSP) stands as a promising renewable energy technology with the ability to contribute towards global reduction of carbon emissions. A major obstacle to increased adoption of CSP plants has to do with their high initial investment cost; consequently, there is a powerful desire to find improvements that decrease the initial capital investment for a CSP plant. One such improvement involves connecting modularized parabolic trough segments, each with the same dimensions, decreasing the overall amount of actuators required along with greatly simplifying system control architecture. This thesis is concerned with the extent to which parabolic solar trough modules can be connected together while still being able to operate to desired accuracy under expected load. Accuracy requirements are calculated, along with expected loads resulting in frictional torque on the trough. These expected loads are combined with a model for the effect of connecting multiple trough modules to generate a relationship between number of chained modules and required torsional stiffness. To verify said model, an experimental setup was designed and constructed to simulate loads due to both trough weight and wind loads.
by Kabir Abiose.
S.B.
Yahya, Najeeb Ali. "Failure analysis of bonded steel/CFRP laminate connections." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6659/.
Повний текст джерелаRoberts, Wayne S. "An alternative shear connection for steel concrete composite bridges." Thesis, Queensland University of Technology, 1999.
Знайти повний текст джерелаGustafsson, Johan, and Jakob Myhrberg. "Expansion Joints in timber bridges : Mechanical behavior under external loading." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-105321.
Повний текст джерелаSalihu, B. M. "Stress analysis of drillstring threaded connections." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/7752.
Повний текст джерелаNandy, Ananya. "Fabrication process and electromechanical characterization of a sliding connector system for modular stretchable electronics." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/123275.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 48-49).
The development of stretchable electronics has opened the potential for novel types of wearable electronic devices that can conform to curvilinear surfaces. In the traditional wearable space, modularity has been explored as a way to make devices customizable and multi-functional. Extending modularity and customizability to stretchable electronics could allow improved data collection in contexts where traditional sensor deployment is more challenging, such as on the human body. However, the use of soft materials for creating the stretchable electronic circuits necessitates a solution to modular connections for which traditional rigid electrical connectors are not adequately suited. To address the electrical connection problem, a process was developed for fabricating a new custom connector that was intended to be integrated more easily into the stretchable electronic circuit. The sliding custom connector was evaluated against integrating off-the-shelf electrical connectors into the stretchable substrate. It was found that the custom connector had several desirable traits in comparison to the existing connectors, including a low profile, good form factor at the band interface, and easier integration into a stretchable substrate. In addition, the connector was able to achieve an average of 12.1% strain before failure, higher than the maximum 8.7% strain achieved by the snap-button, a tested off-the-shelf connector. However, the custom connector resistance was much higher, on the order of 10 [Omega] in comparison to between 0.2 and 2 [Omega] in the tested off-the-shelf connector systems. It will be necessary to pursue further iterations to reach the electrical properties afforded by the tested off-the-shelf connectors and to increase the strain before failure.
by Ananya Nandy.
S.B.
S.B. Massachusetts Institute of Technology, Department of Mechanical Engineering
Au, Eu Ving. "The Mechanics and Design of a Non-tearing Floor Connection using Slotted Reinforced Concrete Beams." Thesis, University of Canterbury. Civil and Natural Resources Engineering, 2010. http://hdl.handle.net/10092/4949.
Повний текст джерелаMiller, Crispin Mount. "So can you build one? : learning through designing--connecting theory with hardware in engineering education." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11548.
Повний текст джерелаWhitenack, Russell D. "Design and analysis of solder connections using accelerated approximate procedure with disturbed state concept." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/280662.
Повний текст джерелаKim, Jueseok. "Linear Finite Element Modeling of Joined Structures with Riveted Connections." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563273473791073.
Повний текст джерелаChandrappa, Kori Vinay Kumar, and Ganesan Gowtham Prasath Radhakrishnan. "Design optimization and testing of electrical connector for low voltage transmission cabinets : In collaboration with ABB AB Kabeldon." Thesis, Högskolan i Halmstad, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-40761.
Повний текст джерела