Relevant bibliographies by topics / The screw connection

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'The screw connection'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "The screw connection"

1

Sapiee, Siti Fairuz, and Hieng Ho Lau. "Influence of Screw Spacing on the Strength of Self-Drilling Screw Connection for the High Strength Cold-Formed Steel." Advanced Materials Research 712-715 (June 2013): 1054–57. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1054.

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Self-drilling screws are the primary means of fastening for cold-formed steel members in cold-formed thin-gauge steel residential construction because it can drill their own holes and form their own threads. The fabrication of connections is the most labour intensive aspect of the cold-formed thin-gauge steel construction process, thus a better understanding of the behaviour of screw connections could lead to optimum connection design and reducing the cost of the fabrication. The study carried out to investigate the behaviour of single-shear connections using self-drilling screws in the cold-formed steel construction. The focus of this study is on the influence of the number of screws and screw spacing on the strength of self-drilling screw connection. These parameters are varied to determine their influences on the connection strength. The failure load and failure modes were obtained and observed from the tests carried out in the laboratory. Bearing and tilting failures occurred during the testing of these specimens. The predicted connection strengths were calculated using American Iron and Steel Institute (AISI) design equations. A total of 24 specimens of single shear test showed that connection strength is linearly proportional to the number of screw in the connection. Results of the specimen with spacing more than 3d show better correlation with the calculated results as compared to specimens with screw spacing less than 3d.
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Shi, Gang, Jian Xing Zhang, Yuan Qing Wang, Hui Juan Huang, and Zheng Hong Zhang. "Cooperation Pullout Test of Double Self-Tapping Screws in Wood Structures." Advanced Materials Research 374-377 (October 2011): 2520–24. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.2520.

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In this paper, the experimental study on the self-tapping screw’s pullout resistance in the wood structure was conducted. Domestic ordinary screws were used together with imported or domestic wood to fabricate 6 screw connection specimens in wooden walls. Then monotonic loading tests were conducted and it can be concluded that, the common round screw connection strength mainly depends on the failure mode, the lack of cooperation effect significantly influences the strength of screw connections, and the dispersion of screw connection stiffness is high. So, to obtain formulae for the self-tapping screw connection strength and stiffness by further experimental study will be very necessary.
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Tokuhashi, Yasuaki, Masashi Oshima, Yasumitsu Ajiro, and Hiroshi Uei. "A Novel Pedicle Screw with Mobile Connection: A Pilot Study." BioMed Research International 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/841958.

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To prevent adjacent disc problems after spinal fusion, a pedicle screw with a mobile junction between the head and threaded shaft was newly developed. The threaded shaft of the screw has 10 degrees mobility in all directions, but its structure is to prevent abnormal translation and tilting. This screw was evaluated as follows: (1) endurance test: 106times rotational stress was applied; (2) biological reactions: novel screws with a mobile head and conventional screws with a fixed head were inserted into the bilateral pedicles of the L3, L4, and L5 in two mini pigs with combination. Eight months after surgery, vertebral units with the screw rod constructs were collected. After CT scan, the soft and bony tissues around the screws were examined grossly and histologically. As a result, none of the screws broke during the endurance test stressing. The mean amount of abrasion wear was 0.0338 g. In the resected mini pig section, though zygapophyseal joints between fixed-head screws showed bony union, the amount of callus in the zygapophyseal joints connected with mobile-head screws was small, and joint space was confirmed by CT. No metalloses were noted around any of the screws. Novel screws were suggested to be highly durable and histologically safe.
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Pournasrollah, Alireza, Ramin Negahdari, Vahedeh Gharekhani, Ali Torab, and Soheil Jannati Ataei. "Investigating the effect of abutment–implant connection type on abutment screw loosening in a dental implant system using finite element method." Journal of Dental Research, Dental Clinics, Dental Prospects 13, no. 4 (December 23, 2019): 289–97. http://dx.doi.org/10.15171/joddd.2019.044.

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Background. The most common problem associated with dental implants is the abutment screw loosening. This research aimed to investigate the effect of the type of connection on screw loosening, using a finite element method (FEM). Methods. Periosave system and different types of the implant–abutment connection were used for modeling. After being measured, CAD files were modeled using CATIA software and imported to the ANSYS analysis software, and the model was loaded. Results. A force of 100 N was applied at 0.1 second, and no force was applied at 0.42 second. The screw head deformation at 0.1 and 0.42 seconds was 8 and 3.8 μm, and 7.6 and 2.8 μm at morse taper and octagon dental implant connections, respectively. The displacement rate of the internal surface of the abutment at 0.1 and 0.42 seconds was 10.7 and 8.4 μm, and 5.7 and 5.6 µm in the octagon and morse taper dental implant connections, respectively. The displacement of the implant suprastructure–abutment interface from the screw head at 0.1 and 0.42 seconds was 9 and 7 μm, and 7 and 6 μm in the morse taper and octagon dental implant connections, respectively. At intervals of 0 to 0.1 seconds and 0.6 to 0.8 seconds, the octagon connection was separated at the maximum screw head displacement and the internal part of the abutment, but the morse taper connection did not exhibit any separation. In the above time intervals, the results were similar to the maximum state in case of the minimum displacement of the screw head and the internal part of the abutment. Conclusion. Screw loosening is less likely to occur in the morse hex connection compared to the octagon connection due to the lack of separation of the screw from the internal surface of the abutment.
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Ng, Adeline Ling Ying, and Zhi Yong Law. "Experimental Study of Cold-Formed Steel Moment Connections with Screw Fasteners." Materials Science Forum 950 (April 2019): 85–89. http://dx.doi.org/10.4028/www.scientific.net/msf.950.85.

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A series of connection with screw fasteners were tested to study the behavior of cold-formed steel moment connection. The test specimens included hot-rolled parallel flange channels, cold-formed lipped C-Channels, and self-drilling self-fastening screws. Two different lipped C-Channels and a various number of screws per connection were used in this study. The moment-rotation behavior, rotational rigidity, and the connection capacity differed with the number of screws. The connection behaved as a pinned connection when 4 screws were used. However, local buckling was observed in the cold-formed steel sections near the connection when 8, 10 and 14 screws were used. The connection test results were compared with theoretical results calculated in accordance to the Australian Standards. None of the connection tested could achieve the moment capacity of the section connected.
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Marx, Alexander, Thomas Hutsch, Patrick Schiebel, Dirk Feltin, Frank Hoffmeister, Andreas Babbel, Thomas Weißgärber, and Axel Herrmann. "Sintered Connection - A Steel/CFRP Connection Module." Key Engineering Materials 809 (June 2019): 203–9. http://dx.doi.org/10.4028/www.scientific.net/kem.809.203.

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Nowadays, carbon fiber reinforced plastics (CFRP) are present in a variety of applications. However, it is still possible to maximize the potential of CFRP by creating multi-material designs of CFRP and metal. The key to success for multi-material designs is the joining technology. In this work a metal/carbon fiber connection module was develop. Carbon fibers (CF) were integrated with stainless steel by using a powder metallurgy approach. After this, the created connection module was integrated in a fiber layup, which was infiltrated with epoxy resin by a Resin Transfer Molding (RTM) process. Leveraging from this technology, a M6 thread-forming screw was chosen and added in the sintered body. The screw press out test indicated that the strength between the screw and the sintered body was above 11 kN, which can be still enhanced for future by thread optimization. Microscopic cut images and computer tomography (CT) were used to characterize the CF in the sintered steel body and to examine the border area between the two materials.
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Kaczmarek, Jakub, Tomasz Bartkowiak, Piotr Paczos, Bartosz Gapinski, Hanna Jader, and Martin Unger. "How Do the Locking Screws Lock? A Micro-CT Study of 3.5-mm Locking Screw Mechanism." Veterinary and Comparative Orthopaedics and Traumatology 33, no. 05 (June 26, 2020): 316–26. http://dx.doi.org/10.1055/s-0040-1709728.

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Abstract Objective To quantify the amount of the screw head thread and the plate hole thread connection in two 3.5 mm locking plates: Locking Compression Plate (LCP) and Polyaxial Locking System (PLS). Materials and Methods A micro - CT scan of a screw head - plate hole connection was performed pre- and post destructive tests. Tests were performed on bone surrogates in a fracture gap model. The 3.5 LCP and 3.5 PLS plates, with 3 perpendicular screws per segment were used in a destructive static test. The 3.5 PLS plates with mono- and polyaxial screws were compared in a cyclic fatigue tests in two orthogonal directions. Pre - and post - test scan datasets were compared. Each dataset was converted into serial images depicting sections cut orthogonally to locking screw axis. The amount of engagement was detected through automated image postprocessing. Results The mean amount of the thread connection for the LCP was 28.85% before and 18.55% after destructive static test. The mean amount of the connection for the PLS was 16.20% before and 14.55% after destructive static test. When inserted monoaxially, the mean amount of the connection for the PLS screws was 14.4% before and 19.24% after destructive cyclic test. The mean amount of the connection for the polyaxial inserted PLS screws when loaded against plate thickness was 2.99% before and 2.08% after destructive cyclic test. The mean amount of the connection for the polyaxial inserted PLS screws when loaded against plate width was 3.36% before and 3.93% after destructive cyclic test. The 3D visualization of the thread connection showed that the initial interface points between screw head and plate hole are different for both LCP and PLS after the destructive testing. Depending on the type of applied force, there was either loss or increase of the contact. Clinical Relevance Micro-CT offers news possibilities in locking implant investigation. It might be helpful in better understanding the nature of locking mechanism and prediction of possible mode of failure in different systems.
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Oh, Ji-Hyeon, Young-Seong Kim, Joong Yeon Lim, and Byung-Ho Choi. "Stress Distribution on the Prosthetic Screws in the All-on-4 Concept: A Three-Dimensional Finite Element Analysis." Journal of Oral Implantology 46, no. 1 (February 1, 2020): 3–12. http://dx.doi.org/10.1563/aaid-joi-d-19-00090.

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The all-on-4 concept, which is used to rehabilitate edentulous patients, can present with mechanical complications such as screw loosening and fracture. The purpose of this study was to evaluate the stress patterns induced in the prosthetic screws by the different prosthetic screw and abutment designs in the all-on-4 concept using finite element analysis. Von Mises stress values on 6 groups of each screw type, including short and narrow screw, short abutment; short and wide screw, short abutment; long and wide screw, short abutment; short and narrow screw, long abutment; short and wide screw, long abutment; and long and wide screw, long abutment, were compared under a cantilever loading of 200 N that was applied on the farther posterior to the position of the connection between the distal implant and the metal framework. Posterior prosthetic screws showed higher stress values than anterior prosthetic screws. The stress values in posterior prosthetic screws decreased as the length and diameter increased. In conclusion, the long and wide screw design offers advantages in stress distribution when compared with the short and narrow design.
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Wusqo, Urwatul, Ali Awaludin, Angga Fajar Setiawan, and Inggar Septhia Irawati. "Study of Laminated Veneer Lumber (LVL) Sengon to Concrete Joint Using Two-Dimensional Numerical Simulation." Journal of the Civil Engineering Forum 5, no. 3 (September 18, 2019): 275. http://dx.doi.org/10.22146/jcef.47694.

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The connection system is a critical part of Timber – Concrete Composite (TCC) floor structures. The behaviour of the connection needs to be known to predict the behaviour of composite structure accurately. Screws are one kind of connector that mostly used in the composite structure due to its installation ease and high withdrawal strength. This study carried out a two-dimensional numerical simulation to examine the behaviour of LVL Sengon-concrete joint using OpenSees software. The lag screw used to connect LVL Sengon and concrete. In this simulation, the screw was assumed as a beam with hinges element that supported by a set of springs representing the strength of LVL Sengon and concrete. Some input parameters for this simulation were obtained from the material test and previous research. The effect of secondary axial force was considered into the load-displacement curve resulted from the numerical simulation. This study performed several simulations towards the variation of the screw diameter, penetration depth, and concrete compressive strength. The capacity of the connections resulted from the numerical simulation were overestimates the manual calculation using EYM theory and NDS 2018 equations. The capacity of the connection increased about 146% to 284% due to the addition of secondary axial forces. In addition, this simulation can adequately predict the shear force, bending moment, and deformation of the screw. There is a plastic hinge formed in the screw after the screw being deformed a quite large. It shows the same yield mode with the manual calculation using EYM theory and NDS 2018 equations. This simulation also can show the contribution of each spring elements to resist the load until its ultimate strength.
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Guo, Xiong, Lv Long Zou, Bing Lu, Shi Liang Zhang, Xing Ren Su, and Hui Xu. "Research on the Connection Performance of Variable Pitch of Screw Threaded Casing Based on 3D Finite Element Simulation Model." Applied Mechanics and Materials 215-216 (November 2012): 1105–10. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.1105.

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The connection performance of the large taper, multi-thread, variable pitch of screw threaded casing is researched by 3D finite element simulation on ANSYS Workbench. The 3D finite element model is created precisely. The stress distribution on the teeth of three kind variable pitch of screw threaded structure is studied by using the static structure of the contact analysis module. Contrasting stress distribution of the variable pitch of screw with of the equal pitch of screw under the same working condition, it is validated that design principle for the variable pitch of screw connection is correct. The influence of changes in the amount of variable pitch of screw to the whole stress distribution on teeth is discussed. The results show that the force distribution on the teeth of the variable pitch of screw connection is more uniform than equal pitch of screw, and will improve the overall carrying capacity. This study has its practical value to improve the connective performance of the threaded casing and enhance the product quality of threaded casing.
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Dissertations / Theses on the topic "The screw connection"

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Corner, Sebastien Marc William. "Screw-Fastened Cold-Formed Steel-to-Steel Shear Connection Behavior and Models." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/78073.

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This research introduces a proposed model for predicting tilting angle and limit states of single-fastened cold-formed steel-to-steel shear connections. Predictions are validated through an experimental study considering ply configuration and a single Hex #10 -washer head fastener, centered in a 102 mm by 102 mm three boundary window. The fastener tilting angle is captured using an automated, optical non-contact measurement procedure. The results are used to identify cold-formed steel shear connection deformation as load progresses, including tilting, bearing, and combined tilting bearing at the plies and thread tension, shear and bearing fastener failure. Results shows that fastener tilting plays a kinematic affect for the connection. Fastener tilting is predicted in function of ply thickness and fastener pitch. Local ply bending deformation is reported to be the main deformation of the connection during fastener tilting. While fastener bending and shear failure occurred if the fastener does not tilt.
Master of Science
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Francka, Ryan Michael. "Screw connections subject to tension pull-out and shear forces." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Francka_09007dcc8070fae3.pdf.

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Thesis (M.S.)--Missouri University of Science and Technology, 2009.
Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed November 23, 2009) Includes bibliographical references (p. 52).
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Rydman, Joakim. "Validation of blast simulation models via drop-tower tests." Thesis, Umeå universitet, Institutionen för fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-149403.

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This study aims to validate a screw joint simulation model used by BAE Systems in LS-DYNA during blast simulations. It is important that the screw joint simulation model is physically correct, since the simulation results can influence major design decisions. The study provides a short overview on the subject of bolts and screws, material deformation and stress and strain in materials, of the finite element method (FEM) and on some specific numerical methods used in this study. BAE Systems started a validation project of the screw joint simulation model in 2015, but it was not finished due to other priorities. In this older project some drop-tower tests measuring the axial force in a screw joint were conducted. These old tests can now serve as validation data for the screw joint simulation model. The screw joint simulation model used by BAE Systems is dependent on a special kind of finite element formulation; a so called beam element. This study provides a finite element analysis on this simulation model, which is implemented through an established industry FEM solver called LS-DYNA. The validation of the screw joint simulation model is done against three drop-tower experiments performed at 900, 1000 and 1100mm drop height respectively. The drop-tower experiments were replicated in LS-DYNA, with a prescribed velocity on the falling parts rather than simulating a free fall and non-elastic impact. A comparison between the simulation model using beam elements, that is used by BAE Systems, and a similar simulation model using solid elements is presented as part of the validation. To make sure that the result of the study is confident, a local mesh convergence study and a study of the mass scaling numerical method in LS-DYNA is also presented. The results show that the screw joint simulation model using beam elements is valid according to the available experimental data. In one of the experiments, where the drop-test was performed twice, an average maximum force on the screw was measured to be 33.5+-4.8 kN. Simulations of the same case, under the same conditions, using beam elements resulted in a maximum force on the screw of 35.4 kN, well within the experimental result range. In the other two drop-tower experiments, the simulated results showed correlation considering the error sources in the simulation model and the statistical spread that is present in the experimental results. The simulation model using beam elements is also similar to the results using solid elements, which also indicates that the beam model is valid. All in all, it is shown that the beam model can be used to produce safe results that either overestimate or place the simulations of the axial force in the screw in the upper spread of the measurements.
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Reynolds, Thomas Peter Shillito. "Dynamic behaviour of dowel-type connections under in-service vibration." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608327.

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This study investigated the vibration serviceability of timber structures with dowel-type connections. It addressed the use of such connections in cutting-edge timber structures such as multi-storey buildings and long-span bridges, in which the light weight and flexibility of the structure make it possible that vibration induced by dynamic forces such as wind or footfall may cause discomfort to occupants or users of the structure, or otherwise impair its intended use. The nature of the oscillating force imposed on connections by this form of vibration was defined based on literature review and the use of established mathematical models. This allowed the appropriate cyclic load to be applied in experimental work on the most basic component of a dowel-type connection: a steel dowel embedding into a block of timber. A model for the stiffness of the timber in embedment under this cyclic load was developed based on an elastic stress function, which could then be used as the basis of a model for a complete connector. Nonlinear and time-dependent behaviour was also observed in embedment, and a simple rheological model incorporating elastic, viscoelastic and plastic elements was fitted to the measured response to cyclic load. Observations of the embedment response of the timber were then used to explain features of the behaviour of complete single- and multiple-dowel connections under cyclic load representative of in-service vibration. Complete portal frames and cantilever beams were tested under cyclic load, and a design method was derived for predicting the stiffness of such structures, using analytical equations based on the model for embedment behaviour. In each cyclic load test the energy dissipation in the specimen, which contributes to the damping in a complete structure, was measured. The analytical model was used to predict frictional energy dissipation in embedment, which was shown to make a significant contribution to damping in single-dowel connections. Based on the experimental results and analysis, several defining aspects of the dynamic response of the complete structures, such as a reduction of natural frequency with increased amplitude of applied load, were related to the observed and modelled embedment behaviour of the connections.
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Pálka, Marek. "Analýza spojů proudovodiče při měření proudu ve VN aplikacích." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242142.

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The main focus of the dissertation thesis is determine the size of the fastening screw connection and fastening torque of the connection, which will be applied during assembly of the instrument current transformers and sensors. The large part of thesis is an experimental measurement of the proposed configurations of connections and modelling (simulating) certain model of connections in Ansys and SolidWorks analysis programs. The result of the dissertation will be design of tightening of the connection according to transient resistance and thermal losses.
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Skarp, Jerry, and Jake Sarvit. "Analys av bärförmåga och lastöverförande förband i prefabricerade bostads-volymelement av KL-trä : Analysis of bearing capacity and load transferring connections in prefabricated residential volumetric elements of CLT." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-79249.

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I denna studie analyseras en byggnad producerad med volymmoduler med lastbärande stomme av KL-trä. Resultat från analysen av hur laster påverkar byggnaden jämförs med resultat från motsvarande analys av en stomme producerad med reglar och balkar. I studien redovisas de krafter byggnaden utsätts för och förband mellan vägg och bjälklag. Ett förslag på förband mellan vägg och bjälklag presenteras och en jämförelse av bärförmågan i en volymmodul med KL-trästomme kontra träregelstomme genomförs.
In this study, a building produced with volume modules with a load bearing CLT-system is analyzed. Results from the analysis of how loads affect the building are compared with results from the corresponding analysis of a conventionally produced volumetric element and how vertical loads as well as wind loads affect its design. In the study, the forces that the building is exposed to are examined and the connection between wall and floor joints is designed. The forces and torque a construction built up of volume modules is exposed to are also presented. In the study the connection between the floor joints and the supporting wall is designed according to Eurocode. A comparison is presented with respect to the load carrying capacity of a volume module with CLT and a conventional load bearing frame.
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Sláma, Jakub. "Spojovací koridor." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226052.

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The subject of this master’s thesis was desingn and assessments the connection of two buildings by footbridge corridor. The structure was designed as a lattice structure without verticals. Construction is stored on two pillars lattice design. Cladding footbridge was cosidered by glazing. Construction is freestanding and doesn’t load bordering adjacent buildings.
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Li, Xun. "Cold-Formed Steel Member Connections Using BAC Screw Fasteners." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1505166/.

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In this project, the main research objective is intend to seek criteria for evaluating the capacity of BAC screw fasteners with mixed configuration of waterproof seal washer, sealer tape and different pre-drill holes to determine shear and tension strength values for the screws used in cold-formed steel connections. The thesis presents the design methods and test program conducted to investigate the behavior and strength of the screw connections in shear and tension test. Test results were compared with AISI design provisions to determine if new design equations will be developed for those screws used in BAC cooling tower applications. LRFD resistance factors and ASD safety factors were investigated to the proposed design equations.
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Rautenbach, Elana. "Finite element modelling of thin sheet steel screw connections." Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/60017.

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This study focused on the non-linear finite element modelling procedure, utilising the explicit dynamic analysis technique, and how the various modelling parameters affect the accuracy. The computer modelling of screwed connections is a complex task, and the objective was to investigate the different modalities of finite element modelling to effectively analyse thin sheet steel screwed connections, through calibration against test data found within existing literature. Several aspects of the modelling procedure were examined, including contact definitions, the effective control of the applied load and how it affects the energy output of the finite element model. The final calibrated model was utilised in subsequent parametric studies, which investigated the effect of the steel sheet thickness, as well as the number of the screws used. Results concluded that the finite element model could effectively simulate the expected experimental behaviour of these connections.
Disseration (MEng)--University of Pretoria, 2016.
Civil Engineering
MEng
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Brennan, Feargal Peter. "Fatigue and fracture mechanics analysis of threaded connections." Thesis, University College London (University of London), 1992. http://discovery.ucl.ac.uk/1317863/.

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This thesis aims to develop a comprehensive usable engineering design approach to the fatigue analysis of threaded connections. Although primarily concerned with the fatigue-fracture mechanics behaviour of screw threads, a broad review of stress analysis investigations in such connections is reported. Connection types, their functions and standardisation authorities are presented with the purpose of familiarising the reader with the subject and the options available to the design of threaded fasteners. Fatigue crack initiation is discussed with reference to the specific setting of a critical thread root. A crack initiation model is adapted for employment in thread root design. A novel weight function approach is developed for use in the determination of stress intensity factors for threaded connections. A generic solution is proposed valid for the fatigue crack growth from any thread root under any symmetrical stress system. Its development and discussion is examined in detail, remaining close to its proposed application. Two engineering situations where the chief structural components are comprised of threaded members are taken as case studies. The background to each situation is elaborated in detail and full-scale fatigue tests were conducted on the critical components. In all, fourteen full-scale tests under constant and variable amplitude loading are reported. The results of these are analysed and used to validate the fatigue crack initiation and propagation models. Useful observations which are helpful to understanding the fracture mechanisms operating during the fatigue of threaded connections are reported. Material and environmental considerations are examined and a survey of relevant materials and their behaviour in environments associated with threaded fasteners is presented. The merits or otherwise of some common engineering practices are discussed with regard to fatigue. A method has been developed for predicting fatigue life in large threaded connections under random loading. Experimental results have been gathered on two types of components used on certain oil rigs, tether joints and drill strings. The agreement found between prediction and experiment is appreciably better than by previous methods of analysis and also points to aspects open to further improvement.
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Books on the topic "The screw connection"

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Fonseca, Fernando S. Nail, wood screw, and staple fastener connections (CUREE publication). Consortium of Universities for Research in Earthquake Engineering, 2002.

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2

Fatigue of large diameter threaded connections: Proceedings of an international seminar organised by the NDE Centre, University College, London : held at the City University, 21-22 September, 1988. Warley, West Midlands, [England]: Engineering Materials Advisory Services, 1989.

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Book chapters on the topic "The screw connection"

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De’nan, Fatimah, Kok Keong Choong, Jessica Si Jia Loo, and Nor Salwani Hashim. "Finite Element Analysis of the Screw Arrangement Effects on the Connection Behaviour for Cold Formed Steel Truss Systems." In Proceedings of AICCE'19, 229–47. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-32816-0_14.

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De’nan, Fatimah, Kok Keong Choong, Jessica Loo Si Jia, and Nor Salwani Hashim. "Finite Element Analysis of the Effect of Screw Number on the Connection Behaviour for Cold Form Steel Truss Systems." In Proceedings of AICCE'19, 481–97. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-32816-0_33.

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Stalnaker, Judith J., and Ernest C. Harris. "Connections—Nails, Screws, and Bolts." In Structural Design in Wood, 74–100. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-9996-4_5.

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Stalnaker, Judith J., and Ernest C. Harris. "Connections—Nails, Screws, and Bolts." In Structural Design in Wood, 72–99. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-4082-3_5.

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Unger, Peter. "Screw Connections and Material Selection for Elevated Temperatures." In Hot Runner Technology, 207–10. München: Carl Hanser Verlag GmbH & Co. KG, 2006. http://dx.doi.org/10.3139/9783446430631.009.

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Rautenbach, E., and B. van Rensburg. "Finite element modelling of thin sheet steel screw connections." In Insights and Innovations in Structural Engineering, Mechanics and Computation, 1253–58. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315641645-205.

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Kanaval, Jan, Eliška Cézová, and František Starý. "Screw Connections with Application of Modern Insurance Sealants and Adhesives Analysis." In Current Methods of Construction Design, 295–301. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-33146-7_34.

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Ştefănescu, Dan Mihai. "Static and Dynamic Stiffness in Connection with Ball Screws and Reinforced Concrete Components." In Handbook of Force Transducers, 99–106. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-35322-3_9.

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Zarnani, Pouyan, and Pierre Quenneville. "Wood Load-Carrying Capacity of Timber Connections: An Extended Application for Nails and Screws." In Materials and Joints in Timber Structures, 167–79. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7811-5_16.

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Moshiri, F., R. Shrestha, and K. Crews. "The Predictive Model for Stiffness of Inclined Screws as Shear Connection in Timber-Concrete Composite Floor." In Materials and Joints in Timber Structures, 443–53. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7811-5_40.

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Conference papers on the topic "The screw connection"

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Ma, Pengfei, Shijing Wu, Li Zhu, and Wenkai Xiao. "Failure Analysis of the Screw Connection Rod of A Hoisting Machine." In 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/ifeesm-17.2018.192.

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Dharia, Mehul A., Micah A. Forstein, Rick C. Compton, and Danny L. Levine. "Screw/Plate Stability in Universal Locking Plate: A Novel Internal Fixator." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176232.

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The recent trend in internal fixation of fractures puts a greater emphasis on biological fixation, which involves the use of locking plates and screws [1]. While conventional plates rely on frictional forces between the plate and the bone, locking plates utilize a threaded connection between screw and plate for fixation and stability [2]. Surgeons choose either type of fixation device in treatments for specific fractures and injuries.
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Kim, Wangdo, Antonio Veloso, John Tan, and Carlos Andrade. "A Reciprocal Connection at Knee Joint." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19081.

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Ligaments and other soft tissues, as well as articular contacts, all contribute to the stability of the knee joint. However, precisely how these structural components of the knee joint affect joint stability is not fully understood. The extent to which geometric changes to said structure, resulting from surgical reconstruction and or replacement procedures, may affect joint movement is unclear. This paper was designed to explain connections between the instantaneous motion of the knee and restraining forces in the components that are engaged with it and responsible for such motion (i.e. the anterior cruciate ligaments (ACL), posterior cruciate ligament (PCL), medial collateral ligament (MCL), as well as bony contacts in the medial and lateral compartments). This instantaneous motion is characterized by a rotation about the instantaneous screw axis (ISA), governed by restraining forces along the wrench axes. Said restraining forces may be systematically explored using the principle of reciprocity [Hunt, 1990], which has previously been used to successfully explain the twists that a body may execute whilst maintaining, and not breaking, contact with other bodies. In this way, the motion coordinates may be linked to the force ones, within a novel unified screw coordinate construct. Thus, two approaches which were previously treated as separate entities may now be explained together and in simpler terms to clinicians and other practitioners.
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Lipina, Jan, Jiri Marek, and Vaclav Krys. "Screw connection and its load capacity in components made by rapid prototyping technology." In 2014 IEEE 12th International Symposium on Applied Machine Intelligence and Informatics (SAMI). IEEE, 2014. http://dx.doi.org/10.1109/sami.2014.6822407.

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Mahkamov, Khamid, Irina Makhkamova, and Fadi Kahwash. "Novel Twin-Screw Stirling Cycle Machine for Cryogenic and Refrigeration Applications." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86853.

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This paper describes design and principles of operation of a novel rotary type Stirling cycle machines based on rotary positive displacement mechanisms such as twin-screw, gate rotor screw, scroll, and conical screw compressors and expanders. When these mechanisms are used as separate expanding or compressing machines, the flow of the gas is one-directional with volumes of chambers varying in accordance with a saw-tooth type function. The proposed design solution combines at least two units of gas-coupled compressor and expander arrangements with a required shift in the shaft angle. Every unit has a series of gas channels for timing the connection of its compressor and expander parts. Units are connected to each other via a set of heat exchangers, which are conventional for Stirling cycle machines: recuperative cooling and warm heat exchangers with a regenerator, built between them. The operational capability is demonstrated using three-dimensional CFD simulations. Computational results demonstrate reciprocating flow of the gas between units, as in conventional Stirling machines, and functioning of the proposed design as a multi-cylinder, double acting Stirling machine. The suggested design makes it possible to achieve full dynamic balancing, especially in the case of twin-screw and gate rotor mechanisms, due to the rotation of screws around their axes. It also eliminates a number of problems, which are specific to Stirling machines with reciprocating pistons and their kinematic drive mechanisms.
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Zimmermann, Philipp, Kenny Pagel, André Bucht, and Welf-Guntram Drossel. "Design of a Self-Adjusting Terminal Connector Based on Shape Memory Alloys." In ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/smasis2014-7429.

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In electrical engineering terminal connectors are commonly used for connecting and releasing electrical conductors. Within the clamp or contact area the conductor is clamped safely and steadily by a mechanical mechanism to ensure a connection with a consistent quality and safety during the whole period of application. Terminal connectors are used to transfer power in the low and mid voltage range and for transmitting information. The contact force can decrease and the conductor can become loose. This happens due to an inappropriate installation of the conductor in the terminal connector, vibrations, temperature changes as well as the creepage of the contact material, mostly of the conductor. This may lead to damages or fires. Conventional connectors with a self-adjusting capability are not available for all conductor diameters respectively currents and are comparatively cost-intensive. In this paper a self-adjusting terminal connector based on shape memory alloy is developed to enhance a common screw terminal by the integration of a SMA cylinder and the terminal connector is then evaluated regarding its performance and capability.
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Xu, Ming, James Yang, Isador H. Lieberman, and Ram Haddas. "Comparison of Fatigue Behaviors of Spinal Implants Under Physiological Spinal Loads: A Finite Element Pilot Study." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67783.

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The fusion surgery is a standard treatment for scoliosis. Fatigue-related failure is one common cause for the fusion surgery implant. Due to the high cost of revision surgery, it is of clinical value to study the fatigue behaviors of the spinal implants under physiological spinal loads. In the literature, biomechanical tests and finite element (FE) methods have been used to study the fatigue of the spinal implants. Compared with biomechanical tests, FE analysis has the advantage of low cost and high efficiency. Due to the high computational cost, no FE study has been modeled the exact geometry of the pedicle screw (including the thread) in the screw-bone connection within the multi-level spine FE model. This study introduced a feasible FE-based method to predict the fatigue behaviors of the spinal implants with exact geometry of pedicle screw. One previously-validated FE spine model was utilized to provide physiological spinal loads and was bilaterally fused with pedicle screws and rods at L3-L4 spine levels. The exact geometry of the pedicle screw was simulated in this study for accurate stress prediction. The fused spine FE model was subjected to six loading directions (flexion/extension, left/right lateral bending, and left/right axial rotation). For each loading direction, a pure bending moment of 10 Nm was tested. First, FE analysis was performed for one loading cycle. Range of motion, maximum von Mises stress values of the spinal implants were recorded and compared for the six tested loading conditions. Then, based on the stress/strain history of the spinal implants for one loading cycle provided by the FE simulation, fatigue life cycles of the spinal implants were calculated using strain-based Smith-Watson-Topper equation. Flexion produced the largest range of motion at the adjacent level. Axial rotation produced the largest von Mises stress in the spinal implants. Except for lateral bending, the von Mises stress predicted in the screws fused at the superior vertebra was larger than that in the screws fused at inferior vertebra. The method introduced in this study will be used to study different screw fixation methods in the future work.
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Guggolz, D., S. K. Manoharan, and C. Friedrich. "Avoiding of Self-Loosening in Components With Multiple Screw Joints." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-50369.

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Self-loosening of fastened systems is known as a severe damage mechanism besides the loss of preload due to relaxation and as a result of this the failure of the joint. Main problem is, that self-loosening mostly leads to a rapid preload loss when occurs. In the 1970s first systematic investigations due to this are reported from Junker et al. using a transverse-vibrational test stand [13]. Nowadays numeric calculation approaches are available (e.g. [12]). All approaches show that very small displacements from loading before complete sliding are sufficient to induce self-loosening — which is a screw rotation against its tightening direction without material rupture of the screw. Today the mechanism of self-loosening under uni-axial transverse load of single-screwed joints with plain bearing surface is understood and predictable. Also combined loads of vibration and rotation became the focus of university-based research. The challenge is to transfer the knowledge about the mechanism to component fastened systems with multi-screw joints. The fundamental mechanism is not sufficient for component design. This is the reason why up to now no prediction in advance is established in guidelines. First, this paper shows the time-sequence of self-loosening in general with its different stages. The second step is to work out important influences on self-loosening which will be shown by existing calculations. Then a stress-based calculation and a better criterion for self-loosening will be developed. Next step, if analytics come to their limits, is the numeric simulation of system behavior. With this the critical preload for self-loosening must be determined to ensure safety of the connection. Following from this screw joints can be dimensioned without risk of self-loosening. The simulation procedure includes right modelling with boundary conditions as well as defining evaluation procedure for a ‘self-loosening-safety-margin’. With simulation of a single-screw joint it gets clear that either analytical or numerical approach can be used. But already for two screws in a fastened system the limits of known equations become obvious. Finally, results of a vibrational test are shown before conclusions and outlook.
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Chen, Ping, and Cong Luo. "Improved Design of End Closure for Screw Locking Ring U Shaped Tube Heat Exchanger." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78620.

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This paper describes an improved design of end closure for screw locking ring U-shaped tube heat exchanger used in oil-refining process with use of the D-section shearing bolts as its load-carrying connectors between the tube channel cover and the top flange instead of the connection by acme screw locking ring and the strength calculating method for its main load-carrying components and an comparison with two others are presented. This new construction has the features of compacted design, saving material and easy assembling and disassembling etc.
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Yu, Lei, and Suzhen Li. "Acoustic Emission (AE)-Based Leak Detection of Galvanized Steel Pipe Due to the Defects of the Screw Thread Connection." In International Conference on Pipelines and Trenchless Technology 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413821.027.

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