Relevant bibliographies by topics / Bolted joints Joints (Engineering)

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  2. Dissertations / Theses
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Academic literature on the topic 'Bolted joints Joints (Engineering)'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Bolted joints Joints (Engineering)"

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Qin, ZY, QK Han, and FL Chu. "Analytical model of bolted disk–drum joints and its application to dynamic analysis of jointed rotor." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 4 (May 9, 2013): 646–63. http://dx.doi.org/10.1177/0954406213489084.

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Bolted joints are widely used in aero-engines. One of the common applications is to connect the rotor disks and drums. An analytical model for the bending stiffness of the bolted disk–drum joints is developed. The joint stiffness calculated using the analytical model shows sound agreement with the calculation obtained based on finite element analyses. The joint stiffness model is then implemented into the dynamic model of a simple rotor connected through the bolted disk–drum joint. Finally, the whirling characteristics and steady-state response of the jointed rotor are investigated to evaluate the influence of the joint on the rotor dynamics, where the harmonic balance method is employed to calculate the steady-state response to unbalance force. The simulation results show that the joint influence on the whirling characteristics of the rotor system can be neglected; whereas, the presence of the bolted disk–drum joint may lead to a decrease in the rotor critical speeds due to the softening of the joint stiffness. The proposed analytical model for the bolted disk–drum joints can be adopted conveniently for different types of rotor systems connected by bolted disk–drum joints.
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Lin, Hang, Penghui Sun, and Yifan Chen. "Shear Strength of Flat Joint considering Influencing Area of Bolts." Advances in Civil Engineering 2020 (November 12, 2020): 1–12. http://dx.doi.org/10.1155/2020/8878432.

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Bolt is popular in the reinforcement of geotechnical engineering, which can significantly improve the strength and stability of jointed rock mass. For bolted joint, the bolting area is a certain scope instead of the entire joint surface; therefore, it is necessary to study the effect of bolt influencing area on the shear strength of rock joints. In this paper, a series of laboratory direct shear tests were executed on the bolted joints to explore the influence of bolts on the joint shear strength, as well as the influencing area of bolt. Via successively changing bolting angle and bolt number, the shear stress-shear displacement curves of bolted joints were recorded and the variation law of shear strength was analyzed. Based on the assumption of the circular influencing area of bolt, the influence coefficient m (defined as the diameter ratio of the influencing area to the bolt) was introduced to establish the theoretical calculation model of the shear strength of bolted joint, which was verified by test results. Furthermore, the value of m was changed, and the shear strengths of bolted joints under different bolting condition were calculated to compare with the test results. The average relative error Eave was selected to determine the optimal value of m under the corresponding bolting condition, and it tends to sufficiently small values under the case of m > 30 for one-bolted joint and m > 25 for two-bolted joint, as well as m > 20 for three-bolted joint, which demonstrates that m can be applied to effectively calculate the actual influencing area of bolt.
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Omar, R., M. N. Abdul Rani, and M. A. Yunus. "Representation of bolted joints in a structure using finite element modelling and model updating." Journal of Mechanical Engineering and Sciences 14, no. 3 (September 30, 2020): 7141–51. http://dx.doi.org/10.15282/jmes.14.3.2020.15.0560.

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Efficient and accurate finite element (FE) modelling of bolted joints is essential for increasing confidence in the investigation of structural vibrations. However, modelling of bolted joints for the investigation is often found to be very challenging. This paper proposes an appropriate FE representation of bolted joints for the prediction of the dynamic behaviour of a bolted joint structure. Two different FE models of the bolted joint structure with two different FE element connectors, which are CBEAM and CBUSH, representing the bolted joints are developed. Modal updating is used to correlate the two FE models with the experimental model. The dynamic behaviour of the two FE models is compared with experimental modal analysis to evaluate and determine the most appropriate FE model of the bolted joint structure. The comparison reveals that the CBUSH element connectors based FE model has a greater capability in representing the bolted joints with 86 percent accuracy and greater efficiency in updating the model parameters. The proposed modelling technique will be useful in the modelling of a complex structure with a large number of bolted joints.
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Stephen, JT, MB Marshall, and R. Lewis. "Relaxation of contact pressure and self-loosening in dynamic bolted joints." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 18 (May 5, 2016): 3462–75. http://dx.doi.org/10.1177/0954406216645130.

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Bolted joints are widely used in a variety of engineering applications where they are dynamically loaded with frequencies of vibration spread over a wide spectrum with the same general effects. When under dynamic loading, bolted joints can become loose due to a loss in clamping pressure in the joints. This vibrational loosening sometimes can cause serious problems, and in some cases can lead to fatal consequences if it remains undetected. Non-intrusive ultrasonic and image processing techniques were simultaneously used to investigate the relaxation of contact pressure and loosening of bolted joints subjected to cyclic shear loading. Three critical areas, the contact interface of the bolted component, the bolt length and the rotation of the bolt head, were monitored during loosening of the joints. The results show that loosening of bolted joints can be grouped into three stages: very rapid, rapid, and gradual loosening. The earliest stage of the loosening of bolted joints is characterised by cyclic strain ratcheting–loosening of the bolted joint during vibration without rotation of the bolt head. The higher the rate of relaxation at this early stage, the lower is the resistance of the bolted joint to vibration-induced loosening. Both the dynamic shear load and an additional constant shear load in another direction were observed to affect the rate of loosening, and at this early stage, a rise in the magnitude of the additional constant shear load increases the rate of loosening. Furthermore, the contact pressure distribution affects the rate of loosening at the bolted joint interface, as loosening increases away from area of high contact pressure.
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Dravid, Shriram, Kartikeya Triphati, and Manoj Chouksey. "Experimental study of loosening behavior of plain shank bolted joint under dynamic loading." International Journal of Structural Integrity 6, no. 1 (February 2, 2015): 26–39. http://dx.doi.org/10.1108/ijsi-09-2013-0024.

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Purpose – Bolted joints are commonly used to connect structural members. These joints can be disassembled whenever required. Various types of washers are used between nut and the connected member to keep the joints tight. However, these joints often become loose over time under dynamic loading conditions. The purpose of this paper is to know the reasons of loosening of bolted joints and to identify the main parameters that contribute to the bolt loosening, and to verify them with previous work. Design/methodology/approach – This work studies loosening of bolted joint in a test rig under varying tightening torque as well as for various types of washers used as the number of load cycles increases. Four trial runs are taken for each case considered and the average results are found out to minimize possible sources of errors. For the purpose, a specifically made test rig is used which is capable of applying harmonic load on the bolted joint by the lever action. Findings – The study compares the loosening of bolted joint with and without washer, and also under different initial tightening conditions. This study has shown the suitability of the test rig, methodology and parameters for study of loosening in bolted joints. This study presents an indigenous test, capable of applying harmonic load on bolted joint. Originality/value – The results establish that the methodology and parameters selected were appropriate for the purpose of study of loosening of bolted joints. This study has provided a base line for further work to understand the loosening of bolted joints.
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Hayman, Edward, and Clyde Neely. "Solving the Puzzle of Bolted Joints." Mechanical Engineering 133, no. 06 (June 1, 2011): 48–52. http://dx.doi.org/10.1115/1.2011-jun-5.

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This article discusses the various ways of solving the puzzle of bolted joint assembly. In 2001, The PCC-1-2000 Guidelines for Pressure Boundary Bolted Flange Joint Assembly presented with knowledge and practices specific to the assembly of bolted flange joints. The puzzle solution that came from this box was the most definitive to date and allowed those dealing with bolted joints to assemble the variables by methods that had been used successfully for many years by many people. This document is helping people across industry not only to assemble bolted flange joints, but also to establish joint integrity programs, procedures, and best practices. PCC-1-2010 shifts the emphasis to gasket stress and gasket type and provides instruction and information pertinent to bolt torque values. The 2010 document contains, for instance, a whole section on bolt stress—the unit load that should be put on the bolts—and includes tables as well.
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Naraghi, Tahereh, and Ali S. Nobari. "A novel method for the identification of a model for the nonlinear characteristic of a bolted lap-joint." Journal of Vibration and Control 23, no. 3 (August 9, 2016): 484–500. http://dx.doi.org/10.1177/1077546315581238.

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Joints are the main source of nonlinearity and energy dissipation in large assembled structures which could be otherwise considered as linear. Consequently, modeling and parameter identification of joints play a significant role in any successful design and finite element (FE) modeling of structures. In the present research, an identification procedure is proposed for the modeling of the nonlinear behavior of a bolted joint. The main emphasis are placed on the simplicity of the experimental procedures involved as well as ease of incorporation of the identified model in the FE model of the structure. Using the concept of the optimum equivalent linear frequency response function, structure was excited by two levels of random force, at two bolt preload levels, and then the eigen values of the nonlinear structure and the inverse eigen-sensitivity identification technique are used, in order to identify the nonlinear properties of bolted joints. The results of implementing the method are promising and indicative of the fact that, in contrast to static Iwan’s model of a bolted joint, the equivalent dynamic characteristics of a bolted joint may be frequency dependent, as the different modes will affect the interface zone of the jointed structures in a different manner.
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Zhai, Xue, Cheng-Wei Fei, Jian-Jun Wang, and Xing-Yu Yao. "Parametric modeling and updating for bolted joints of aeroengine casings." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 16 (August 9, 2016): 2940–51. http://dx.doi.org/10.1177/0954406215607900.

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To establish accurate finite element (FE) model of bolted joint structures of aeroengine stator system (casings), this work implements the parametric FE modeling and updating of bolted joints of aeroengine stator system with multi-characteristic responses (multi-object). Firstly, the parametric FE modeling approach of bolted joint structure was developed based on the thin layer element method. And then the FE model updating thought of aeroengine stator system was developed based on the probabilistic analysis method. Finally, the parametric modeling and updating of the bolted joints of aeroengine stator system with multi-characteristic responses was completed by the optimization iteration calculation of objective function based on the proposed methods and the static stiffness testing data. Through the parametric modeling of bolted joint structures based on the thin layer method, the complexity of FE model of aeroengine casings with many bolted joint structures is reduced. As shown in the FE model updating of casings with multi-characteristic responses analysis, the static stiffness from the updated model are very close to the test data, in which the maximum relative error decreases to 3.9% from 30.52% and the others are less than 3%, so that the design precision of aeroengine stator system with the many and wide variety of bolted joints gets a great improvement. Moreover, the proposed methods of parametric modeling and model updating for multi-characteristic responses are validated to be effective in the simulation and equivalent of the mechanical characteristics of bolted joints in complex systems like aeroengine stator system.
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Yu, Da Zhao, Yue Liang Chen, Zhong Hu Jia, Yong Gao, and Wen Lin Liu. "Parametric Analysis Mechanical Properties of Bolted Joints." Advanced Materials Research 97-101 (March 2010): 3924–27. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.3924.

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Three-dimensional finite element model of a bolted joint has been developed in the non-linear finite element code MSC.Marc and attempts were made to validate it by comparing results with those of experiments and other finite element. Issues in modeling the contact between the joint parts, which affect the accuracy and efficiency of the model, were presented. Experimental measurements of surface strains and load transfer ratio(LTR) were compared with results from finite element analysis. The results show that three-dimensional finite element model of bolted joint can produce results in close agreement with experiment. Three-dimensional effects such as bolt titling, seconding and through-thickness variations in stress and strain are well represented by such models. Three-dimensional finite element analysis was also used to study the effects of different parameters on the mechanical behaviour of single lap bolted joints. The results show that straight hole, small bolt diameter, and big hole pitch are selected first for bolted joint if other conditions allowed, and effect of bolt material on LTR of joint is small for small load. Interference and pre-stress should be strictly controlled for bolted joints in order to attain the best fatigue capability of lap joint.
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Guo, Tie Neng, Bin Song, Dong Liang Guo, and Zhong Qing Chen. "Dynamic Stiffness Identification of Bolted Joints." Advanced Materials Research 291-294 (July 2011): 1582–88. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.1582.

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The joint has a significant effect on the dynamic characteristic of the mechanism, and the identification of the stiffness of the joints has become a key problem. In this paper, a method is presented for identifying the dynamic characteristic of joints. An experiment is designed to test the dynamic parameter of the bolted joints specimen; the identification method, based on experiment, has a high accuracy result. By taking a specimen to experiment and identify the dynamic characteristic of joints, the relationship between the preload on the bolts and the joints stiffness is acquired. In order to validate the accuracy of the result, the FEM software is used to simulate. There are only a small discrepancy between the results of identification and simulation.
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Dissertations / Theses on the topic "Bolted joints Joints (Engineering)"

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Page, Steven M. "Investigation into the Behavior of Bolted Joints." Wright State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=wright1163527930.

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Choudhury, Marcel. "Member stiffness of bolted joints." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/17882.

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Chen, Zao. "Pull-through failure of bolted composite joints." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119398.

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The design and certification of composite aircraft structures requires extensive and costly testing of bolted joints since no robust predictive tools are available. The majority of investigations in this field focus on the shear loading of bolted carbon fibre-reinforced polymer matrix composites while studies on the behaviour of pull-through are limited. Thus, this work presents an extensive investigation of the factors affecting bolted composite panels subjected to out-of-plane loading with the objective to develop a semi-empirical predictive model. First, an experimental investigation is presented where the influence of fastener size and laminate thickness was systematically studied. The effect of the laminate layup and fastener clamping torque was also examined. Specimens manufactured from out-of-autoclave carbon-epoxy prepregs were transversely loaded in an electromechanical testing machine. The load-displacement response was measured and the failure mechanisms were examined by optical microscopy. Relatively thick specimens were used to ensure that the head depth of the countersink fasteners did not exceed seventy percent of the laminate thickness. Second, numerical analysis was conducted to predict joint failure by using a simplified axisymmetric 3-D finite element approach. Contact elements were used under the region of the fastener head and the failure was predicted using the maximum principal strain criterion. The experimental results showed that failures were dominated by inter-ply delamination and through-thickness shear failure of the laminate. A conical damage zone was found under the fastener head with damage radially dispersed from the fastener hole. The opening angles of the cones varied with the fastener head geometry. The load-displacement behaviour was affected by the fastener type. The finite element analysis showed that a concentrated shear stress area under the fastener head caused the cone damage initiation. Maximum fibre direction stresses and out-of-plane shear were both found near the fastener hole on the opposite side of the loading face. Transverse deformation and inter-laminar shear caused the final failure in the form of inter-ply delamination. The numerical analysis also indicated that the pull-through load resistance was more sensitive to the contact area under the fastener head and the head geometry than to the fastener shank size. Finally, a semi-empirical equation for the prediction of the pull-through resistance that includes the joint characteristic factors was developed.
La conception et la certification des structures aéronautiques en matériaux composites avec assemblages boulonnés nécessitent un important programme de tests très coûteux car il n'existe pas d'outils de prédiction robuste de la rupture des joints boulonnés. La majorité des études dans ce domaine portent sur la résistance en cisaillement des boulons alors que les études sur le comportement hors plan des assemblages boulonnés sont très limitées. Ainsi, cette thèse présente une étude approfondie des facteurs affectant les assemblages boulonnés en matériau composite soumis à des charges hors plan avec l'objectif de développer un modèle semi-empirique de la charge de rupture du joint. Premièrement, une étude expérimentale est présentée où l'influence du diamètre du boulon et de l'épaisseur du laminé est menée de façon systématique. L'effet de la configuration du laminé et du couple de serrage a aussi été étudié. Des échantillons fabriqués hors-autoclave composés de fibres de carbone pré-imprégnées d'une matrice époxy ont été chargés transversalement dans la machine d'essai électromécanique. La courbe force–déplacement a été mesurée et les mécanismes de rupture ont été examinés par microscope optique. Des échantillons relativement épais ont été utilisés pour s'assurer que l'épaisseur de la tête du boulon n'excède pas soixante-dix pourcent de l'épaisseur du laminé. Deuxièmement, des simulations numériques par la méthode des éléments finis ont été effectuées afin de prédire la rupture de l'assemblage en utilisant un modèle 3-D axisymétrique simplifié. Des éléments de contact ont été utilisés sous la région de la tête de vis et la rupture a été prédite en utilisant le critère de déformation principale maximale. Les résultats expérimentaux ont montré que les mécanismes de rupture comportent un délaminage inter-pli et un cisaillement à travers l'épaisseur du laminé. Une zone d'endommagement conique a été observée sous la tête du boulon avec des fissures réparties radialement autour du trou. Les angles d'ouverture des cônes varient selon la géométrie de la tête de vis. Le comportement charge-déplacement variait en fonction du type de boulon. L'analyse par éléments finis a démontré qu'une concentration de contraintes de cisaillement située sous la tête du boulon causait l'initiation des dommages conique. Les contraintes de tension maximale et de cisaillement hors-plan ont été observées près du trou, du côté opposé de la charge. La déformation transversale et le cisaillement inter-laminaire causent la rupture finale sous forme de délaminage inter-pli. Le modèle numérique indique également que la résistance au chargement hors plan est plus sensible à la région de contact sous la tête du boulon et sa géométrie. Finalement, une équation semi-empirique pour prédire la résistance hors plan des joints boulonnés a été développée.
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Schmitt, Ron R. "Viscoelastic relaxation in bolted thermoplastic composite joints." Thesis, Wichita State University, 1991. http://hdl.handle.net/10057/3988.

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Results from a research program to investigate the long term effects of through-the-thickness fastener clamp-up force (preload) relaxation on the strength of mechanically fastened joints for two graphite/thermoplastic composite materials (Dupont's IM6/KIII and ICI-Fiberite's IM8/APC(HTA)) are summarized and compared with analytical methods. An experimental program was conducted in which 56 mechanically fastened single-shear joints were tested. Phase I static tests established joint bearing strength as a function of clamp-up force for two types of fasteners (protruding head and countersink) with no relaxation of preload. Phase II testing monitored short-term fastener preload relaxation (up to 1 ,000 hours), with special bolt force sensor washers. Inservice parameters included were temperature, in-plane loads, and torque. The jOints were tested to failure at the end of the relaxation time period to determine any subsequent effect on joint strength. Phase I test results indicated that joint bearing strength increased by as much as twenty-eight percent over the clamp-up force range of a Ibs (fingertight) to 3,500 Ibs for both materials. Fastener head type, material, and temperature also affected the resultant bearing strength. For Phase II, fastener clamp-up force at room temperature (78°F) relaxed an average of six percent from the initial value during the short-term test period. The relaxation was projected to be as high as fourteen and sixteen percent at 100,000 hours for HTA and Kill, respectively. The elevated temperature condition (250°F) significantly increased the relaxation rate with the projected 100,000 hour relaxation amount being as high as thirty-seven percent for HTA and sixty percent for Kill. Comparison of the Phase II bearing strengths to the Phase I results indicated that portions of the data correlated well, while others did not. It was concluded that relaxation of the clamp-up force over the short-term time period did not significantly lower the bearing strength of either material, however an extended exposure to 250°F could affect the bearing strength.
Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Aerospace Engineering.
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Wentzel, Sten Henrik Vilhelm. "Models and mechanisms of dissipation in bolted joints." Licentiate thesis, Stockholm, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4326.

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Tilaveridis, Ioannis. "Detection of friction variations in bolted joints during tightening." Thesis, KTH, Reglerteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213389.

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Tightening describes the process of rotating a screw with the purpose of binding two surfaces together. It is widely applied in the assembly process of structures, where bolted joints are used to connect the different parts with each other, e.g. robot arms, vehicles, aircrafts. A certain torque is applied with a tool in order to develop the desired clamping force that keeps the surfaces together. A challenge during this process is the fact that friction variations occur unexpectedly, thus increasing the risk of not achieving the necessary clamping force to ensure successful tightening. In this thesis, a diagnosis method is implemented in order to detect friction variations during highly dynamic tightening. Different detection algorithms are investigated (e.g. CUSUM, Particle Filter, Linear regression), and an approach that makes use of the torque and angle signals while estimating the clamping force is implemented. Investigations of signal noise and filtering operations during data extraction are conducted, and the signal channels are evaluated with regards to accuracy and noise bias. An approach using a sliding window is used to estimate the torque rate, and the CUSUM detection algorithm is implemented to indicate variations and provide a diagnostic report. The analysis is performed using a highly dynamic tightening strategy programmed in an electrical tightening tool, allowing for the process to be conducted in milliseconds. Investigations of the tuning parameters of the detection algorithm are also conducted, and value thresholds are identified. Finally, a statistical analysis of the system’s behaviour, as well as the influence of the operator holding the tool, is performed for evaluation.
Åtdragning beskriver processen att rotera en skruv i syfte att binda två ytor ihop. Det tillämpas allmänt i monteringsprocessen av strukturer, där skruvförband används för att ansluta de olika delarna med varandra, t.ex. robotarmar, fordon, flygplan. Ett visst vridmoment appliceras med ett verktyg för att utveckla önskad klämkraft som håller ytorna ihop. En utmaning under denna process är att friktionsvariationer uppträder oväntat, vilket ökar risken för att inte uppnå den nödvändiga klämkraften för att säkerställa en framgångsrik åtdragning. I denna avhandling implementeras en diagnosmetod för att detektera friktionsvariationer vid hög dynamisk åtdragning. Olika detekterings algoritmer undersöks (t.ex. CUSUM, Partikelfilter, Linjärregression), och ett tillvägagångssätt som utnyttjar vridmoment- och vinkelsignalerna vid uppskattning av klämkraften implementeras. Undersökningar av signalbrus samt filtreringsoperationer under datautvinningen utförs, och signalerna utvärderas. Ett variabelt fönster används för att uppskatta vridmomentet, som används i detekteringsalgoritmen för att indikera variationer och utföra en diagnostisk rapport. Analysen utförs med en starkt dynamisk åtdragningsstrategi, programmerad i ett elektriskt åtdragningsverktyg, vilket gör att processen kan utföras på millisekunder. Undersökningar av parametrarna för detekteringsalgoritmen genomförs också, och värdetrösklarna identifieras. Slutligen utförs en statistisk analys av systemets beteende, liksom påverkan av operatören som håller verktyget, för utvärdering.
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Grosse, Ian R. "Nonlinear axial stiffness characteristics of axisymmetric bolted joints." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/82622.

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A critical assessment of the current design theory for bolted joints which is based on a linear, one-dimensional stiffness analysis is presented. A detailed nonlinear finite element analysis of a bolted joint conforming to ANSI standards was performed. The finite element results arc presented in the classical bolted joint diagram and compared with the linear theory. The results revealed that the joint stiffness is highly dependent on the magnitude of the applied load. The joint stiffness changes continuously from extremely high for small applied loads to extremely low for large applied loads, contrary to the constant joint stiffness of the linear theory. The linear theory is shown to be extremely inadequate in characterizing the joint stiffness. The significance of the results in terms of the failure of bolted joints is discussed. Straight-forward analytical procedures are proposed for establishing estimates of the nonlinear stiffness description and the associate bolt loading in fatigue environments. The linear theory should be discarded and the more accurate nonlinear joint description be used. These results also provide the finite element community an improved model for the interconnection of substructures. The two-dimensional, axisymmetric finite element model includes bilinear gap elements to model the interfaces. Special orthotropic elements were used to model the bolt/nut thread interaction. A free-body-diagram approach was taken by applying loads to the outer diameter of the joint model which correspond to internal, uniformly distributed line-shear and line-moment loads in the joint. A number of convergence studies were performed to validate the solution.
Ph. D.
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Lutz, Cyprien. "Structural integrity of bolted joints for pultruded GRP profiles." Thesis, University of Warwick, 2004. http://wrap.warwick.ac.uk/110311/.

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Presented in this thesis is a combined physical testing and computational modelling programme of research for the structural integrity of bolted joints for Pultruded Fibre Reinforced Polymer (PFRP) profiles. The work was carried out in a joint EPSRC funded Structural Integrity (SI) project between the Universities of Warwick and Lancaster. It will be shown in the thesis that it provides a significant new body of scientific understanding and relevant independent joint test data, which can be used in the future preparation of design guidance for the safe and rational design of joints. The contribution from the author to this SI project on plate-to-plate steel bolted joints can subdivided into four parts. The first part includes the evaluation of the 10 single-bolted and the 5 multi-bolted double lap-joint test series that appeared before 2001. This identifies that the 15 test series, from 10 centres, are often different because the researchers chose different parameters to study. Of the 800 concentric strength tests 640 were single-bolted and 160 were multi-bolted. It is noteworthy that few of these previous tests include environmental conditioning of the joints. A review of design methods is given in this part of the thesis. This shows that significant joint test data is required to appraise SI design methods for PFRP bolted joints, such as presented in the EUROCOMP Design Code and Handbook of 1996 and in 1981 by Hart-Smith. The EUROCOMP simplified and rigorous methods are expected to be generic and involve damage tolerance to increase the strength of the joint design. It is further found that application of these methods requires Finite Element (FE) stress calculations for the target analysis due to bolt bearing, and for the source analysis, for multi-bolted joints, to determine the bolt load distribution and by-pass loads. Parts two and three of the contribution from the author are combinations of experimental and FE analysis work that focuses on the target and the source problems, respectively. The strain field close to a notch is measured in part two using a pin-bearing test method and strain gauged specimens. To find out if FEA can predict the target strains/stresses an ABAQUS© FE model is developed. The PFRP material is assumed to be homogeneous and possess orthotropic properties. It is shown that a linear elastic analysis, with contact and friction modelled, gives strains that are similar to those measured. This observation is supported by a small photo-elastic strain analysis using the GFP 1000 system from Stress Photonics. By way of the evaluation of previous testing in part one it was decided in part three to conduct a comprehensive series of multi-bolted joint tests. Constant variables in this series of concentric loaded tests are the PFRP material, the plate thickness, the material orientation, the bolt diameter, the clearance hole size, and the bolt torque. This test series, design using a method by Taguchi, comprised four different joint configurations, twelve different joint geometries and four different environmental conditionings (including a temperature of 60oC and ‘wet’ ageing for 1000hrs). The author presents the testing procedure and 432 resistance results for 144 different joints, having a batch size of three. Mechanisms and modes of failure are identified, and several unrelated to the distinct modes of bearing, shear-out and net-tension used in current design approaches are presented. Using this fairly large number of consistent data points an evaluation is made on the influence of the various variables. It is shown that is not straightforward to establish simple strength trends. Furthermore, the findings of this test series suggest that a batch size of three is too small, as batch strength variability is relatively high. By way of a Round-Robin exercise between the two Universities, with joints having a batch size of 10, it is shown that the high strength variability can be associated with the non-homogeneity of the reinforcement arrangement in the PFRP material. Two multi-bolted joints having three rows of three bolts are instrumented with strain gauges to determine the strain distributions linked to bolt load distribution and by-pass loads. Measured strains are compared to numerical predictions from an ABAQUS FE analysis using the same modelling methodology as for the pin-bearing target analysis. The source analysis comparison is acceptable, but like many of the results presented in the thesis it appears likely that the experimental measurements are affected by the non-homogeneity in the macrostructure of the PFRP. Presented in part four is a preliminary appraisal of the EUROCOMP simplified design method and the Hart-Smith design method. The EUROCOMP method is shown to possess deficiencies, via a critique by Lancaster University, which indicates that it cannot be used in practice. By taking information from the multi-bolted joint test series in part three the author constructs semi-universal design charts using the Hart-Smith method, which can be used to design joints with changing geometry. An important finding from this preliminary appraisal is that the SI design methods are difficult to apply since they require lots of physical test data and relevant and reliable stress results from FEA. Finally, despite the programme of research providing a significant new body of scientific understanding and relevant independent joint test data it is concluded that further work is needed before an SI method for the universal design of plate-to-plate PFRP bolted joints can be considered for a code of practice.
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Elflah, Mohamed A. Hussaen. "Structural behaviour of stainless steel bolted beam to column joints." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8545/.

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Initially, two experimental programmes studying the structural behaviour of stainless steel beam-to-open column joints and beam-to-tubular column joints under static loads are reported in detail. The joint configurations tested include flush and extended end plate connections, top and seat cleat connections and top, seat and web cleat connections. The full moment-rotation characteristics are reported in detail. It is observed that the connections displayed excellent ductility, superior than that of equivalent carbon steel connections, and attained loads much higher than the ones predicted by design standards for carbon steel joints. Nonlinear FE models have been developed and validated against the experimental results. The FE models are shown to accurately replicate the experimentally determined, initial stiffness, ultimate resistance, overall moment-rotation response and observed failure modes. In addition, a comprehensive parametric study is conducted. The design rules for stainless steel connections, which are based on the specifications of EN 1993-1-8 for carbon steel joints, are reviewed and are found to be overly conservative in terms of strength and inaccurate in terms of stiffness thus necessitating the development of novel design guidance in line with the observed structural response. Hence, simplified mechanical models in line with the observed response are developed.
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Kradinov, Vladimir Y. "Optimum design of bolted composite lap joints under mechanical and thermal loading." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280296.

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A new approach is developed for the analysis and design of mechanically fastened composite lap joints under mechanical and thermal loading. Based on the combined complex potential and variational formulation, the solution method satisfies the equilibrium equations exactly while the boundary conditions are satisfied by minimizing the total potential. This approach is capable of modeling finite laminate planform dimensions, uniform and variable laminate thickness, laminate lay-up, interaction among bolts, bolt torque, bolt flexibility, bolt size, bolt-hole clearance and interference, insert dimensions and insert material properties. Comparing to the finite element analysis, the robustness of the method does not decrease when modeling the interaction of many bolts; also, the method is more suitable for parametric study and design optimization. The Genetic Algorithm (GA), a powerful optimization technique for multiple extrema functions in multiple dimensions search spaces, is applied in conjunction with the complex potential and variational formulation to achieve optimum designs of bolted composite lap joints. The objective of the optimization is to acquire such a design that ensures the highest strength of the joint. The fitness function for the GA optimization is based on the average stress failure criterion predicting net-section, shear-out, and bearing failure modes in bolted lap joints. The criterion accounts for the stress distribution in the thickness direction at the bolt location by applying an approach utilizing a beam on an elastic foundation formulation.
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Books on the topic "Bolted joints Joints (Engineering)"

1

Bickford, John H. An introduction to the design and behavior of bolted joints. 2nd ed. New York: M. Dekker, 1990.

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An introduction to the design and behavior of bolted joints. 3rd ed. New York: Marcel Dekker, 1995.

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Fox, David M. Bolted joint studies in GRP. Springfield, Va: Available from National Technical Information Service, 1994.

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Research Council on Structural Connections (U.S.). Specification for structural joints using ASTM A325 or A490 bolts. Chicago, IL: American Institute of Steel Construction, 2000.

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), Research Council on Structural Connections (U S. Specification for structural joints using ASTM A325 or A490 bolts. Chicago, IL: American Institute of Steel Construction, 1996.

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M, Murray Thomas. Flush and extended multiple-row moment end-plate connections. Chicago, IL: American Institute of Steel Construction, 2002.

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Steurer, Anton. Das Tragverhalten und Rotationsvermögen geschraubter Stirnplattenverbindungen. Basel: Birkhäuser, 1999.

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Binder, Bettina. Kontaktalgorithmen für Traglastberechnungen geschraubter Anschlusskonstruktionen im Stahlbau. Hannover: Universität Hannover, Institut für Statik, 1991.

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Soltis, Lawrence A. Bearing strength of bolted timber joints. [Madison, WI: U.S. Forest Products Laboratory, 1987.

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Kulak, Geoffrey L. Guide to design criteria for bolted and riveted joints. 2nd ed. New York: Wiley, 1987.

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Book chapters on the topic "Bolted joints Joints (Engineering)"

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Zhang, Yufen, and Degang Guo. "Blind Bolted T-Plate Joints in Prefabricated Construction." In Springer Tracts in Civil Engineering, 203–31. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8089-5_9.

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Ajimituhuo, J. L., and O. S. Abejide. "Probabilistic Shear Strength of Bolted Joints in Offshore." In Advances and Challenges in Structural Engineering, 354–69. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01932-7_28.

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Romaniuk, Volodymyr, and Volodymyr Supruniuk. "Influence of Flexibility of Bolted Joints on Rigity of the Hingeless Frame." In Lecture Notes in Civil Engineering, 371–77. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57340-9_45.

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Shimamura, Yoshinobu, Keiko Oda, Akira Todoroki, Hideo Kobayashi, and Takaomi Inada. "Application of Electric Resistance Change Method to Damage Detection of CFRP Bolted Joints." In Key Engineering Materials, 653–58. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-978-4.653.

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Soleimanpour, Reza, Alex Ng, Abbas Amini, and Sayed Mohammad Soleimani Ziabari. "Application of Nonlinear Guided Waves for Detecting Loose Flanged Bolted Joints in Pipelines." In Lecture Notes in Civil Engineering, 129–39. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64594-6_14.

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Paroissien, Eric, Marc Sartor, and Jacques Huet. "Hybrid (Bolted/Bonded) Joints Applied to Aeronautic Parts: Analytical One-Dimensional Models of a Single-Lap Joint." In Advances in Integrated Design and Manufacturing in Mechanical Engineering II, 95–110. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6761-7_7.

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Giuseppe, Marannano, and Restivo Gaetano. "A Fiber Optic Strain Gage Sensor for Measuring Preload in Thick Composite Bolted Joints." In Lecture Notes in Mechanical Engineering, 540–51. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31154-4_46.

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Voyachek, I. I., D. V. Kochetkov, and S. G. Mityasov. "Rational Provision of Robustness Properties of Bolted Joints of Assembly with Implementation of Anaerobic Materials." In Lecture Notes in Mechanical Engineering, 163–70. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22063-1_18.

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Shah, Pritesh, and Ravi Sekhar. "Predictive Modeling and Control of Clamp Load Loss in Bolted Joints Based on Fractional Calculus." In Lecture Notes in Electrical Engineering, 15–32. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6977-1_2.

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Sakura, R., H. Moriyama, and T. Yamaguchi. "Bearing Limit State of High-Strength Frictional Bolted Joints Consisted of Several Bolts Based on Bolt Hole Deformation." In Lecture Notes in Civil Engineering, 1453–66. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8079-6_135.

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Conference papers on the topic "Bolted joints Joints (Engineering)"

1

Amir, Yosef. "Bolted Joints-Stochastic Modeling." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-65548.

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In general, prediction behavior of bolted joints is very complex due to the uncertainty nature parameters involved in the design. Particularly, bolted Joints under shear load; the coefficient of friction plays a big role in prediction of joint movement. The analytical method of the Extreme Value method is utilized by applying a well-known worst case scenario like VDI 2230 and is sufficient for most of general purpose bolted joint analysis. However, there are cases of bolted joints where this method could leads to a false prediction of bolted joint failures. This paper applies stochastic method in the design of bolted joint modeling. As an example of this method case study of a critical bolted joint to safety presented, the model simulation assumed probabilistic functions for sensitive variables with significant variance like coefficient of friction, preload scatter, and embedment. The simulation presented the prediction of the preload required to sustaining the joint members of no relative movement with a level of 99.97% confidence. Comparisons of extreme value method to stochastic highlighted the cases of benefit to use both methods.
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Amir, Yosef, Saravanakumar Iyyanar, Aravind Devali, and Muniratnam Kumar. "Bending Effect in Concentric Bolted Joints Under Transverse Load." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63201.

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Bending stress calculation in eccentric bolted joints is a well-known process in the design of bolted joints. However, in a concentric bolted joint with transverse load, the existence of bending stress is generally not considered as critical. But in reality, there is a possibility of catastrophic failure of the bolt occurring in a concentric bolted joint as a result of the bending stress even before the joint looseness or before the bolt fracture under tension. The aim of this paper is to propose a closed form solution to predict the potential risk of this failure that could be developed particularly at moderate preload of the bolt. Three concentric bolted joint cases with M12, M10 and M8 with transverse load and external tension load were investigated; FEA and experimental results validated the closed form calculation.
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Nassar, Sayed A., and Vinayshankar L. Virupaksha. "Effect of Bolt Tightening and Joint Material on the Strength and Behavior of Composite Joints." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84040.

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This experimental study investigates the effect of the various combinations of bolt tightening and joint material on the strength and behavior of single lap, double bolted composite joints. The strength of the bolted joint is determined from a load-displacement test in which the joint members are pulled in the transverse direction relative to the bolts axis. Additionally, damage assessment is performed on the bearing surface between the shank of each bolt and the members of the joint. The bearing surface damage is examined using a Motic Microscope. Four tightening configurations are used in the testing of each joint. These configurations permit each bolt to be in either tight or loose conditions. The effect of joint material is also investigated, as well. Tested joints include composite-to-composite and composite-to-aluminum joint combination. The metric M8x1.25 bolts; Class 8.8 bolts are used in this study. Experimental results, data analysis, and conclusions are presented.
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Shojaei, Pouya, Mohamed Trabia, and Brendan O’Toole. "Effect of Bolted Joints on Shock Propagation Across Structures Under Medium Impact Loading." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11799.

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Abstract A bolted joint is one of the most common fastening techniques. While the behavior of bolted joints under static or quasi-static conditions is well documented, their behavior under shock/impact loading is not well-understood. In many applications, where a bolted joint connects a sensitive component to the rest of a structure, it is important to interpret shock propagation through the bolted joints. This problem is further complicated owing to the fact that a bolted joint exhibits multiple types of nonlinearities, due to the interaction between the bolts and clamped parts, thread friction between the shank and nut, pre-tension, damping characteristics, and interference with the hole. This study was focused on developing computational techniques for understanding shock propagation through a bolted joint. As a case study, the behavior of a bolted joint within a two-component cylindrical structure subjected to impact loading was considered. A finite element (FE) model of the fixture was developed. Two different approaches were considered. The first one modeled the bolt assembly as one part. The second model had the bolt and nut as separate parts. In this model, the tie contact between the bolt shank and the nut was defined using a shear failure criterion. Both models included bolt pre-tension. The two models were compared based on energy balance, acceleration signal, and displacement at the base of the fixture. The results indicated that the model with the separate bolt and nut resulted in a more realistic performance.
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Sawa, Shunichiro, Yuya Omiya, Mitsutoshi Ishimura, and Toshiyuki Sawa. "Mechanical Characteristics and Design of Bolted T-Shape Flange Joints Subjected to Tensile Loadings." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38086.

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Bolted joints have been widely used in mechanical structures. However, a design of bolted joints has been carried out empirically. In designing a bolted joint, it is necessary to know a ratio of increment Ft in axial bolt force to an external tensile loading W, that is, the load factor φ=Ft/W. In our previous paper, the new formulation for obtaining the value of the load factor φ for a bolted joint in which two hollow cylinders were clamped was proposed by introducing the tensile spring constant Kpt for clamped parts. Then, it is shown that the values of the load factor of bolted joint obtained from our formulation are in a fairly good agreement with the experimental values. In addition, the effect of the position where an external load is applied to the joint is significant on the value of the load factor. In the present paper, a method for obtaining the value of the load factor for bolted T-shape flange joints in which two T-shape flanges are clamped by two bolts and nuts under tensile loadings is demonstrated using two-dimensional theory of elasticity. In the analysis of the load factor φ, the compressive spring constant Kc for a hollow cylinder around the bolt hole is calculated. The value of the correction factor Kc′/Kpt is also analyzed using the two-dimensional theory of elasticity. When the external tensile loads are applied to the joints, the bolts are inclined and as the result, the bending moment occurs in the bolts. A method for analyzing the bending stress in the bolts is also demonstrated. In the numerical calculations, the distance C between the bolt position and the center of T-shape flange is varied and the effect of the distance C on the load factor is examined. For the validation of the analyses, calculations are also carried out. Experiments to measure the load factor and the maximum stress due to the bending moment occurred in the bolts were carried out. The numerical results of the load factor and the maximum stress in the bolts are fairly coincided with the experimental results. Furthermore, a design method for the joints is discussed, that is, how to determine the bolt position C, the bolt preload for the external tensile loading, how to choose the bolt strength.
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Goyder, Hugh, Philip Ind, and Daniel Brown. "Measurement of Damping due to Bolted Joints." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-12826.

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The damping of a structure assembled from subsystems (a built-up structure) is commonly assumed to be due to frictional effects in the joints. This paper attempts to investigate this hypothesis. A built-up beam with 10 bolted links and a plate with 27 bolts were tested. The procedure was to measure the damping and then remove a link or a bolt and then to repeat the measurement and remove a further link or bolt. This continued until all the links or bolts were removed. If the hypothesis is correct an analysis of the data was expected to show a correlation between the number of bolts and the damping. No such simple correlation was evident. One possibility is that the effect of joint damping is smaller than the effect of other sources of damping such as material damping. Other possibilities are also discussed.
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7

Goyder, Hugh, Philip Ind, and Daniel Brown. "Development of a Method for Measuring Damping in Bolted Joints." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47230.

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Bolted joints are a significant source of vibration damping but are extremely difficult to model within computer simulations. In order to make progress, good quality experiment data is needed to provide a basis for modelling and an understanding of the mechanisms involved. An apparatus for measuring damping in a lap joint has been developed in which bolted joints are exercised by swinging masses in a resonant configuration. The apparatus is set into vibration and then released so that the vibration decays with the bolt damping controlling the decay. After some signal processing the energy lost per cycle is extracted. The repeatability of the bolted joint behaviour is an issue of concern and this is examined by analysing a series of tests. Although largely successful the system probably applies too large a force to the joint which exhibits some slip which then contributes to the lack of repeatability observed.
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8

Amir, Yosef, S. Govindarajan, and Saravanakumar Iyyanar. "Bolted Joints Modeling Techniques, Analytical, Stochastic and FEA Comparison." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-85055.

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Bolted joints Design analyses are in general, very complex and it is very difficult to find a single technique to study the complete behavior of the bolted joints. The most popular analytical method is the well-known VDI 2230 which addresses most of the cases very well. This analytical method uses extreme values for critical parameter variations and is considered to be conservative, but the quickest method. Stochastic analysis is a more advanced method where variations in critical parameters are modeled as statistical distributions and Monte Carlo simulations allow predicting the behaviors of bolted joints through selective parameter variations. Finite element analysis of bolted joints is another methodology to analyze complex bolted joint designs. Though advances in FE modeling techniques help to model bolted joints more accurately, different failure modes require different modeling techniques. For practical complex bolted joints design analysis, a hybrid of analytical and different FEA models is needed for a full analysis; but a combination of FEA techniques can be used to study any bolted joint in detail for all the failure modes. Hence, it is important to study and understand the limitations of each of the modeling techniques. This paper looks at analytical and stochastic methods of bolted joints as well as three different FEA methods — 3D, Axisymmetric and Beam & Rigid Spider — to study different failure modes. Parametric (DOE) FEA simulation technique for variation parameters bolted joint behavior prediction was investigated; this paper examined the DOE parameter of coefficient of friction. A general case study is used as benchmark for comparison between the techniques and to quantify the advantages and disadvantages of each method.
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9

Goyder, Hugh, Philip Ind, and Daniel Brown. "Measurement of Damping in Bolted Joints." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70896.

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A structure may be built-up from subsystems that are attached to each other by bolted joints. If the structure is allowed to vibrate the bolted joints provide a significant contribution to the absorption of energy and are thus an important source of vibration damping. The details of such damping should be included in computer simulations but unfortunately too little is known about joints to make this possible. An experimental apparatus has been developed to investigate damping and is described in this paper together with two sets of experiments. The experimental apparatus consists of two masses and a spring which can be set into vibration and exercise the bolted joints. The decay of the vibration enables the rate of energy dissipation to be measured. The accuracy of the measurement process is examined in detail and a relationship between the noise in the measurements and the errors in the determination of damping formulated.
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10

Sinthusiri, Chaiwat, and Sayed A. Nassar. "Load Distributions in Bolted Single Lap Joints Under Non-Central Tensile Shear Loading." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24652.

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Abstract This study uses beam theory-based model to investigate a numerically calibrated bolt load distributions in a preloaded two-bolt single lap joint under non-central tensile shear loading. Linear spring-based modeling is used for the two preloaded bolts and substrates. In practice, due to geometric tolerance may not necessarily pass through the joint centerline causing an additional moment loading. Thus, the sharing load would not be equally distributed between all the bolt in the joint. The effect of various joint parameter, bolt preload and off-center location of the tensile shear loading is investigated and discussed. Proposed model would be useful in enhancing the reliability and safety of bolted joints.
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Reports on the topic "Bolted joints Joints (Engineering)"

1

Iarve, E. Spline Variational Theory for Composite Bolted Joints. Fort Belvoir, VA: Defense Technical Information Center, January 1997. http://dx.doi.org/10.21236/ada328258.

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Iarve, E., and R. Y. Kim. Spline Variational Theory for Composite Bolted Joints. Fort Belvoir, VA: Defense Technical Information Center, January 1998. http://dx.doi.org/10.21236/ada351476.

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Iarve, E. V., and R. Y. Kim. Spline Variational Theory for Composite Bolted Joints. Fort Belvoir, VA: Defense Technical Information Center, April 2000. http://dx.doi.org/10.21236/ada387153.

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Moss, Peter James. Multiple-bolted joints in wood members : a literature review. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 1997. http://dx.doi.org/10.2737/fpl-gtr-97.

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Bu, Yidu, Yuanqing Wang, Yipeng Zhao, Chunyi Xu, Tianxiong Zhang, and Qinglin Jiang. SEISMIC BEHAVIOUR OF STAINLESS STEEL BOLTED EXTENDED END PLATE JOINTS. The Hong Kong Institute of Steel Construction, December 2018. http://dx.doi.org/10.18057/icass2018.p.052.

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NUMERICAL STUDIES ON THE SEISMIC BEHAVIOUR OF A PREFABRICATED MULTI-STOREY MODULAR STEEL BUILDING WITH NEW-TYPE BOLTED JOINTS. The Hong Kong Institute of Steel Construction, March 2021. http://dx.doi.org/10.18057/ijasc.2021.17.1.1.

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STRESS RESPONSE AND INITIAL STIFFNESS OF SIDE PLATE CONNECTIONS TO WCFT COLUMNS. The Hong Kong Institute of Steel Construction, September 2021. http://dx.doi.org/10.18057/ijasc.2021.17.3.9.

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To study the mechanism of load transfer in double-side-plate connections between I-beams and wall-type concrete-filled steel tubular columns, a pseudo-static experiment and finite element analysis were conducted for two full-scaled specimens. The results revealed that the primary load was transmitted along an S-shaped path in the side plate, and the primary strain occurred in an X-shaped region between the left and right steel beam flanges. The shear force in the steel beam web was transmitted first to the side plate centre and then to the joint area, where the side plate, steel tube web, and concrete all resisted the internal force. Based on principal component methods, a calculation formula was established for initial rotational stiffness that comprehensively considers the influence of the tensions, compression, and shear deformation of the cover plate, side plate, and web. Comparing this formula with an existing model showed that the proposed formula is suitable for new types of side plate joints. Moreover, it can accurately calculate the initial rotational stiffness of the joint, thus providing a reliable basis for future engineering design.
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