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Relevant bibliographies by topics / Mechanical joining methods

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Academic literature on the topic 'Mechanical joining methods'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Mechanical joining methods"

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LeBacq, C., Y. Brechet, H. R. Shercliff, T. Jeggy, and L. Salvo. "Selection of joining methods in mechanical design." Materials & Design 23, no. 4 (June 2002): 405–16. http://dx.doi.org/10.1016/s0261-3069(01)00093-0.

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Sülü, İsmail Yasin, and Şemsettin Temiz. "Mechanical behavior of composite parts joined through different processes." Materials Testing 63, no. 5 (May 1, 2021): 411–19. http://dx.doi.org/10.1515/mt-2020-0070.

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Abstract In this research, composite parts joined according to different joining methods such as single-lap and double-lap embedded adhesive subjected to tensile load were analyzed via the 3-D finite element method (FEM). The study differed from other studies in terms of joining techniques used and the specified parameter and model design. This study aims to emphasize the advantages of joining techniques in terms of aesthetically and joining methods over each other. In the analysis, composite parts carbon/epoxy (T 700) at varied fiber orientation angles and adhesive DP 410 were used. The models for numerical analyses were created in an ANSYS 14.5 software package. Finite element analysis (FEA) was successful in predicting failure loads. Stress in the x, y, z directions, shear stress and von-Mises stress on the adhesive were obtained at the time of failure for predetermined parameters. As a result, the effects of orientation angles, overlap lengths, adhesive layer and bonding methods were investigated. The maximum effect parameter and joining technique was determined for the composite parts joined through varied joining methods.

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Liu, Ping, Kai Fu Zhang, and Wan Li Li. "Calculation Method for Interference Value in Metal Joining Structure." Advanced Materials Research 893 (February 2014): 668–71. http://dx.doi.org/10.4028/www.scientific.net/amr.893.668.

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Interference-fit joining is one of the important jointing methods to permanently fasten two thin-walled sheet metal parts. In joining process the interference amount is an important factor, which affects ultimate strength and fatigue life of the mechanical structure. In this article, analytical solution for interference value is studied, and the elastic and plastic deformation area near the hole is discussed. The calculation formula for the hole walls displacement and the boundary between elastic and plastic deformation is obtained.

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Meschut, Gerson, Marion Merkein, Alexander Brosius, and Mathias Bobbert. "Mechanical joining in versatile process chains." Production Engineering 16, no. 2-3 (April 2022): 187–91. http://dx.doi.org/10.1007/s11740-022-01125-y.

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AbstractThe use of mechanical joining technologies offers the possibility of joining mixed material structures, which are used in particular in lightweight construction. An integrated securing of the joinability in versatile process chains is currently hardly possible as the number of combinable tool variants as well as variable force- and path-based process parameters is infinite. A versatile process chain, i.e. a sequence of all the processes and process steps required for product manufacturing, enables targeted changes to the semi-finished product, the joint, the component or the joining process that exceed the originally planned extend while still ensuring joinability. In detail, it leads to a unique joint with its own mechanical property profile, which, against the background of the resulting infinite number of combinations, makes it impossible to secure the joinability on the conventional experimentally based approach without extensive safety factors. The Transregional Colaborative Research Center 285 (TCRC285), which also initiated this special issue, is intended to enable mechanical joining technology to be versatile in the sense of high application flexibility. This is to be achieved with a numerical representation of the complete process chain from the incoming semi finished product via the joining part production and the joining process to the property profile of the joint in the operating phase. Thus a predictability of the joinability can be achieved and improvements in the individual life cycles of a joint can be realized by grasping the cause-and-effect relationships. On the basis of this knowledge, new possibilities for intervention in the joining process are to be created for the adaptation of the joining processes. With the aid of the methods developed for this purpose, tools will later be available to the end user to substitute the large number of mechanical joining processes or joining task-specific configurations with a smaller number of adaptable processes. This expands the flexibility in material choices, enabling challenges in environmental issues and sustainability to be overcome.

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Holko, K. H. "JOINING METHODS FOR CARBON-CARBON COMPOSITE STRUCTURES." Advanced Materials and Manufacturing Processes 3, no. 2 (January 1988): 247–60. http://dx.doi.org/10.1080/10426918808953205.

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Cho, Keong Hwan, Jin Hyeok Joo, Jung Heum Lee, Je Hoon Oh, and Dong Hyuck Kam. "Comparative Study of Joint Performance According to Joining Methods Between Al7075-T6 and SPFC590DP for Lightweight Car Body." Journal of Welding and Joining 39, no. 5 (October 30, 2021): 497–504. http://dx.doi.org/10.5781/jwj.2021.39.5.5.

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The necessity of dissimilar joining between aluminum alloy and steel is increasing in order to meet the demand for weight reduction in automobiles. However, dissimilar joining between 7000 series aluminum alloy and steel is challenging with mechanical joining methods such as self-piercing rivet(SPR) and flow drill screw(FDS) without hole processing. In this study, mechanical performances of dissimilar joints between 3 mm thick Al7075-T6 and 1 mm thick SPFC590DP were evaluated for use in lightweight B-pillar assembly. Self-Piercing Rivet(SPR) and Flow Drill Screw(FDS) with one-hole processing, bolt/nut and blind rivet with two-hole processing and adhesive bonding were compared with respect to joint performance. In SPR joining, rivet did not penetrate and rivet buckling occurred in the rivet due to the thickness and high strength of the Al7075-T6. By processing pre-hole on Al7075-T6 and applying an additional Al5052-H32 sheet to induce mechanical interlock in SPR joint, it became possible to join Al7075-T6 to SPFC590DP with an SPR. The tensile shear load of the SPR joint was 9.8 kN. In FDS joining, it is also necessary to process pre-hole on Al7075-T6 since the fastener could not penetrate the Al7075-T6. The tensile shear load of the FDS joining was 8.1 kN. In bolt/nut and blind rivet joining, the tensile shear load were measured respectively 11.1 kN and 5.2 kN. In adhesive bonding with 1K glue, the tensile shear load was measured 18.5 kN when the interfacial surface was roughened with a sand paper.

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Hahn, Ortwin, Y. Tan, M. Schroeder, and Magnus Horstmann. "Thermally Supported Mechanical Joining of Magnesium Components." Materials Science Forum 488-489 (July 2005): 365–70. http://dx.doi.org/10.4028/www.scientific.net/msf.488-489.365.

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In modern car concepts the aspect of lightweight constructions becomes more and more important. Lightweight materials, as aluminum and magnesium, get in the spotlight, thereby. Particularly because of the enormous potential for lightweight constructions industrial interests in magnesium wrought- and casting materials have increased in recent years. Against this background new alternative methods in the range of joining techniques are necessary which consider the specific mechanical-technological properties, such as limited deformability at room temperature and high corrosion-affinity of magnesium. The present article discusses the integration of heating principles in a mechanical joining process of magnesium components without an additional pre-punch operation. In this connection, feasibilities and limits of the considered joining techniques are shown and a concept for thermal support is presented.

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Cmorej, Denis, and Ľuboš Kaščák. "Numerical Simulation of Mechanical Joining of Three DP600 and DC06 Steel Sheets." Advances in Mechanical and Materials Engineering 40 (2023): 23–29. http://dx.doi.org/10.7862/rm.2023.3.

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There are many reasons to utilize various grades of steel in car body production. Automotive producers tend to choose steels with great formability and the capacity to absorb impact energy. The dominant method used for joining car body sheets has for many years been resistance spot welding, but the use of various steel sheets leads to research into alternative joining methods. Mechanical joining - clinching, is the innovative method to join these materials. Numerical simulation tools are used to optimize the joining of materials. Simufact Forming software was used to analyse the clinching joining of three sheets of material DP600 and DC06. According to the axisymmetric character of the mechanical joining process, the simulation was stream-lined to a 2D representation. The results of the simulation of the mechanical joining process were compared with the real samples prepared for metallographic observation.

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SOYTURK, Furkan, Alper GUNOZ, and Memduh KARA. "Detection of Welding Defects by Non-Destructive Testing Methods." International Conference on Applied Engineering and Natural Sciences 1, no. 1 (July 20, 2023): 424–27. http://dx.doi.org/10.59287/icaens.1033.

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One of the most used joining methods in the manufacturing industry is welded joints. Welded joints are non-removable types of joints and good mechanical properties are expected from the weld seam after joining. For this reason, it is extremely important that there are no errors, defects or gaps in the weld area. This study is about the detection of defects existing in the welding regions of various machine elements with welded joints by non-destructive testing methods. The advantages and disadvantages of the non-destructive testing methods used in the study are presented.

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Agel, Petr, and Antonin Lokaj. "Load Bearing Capacity Tests of Mechanical Joining on Timber-Concrete Beam." Advanced Materials Research 1020 (October 2014): 177–81. http://dx.doi.org/10.4028/www.scientific.net/amr.1020.177.

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Timber-concrete composite structures, which use advantages of both materials, are suitable for new works and reconstructions of civil and residential buildings. There are described many methods of joining between timber beam and concrete slab in technical literature. Joints are more and more sophisticated which brings higher demands on work control and technology. Main goal of the paper is in design technologically low demanding method of joining with steel plates and nails, to test its shear strength and to compare it with other similar joining .

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Dissertations / Theses on the topic "Mechanical joining methods"

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Neupane, Manish. "Mechanical Joining Methods in Aluminum Sheets." University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1574853232358122.

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Shu, Lily Hwei-Li. "Application of a design-for-remanufacture framework to the selection of product life-cycle fastening and joining methods." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10917.

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Hahnlen, Ryan M. "Development and Characterization of NiTi Joining Methods and Metal Matrix Composite Transducers with Embedded NiTi by Ultrasonic Consolidation." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243886351.

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Hansen, Matthew Martin Kenneth. "Optimization of Conformal Joints in Axial Tension." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1355847865.

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McFall, Bruce Daniel. "An Adaptive Method of Joining Composite Structural Members." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1405435976.

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Höjer, Fredrik. "Putsa infärgat faner : Val av material, snittyta och metod." Thesis, Linköpings universitet, Malmstens Linköpings universitet, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-162975.

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I mitt examensarbete undersöker jag vilken putsmetod som lämpar sig bäst för putsning av infärgat faner utan att infärgat damm fastnar på oönskade områden. Testområdet har varit avgränsat till att undersöka detta problem tillsammans med andra, icke infärgade faner. Frågan är om det finns en metod som på ett effektivt och ergonomiskt sätt garanterar ett bra resultat? Mina tester utgår från om val av material, fiberriktning och snittyta har betydelse för hur det infärgade dammet fastnar på ytan. Min förhoppning är att hantverkare och formgivare ska ta hjälp av denna undersökning för att lättare kunna göra medvetna val där infärgade faner kombineras med andra träslag. Genom intervjuer med andra hantverkare, om deras erfarenheter har ett problemområde kartlagts utifrån vad som är mest relevant för undersökningen. Även litterära studier har gjorts för att bättre förstå träts anatomiska egenskaper. För att uppnå optimala förutsättningar för att infärgat damm inte ska fasta på oönskade områden visar testerna, genom att kombinera infärgat faner med ett bandporigt träslag som har en radiell snittyta tillsammans med en fiberriktning som ligger i samma riktning som putsriktningen, med en putsmetod där direkt sug över putsytan verkar samtidigt som putsningen ger bäst förutsättning för att infärgat damm inte fastnar på oönskade områden.

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Kumar, Santosh. "New Mechanical Methods to Join Sheets in Lap and Butt Configuration and Analytical Model to Predict and Improve Clinching Joint Strength." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/5487.

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Mechanical joining of sheets has many advantages over other joining methods in terms of wide variety combination of similar, dissimilar and non-metallic material sheet joining. In conventional SPR joining, the rivet and sheet materials are different, which causes problem in recyclability and corrosion. In study of new proposed method called Single Material SPR (SMSPR) joining, the aluminum sheets are joined using rivet made from the same material. In this method, since rivet needs to pierce through the first (top) sheet and flare in the second (bottom) sheet, rivet need to be higher strength than the sheets. To achieve required strength difference between sheet and rivet, the sheets are heated to a higher temperature and rivet is maintained at room temperature. The combination of temperature, ram speed, rivet and die profile are studied to obtain Single Material SPR (SMSPR) joint strength close to the conventional method. The mechanical joining methods including clinching and SPR are for lap joining, there is no technique for mechanical butt joining hence, a new method Self-Lock Butt Riveting (SLBR) is studied. The rivet and die dimensions play important role in achieving the strength close to the SPR joining method. For quick evaluation of clinching joint strength under cross tensile and lap shear loading conditions analytical method is necessary. Proposed analytical model is validated by conducting experiments on changing flange diameter, and is able to predict strength without greatly losing accuracy. Apart from quick evaluation the model offers greater understanding of joints behavior under various loading condition. Parameters (friction and wrap angle) identified in analytical model is used to increase lap shear strength without losing much of cross tensile strength by changing surface roughness

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Books on the topic "Mechanical joining methods"

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Erol, Sancaktar, Jahanian Shahriar, American Society of Mechanical Engineers. Design Engineering Division., and International Mechanical Engineering Congress and Exposition (1996 : Atlanta, Ga.), eds. Reliability, stress analysis, and failure prevention issues in fastening and joining, composite and smart structures, numerical and FEA methods, and risk minimization: Presented at the 1996 ASME International Mechanical Engineering Congress and Exposition, November 17-22, 1996, Atlanta, Georgia. New York, N.Y: American Society of Mechanical Engineers, 1996.

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Messler, Robert W. Integral mechanical attachment: A resurgence of the oldest method of joining. Burlington, MA: Butterworth-Heinemann/Elsevier, 2006.

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Messler, Robert W. Integral mechanical attachment: A resurgence of the oldest method of joining. Burlington, MA: Butterworth-Heinemann, 2006.

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4

Messler, Robert W. Integral Mechanical Attachment: A Resurgence of the Oldest Method of Joining. Elsevier Science & Technology Books, 2011.

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Coolen, Ton, Alessia Annibale, and Ekaterina Roberts. Generating Random Networks and Graphs. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198709893.001.0001.

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This book supports researchers who need to generate random networks, or who are interested in the theoretical study of random graphs. The coverage includes exponential random graphs (where the targeted probability of each network appearing in the ensemble is specified), growth algorithms (i.e. preferential attachment and the stub-joining configuration model), special constructions (e.g. geometric graphs and Watts Strogatz models) and graphs on structured spaces (e.g. multiplex networks). The presentation aims to be a complete starting point, including details of both theory and implementation, as well as discussions of the main strengths and weaknesses of each approach. It includes extensive references for readers wishing to go further. The material is carefully structured to be accessible to researchers from all disciplines while also containing rigorous mathematical analysis (largely based on the techniques of statistical mechanics) to support those wishing to further develop or implement the theory of random graph generation. This book is aimed at the graduate student or advanced undergraduate. It includes many worked examples, numerical simulations and exercises making it suitable for use in teaching. Explicit pseudocode algorithms are included to make the ideas easy to apply. Datasets are becoming increasingly large and network applications wider and more sophisticated. Testing hypotheses against properly specified control cases (null models) is at the heart of the ‘scientific method’. Knowledge on how to generate controlled and unbiased random graph ensembles is vital for anybody wishing to apply network science in their research.

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Book chapters on the topic "Mechanical joining methods"

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Jayendran, Ariacutty. "The joining of metals by mechanical methods." In Englisch für Maschinenbauer, 20–24. Wiesbaden: Vieweg+Teubner Verlag, 1994. http://dx.doi.org/10.1007/978-3-663-14137-2_4.

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Jayendran, Ariacutty. "The joining of metals by mechanical methods." In Englisch für Maschinenbauer, 22–26. Wiesbaden: Vieweg+Teubner Verlag, 2004. http://dx.doi.org/10.1007/978-3-663-09933-8_4.

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Jayendran, Ariacutty. "The joining of metals by mechanical methods." In Englisch für Maschinenbauer, 22–26. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-91912-0_4.

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Jayendran, Ariacutty. "The joining of metals by mechanical methods." In Englisch für Maschinenbauer, 22–26. Wiesbaden: Vieweg+Teubner Verlag, 2000. http://dx.doi.org/10.1007/978-3-322-92863-4_4.

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Jayendran, Ariacutty. "The joining of metals by mechanical methods." In Englisch für Maschinenbauer, 20–24. Wiesbaden: Vieweg+Teubner Verlag, 1997. http://dx.doi.org/10.1007/978-3-322-91976-2_4.

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Hamel, V., J. M. Roelandt, J. N. Gacel, and F. Schmit. "Clinch Joining Modeling with the Static Explicit Method and Remeshing." In Integrated Design and Manufacturing in Mechanical Engineering ’98, 275–82. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-015-9198-0_34.

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Köhler, Daniel, Robert Kupfer, Juliane Troschitz, and Maik Gude. "Clinching in In Situ CT—A Novel Validation Method for Mechanical Joining Processes." In The Minerals, Metals & Materials Series, 833–40. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-06212-4_75.

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Poomagal, S., and R. Sujatha. "An Innovative Method for Ranking Generalized Trapezoidal Fuzzy Number Using Euler Line of the Triangle Formed by Joining the Centroids-Application to Replacement Models." In Lecture Notes in Mechanical Engineering, 347–57. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-5049-2_26.

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Messler, Robert W. "Mechanical Fasteners and Joining Methods." In Joining of Advanced Materials, 63–106. Elsevier, 1993. http://dx.doi.org/10.1016/b978-0-7506-9008-9.50006-3.

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Messler, Robert W. "Mechanical Fasteners, Integral Attachments, and Other Mechanical Joining Methods." In Joining of Materials and Structures, 105–76. Elsevier, 2004. http://dx.doi.org/10.1016/b978-075067757-8/50003-8.

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Conference papers on the topic "Mechanical joining methods"

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Küçükoğlu, Ayça, and Fatih Karpat. "The Joining Techniques for Thermoplastics Materials in Automotive Industries: A Comprehensive Literature Review." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66185.

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Nowadays the use of thermoplastic materials has been increasing steadily, especially in automotive industries because of its positive effects on vehicle weight which is directly related to fuel consumption. These materials also provide a cost reduction for companies comparing with the steel or other similar materials. The other benefits of the thermoplastic materials are their high stiffness, excellent crashworthiness due to their energy-absorption characteristics, strength-to-weight ratios, fatigue and optimum design. Through their structure occurred by the polymer resins, thermoplastic materials can physically become a homogenized liquid when heated and hard when cooled. The thermoplastic materials are able to reheat, remolded and have good thermal and chemical stability. Also, these materials can be easily recycled which provides a lower environmental impact on the automotive industry. Due to the advantages of the thermoplastic materials, automotive industries have been using these technology in vehicle parts such as door panels, seat backs, load floor, engine cover, front end module, airbag housing, crash boxes, bumpers, instrument panel, air intake manifold, air duck, cross car beam, pedal brackets, gas tank carrier, etc. In order to produce the thermoplastic materials, a number of different methods (i.e. mechanical fastenings, ultrasonic assembly, metal inserts, snap fits, electromagnetic and heat welding, solvent/adhesive bonding) are proposed in the literature and most of them are successfully carried out in industrial applications. However, the identifying the joining technique according to the application area is an important issue to obtain appropriate material. Therefore, this paper presents a literature review of joining methods for thermoplastic materials and classifies the methods according to the structure of the joining technique. Within this context, more than 50 studies about joining techniques for thermoplastic materials are considered the methods are grouped into three main categories: chemical joining techniques, mechanical joining techniques, and thermal joining techniques. Chemical joining methods melt the surfaces of the materials by using a chemical solvent. By using the solvent, one plastic material is joined to itself or the material is joined to another type plastic that dissolves in the same solvent. In mechanical joining techniques, the materials are bonded by using some physical methods such as clipping, clamping, screwing, riveting, etc. Similarly, in thermal joining techniques the surface of the materials to be joined are heated and a pressure is applied until the thermoplastic material is formed. As a result of the review, the differences and efficiency of the joining methods are pointed out in the study with paired comparisons. Moreover, the real life applications of joining methods for thermoplastic materials in the automotive industry are presented. In this paper, effects of the joining techniques on pedestrian and occupant safety are also reviewed by taking into account the high-stress concentration factor, the inconvenient manufacturing process and, the reaction force peaks. Finally, the future challenges of the three categorized are summarized.

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May, Carl, Henry Wilson, J. Donn Hethcock, and Tim Davis. "Improved Structural Joint Concepts." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81422.

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The joining of composite materials used in airframe structures has always presented a challenge to the structural engineer. As part of a Survivable Affordable Repairable Airframe Program (SARAP) agreement, research on three advanced joining concepts was conducted to identify and validate designs that would provide improved structural efficiency when compared to conventional joining methods. The first involves using finger joints in thin laminates to produce a joint with high specific strength compared to typical joining methods. The second utilizes a derivative of needling for stabilized dry fabric pre-forms to improve through-the-thickness laminate and joint properties. The third concept focuses on compression preload to improve the performance of a typical lap joint. Within each concept, coupon or element tests were used to validate the performance of these alternative configurations. This paper presents both analytical predictions and test results documenting the effects of these improved joining methods.

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Zirngibl, Christoph, Christopher Sauer, Benjamin Schleich, and Sandro Wartzack. "Knowledge and Data-Based Design and Dimensioning of Mechanical Joining Connections." In ASME 2022 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/detc2022-89172.

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Abstract Challenges in the development of resource-efficient lightweight designs, such as emission and cost targets in production, lead to an increasing demand for environmentally friendly and fast joining processes. Therefore, cold-forming mechanical joining techniques provide an energy-efficient alternative in comparison to established processes, such as spot welding. However, to ensure a sufficient reliability of the product design, not only the selection of an appropriate manufacturing and joining method, but also the suitable dimensioning and validation of the entire joining process is a crucial step. In this context, thermal processes offer a large number of design principles while mechanical joining methods mainly require extensive experimental tests and the inclusion of expert knowledge. Although few contributions already investigated the data-based analysis of mechanical joints, a system for the requirement- and manufacturing-oriented dimensioning of joining components, such as different profiles and blanks, in combination with the estimation of joint properties is not available yet. Motivated by this lack, this contribution introduces an engineering workbench for the support of design engineers in the early development phases of the knowledge and data-based design of mechanical joining connections using clinching as an example. In this regard, the approach is demonstrated involving a similar material and sheet thickness combination with static loads.

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Wärmefjord, Kristina, Rikard Söderberg, and Lars Lindkvist. "Variation Simulation of Dissimilar Materials Using Clip Fasteners." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66551.

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The use, and the joining process, of dissimilar materials have recently been highlighted. Joining of dissimilar materials can however be problematic, due to different material properties. Different materials respond differently to temperature changes and this might lead to deformations and stress in the final assembly. The joining methods differ also often from the one used to join similar material. Variation simulation is used to predict the geometrical variation of a subassembly or a final product. In variation simulation of dissimilar materials it is important to include material properties in order to achieve an accurate result. Also the effects form joining method must be included in the simulation. To join dissimilar materials like plastic and sheet metal parts, clip fasteners are often used. This paper presents a method for variation simulation of dissimilar materials with a focus on how to model clip fasteners. The method allows effects of temperature changes on holding forces and geometrical variation in the final assembly to be evaluated. Holding force refers to the force a clip fastener must withstand after the parts are joined. The method proposed can be used to support the design and selection of clip fasteners.

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Grimm, Tyler J., Amit B. Deshpande, and Laine Mears. "Abrasive and Cutting Element Use in Friction Element Welding." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-68733.

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Abstract Increasing awareness of the global warming effects of greenhouse gas emissions has caused governments to impose strict regulations requiring significant improvements in vehicles’ fuel economy. These regulations have required automotive manufacturers to revise traditional designs. An effective method of improving fuel economy is through lightweighting, which can be achieved by incorporating multi-material designs. However, this method presents difficulty in manufacturing since traditional joining methods, such as resistance spot welding, cannot in many cases be directly used. Many advanced joining methods have recently been developed to enable multi-material joining. Friction element welding (FEW) is one such process which can join aluminum sheets to steel without any required pre-hole drilling. In this process, the fastener is rotated and driven into the aluminum sheet, producing frictional heat which causes the aluminum to flow around the fastener shaft. In a successful joint, this aluminum flow remains near the shaft of the element and is covered by the element’s head upon welding. However, when joining high-strength aluminum alloys, the flow is hindered and aluminum protrusions are formed which extend beyond the cover of the element’s head. These protrusions, termed chips, are known to increase corrosion and should be eliminated. A novel method of reducing this effect is explored which utilizes modified elements to increase friction between the element and the aluminum sheet, causing accelerated heating. Additionally, a modified tip design is tested which aims to cut through the aluminum sheet. These methods were found to reduce chipping; however, chipping could not be eliminated. It was concluded that this is not a viable method of addressing the chipping issue in FEW.

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Memon, Shabbir, and Chetan P. Nikhare. "Investigation of Tube Sheet Joining Through Hydroforging Process." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-94999.

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Abstract Tube-to-sheet joint expansion has been successfully used in HVAC industry for many years to avail better heat exchange between tube and fins (sheet). Because this system transports fluids under pressure, joining tube and sheet in heat exchangers is critical for all processing industries. The tube-sheet connection’s joining strength is critical because it directly affects plant safety. Tube-to-sheet joint strength is measured in terms of residual contact stress between the tube’s outer surface and the sheet’s hole surfaces. The joint integrity is affected by several design parameters, including the type of material and the initial radial clearance. The tube can be either deformed with or without an internal fluid pressure to create a joint. A commonly used process to deform the tube is hydroforming. However, hydroforming mostly uses the high pressure to deform the cross-section without dominantly use of axial length of the tube. In contrast, another category where the dominant use of axial length of the tube material is used to deform the section is termed as a hydroforging process. The use of a plastic deformation technique in hydroforging joining technology eliminates some of the limitations of existing joining technologies. The sheet deforms more strongly than the tube after the expansion tool is retracted. As a result, the tube and sheet come into direct contact. This method allows for the joining of dissimilar materials and is also environmentally friendly. Fastened joints, welded joints, and adhesive joints are all examples of methods of joining that are comparable to each other in terms of their advantages and disadvantages. In this paper a tube to sheet joint will be studied during the hydroforging process. While the tube is pressurized with low pressure, the axial force will be applied to buckle the tube outward and around sheet. In the second stage the buckling region was compressed to make a joint. Two setting will be studied: intermediate joint (named: mid joint) and end joint. For this work a two-dimensional (2D) axisymmetric finite element model will be developed. The axial compression to create a buckling/folding in the tube and later joining with the sheet were studied. The mechanics of the buckling/folding was analyzed during the axial compression. The stresses induced at the interface were studied and resulted.

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Landgrebe, Dirk, Roland Müller, Rico Haase, Peter Scholz, Matthias Riemer, Andre Albert, Raik Grützner, and Frank Schieck. "Efficient Manufacturing Methods for Hybrid Metal-Polymer Components." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65621.

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Lightweight design for automotive applications gains more and more importance for future products, independent from the powertrain concept. One of the key issues in lightweight design is to utilize the right material for the right application using the right value at the right place. This results irrevocably in a multi-material design. In order to increase the efficiency in manufacturing car components, the number of single parts in a component is decreased by increasing the complexity. Examples for the state of the art are tailored welded blanks in cold forming, tailored tempering in press hardening or metallic inlays in injection molding of polymers. The challenge for future production scenarios of multi-material components is to combine existing technologies for metal- and polymer-based applications in efficient hybrid process chains. This paper shows initial approaches of hybrid process chains for efficient manufacturing of hybrid metal-polymer components. These concepts are feasible for flat as well as for tubular applications. Beside the creation of the final geometric properties of the component by a forming process, integrated joining operations are increasingly required for the efficiency of the production process and the performance characteristics of the final component. Main target of this production philosophy is to create 100% ready-to-install components. This is shown in three examples for hybrid process combinations. The first example deals with the combination of metal forming and injection molding of polymers. Example number two is the application of hybrid metal-polymer blanks. Finally, example number three shows the advantages of process integrated forming and joining of single basic components.

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Simon, Jonathan, Long-Sun Huang, Balaji Sridharan, and Chang-Jin Kim. "Microgasketing and Room Temperature Wafer Joining for Liquid-Filled MEMS Devices." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0935.

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Abstract A closed liquid reservoir in typical fluidic microdevices contain liquid volumes ranging from μl to ml. A new approach for liquid filling and sealing of multiple microdevices with a volume less than 1 nl is presented. A Teflon microgasketing technique combined with a room temperature curing UV epoxy adhesive is used to isolate liquid inside each lithographically defined area and permanently seal the device all in a batch fashion. The technique has been applied to successfully package an array of liquid-filled mercury microrelays, each of extremely small volume (< nl). To ensure good penetration of the adhesive throughout the entire die of many microdevices, a method for adhesive distribution using wicking microchannels has been developed. The microgasketing technique is further combined with electroplated microriveting, another low-temperature wafer joining method, to provide sealing to the microriveting technique. Microgasketing is a quite general technique, as it can be combined with most low-temperature wafer joining methods and the reservoir area could contain liquid or gas and can be of a wide range of volumes and shapes.

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Moraes, J. F. C., and J. B. Jordon. "Numerical Analysis of Self-Pierce Riveting of Magnesium Alloys." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-66668.

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Regulations all over the world have been pushing vehicle manufacturers to increase fuel economies and decrease green house gas emissions. An effective way to meet these new regulations is to reduce automobile weight through the use of lightweight metals. Magnesium alloys have received recent interest due to its high strength-to-weight ratio. However, conventional fusion joining methods such as resistance spot welding are not effective for magnesium alloys. As such, an attractive joining technique for these lightweight metals is self-pierce riveting (SPR) which is fast, fumeless and does not melt the material. However, SPR must be performed at elevated temperatures because of the low ductility of magnesium alloys at room temperature. Even though the SPR joining process has been established on magnesium alloys, this joining process is not optimized. As such, this study establishes the first attempt at simulating the SPR of magnesium alloys through the use of the finite element method. An internal state variable (ISV) plasticity and damage material model was employed and comparison to experimental results show good results. The results of this study show that the ISV material model is ideally suited for modeling the SPR in magnesium alloys.

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Zheng, Hanchen, Frank Litwa, and Kristin Paetzold. "Improvement of Tolerance Simulation Model in Body in White Product Realization Loop by Integrating Manufacturing Joining Simulation." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-66534.

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Abstract Tolerance simulation has already been applied throughout the product realization loop in automotive industry to improve the product quality while reducing the product cost. However, the capability of tolerance simulation is limited by the prediction accuracy. Although tolerance simulation methods for non-rigid part are available which involve the elastic deformation during the manufacturing process, there are still difficulties while addressing large deformations and the Body In White (BIW) joining processes, which have non-linear effects. Thus, the Finite Element Method (FEM) based joining simulation raises its importance as it simulates the physical properties of parts in system and helps to digitize the manufacturing process. A proper combination of the manufacturing process simulation with the tolerance analysis contributes to the product and process optimization. In this paper, the current statistical tolerance simulation method is improved by integrating manufacturing joining simulations. The application of the joining-simulation based tolerance analysis is illustrated with an example of a sheet metal assembly in different product development phases. As a result, The critical tolerances are identified in the digital concept phase. The initial specified part tolerances are optimized regarding the assembly deviation requirements on the product characteristics and a given scrap rate. It contributes to reduce the production cost in the prototype phase, where the stamping machines are designed. Besides, the influence of tolerance change on the assembly dimensional quality in the late production phase is evaluated.

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Reports on the topic "Mechanical joining methods"

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Wink, Robert E. L51645 Screening of Connectors for J-Lay Operations. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), March 1991. http://dx.doi.org/10.55274/r0010108.

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This study identifies mechanical connectors which could be utilized in the J-Lay method of offshore pipeline construction. The J-Lay method offers advantages over the more conventional S-Lay method in deep water because the method imposes much lower stresses in the pipe during installation. It has the disadvantage that only one station is available for pipe joining, whereas in the S-Lay method 5-7 stations are available. The incentive for this project lies in finding a rapid joining method which overcomes the disadvantage of only one joining station. Screening tests were developed to identify mechanical connectors suitable for use in the J-Lay method of offshore pipeline construction. A scope of work for the developing the screening tests was prepared by Sweet and Aiken, Inc., and is included in this report as Appendix 4 (PR-203-910). The J-Lay method offers advantages over the S-Lay method in deep water because it imposes much lower stresses on the pipe during installation. Two connectors each from four different manufacturers were tested with 8 5/8 inch O.D. , 0.438 inch wall thickness, API 5LX-52 pipe. All connections passed combined load tests (internal pressure, tension, bending, and torsion) without any problems or leaks.

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