Bibliografie tematiche / Adhesive joints

Letteratura scientifica selezionata sul tema "Adhesive joints"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 30 luglio 2024

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Articoli di riviste sul tema "Adhesive joints"

1

Komorek, A., D. Grygiel, R. Bieńczak e J. Godzimirski. "The Possibility of a Visual Analysis of the Failure of Butt Adhesive Joints Made with Different Glues". Advances in Materials Science 18, n. 2 (1 giugno 2018): 59–68. http://dx.doi.org/10.1515/adms-2017-0032.

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AbstractThe results of conducted by the authors of the article numerical analyzes, indicate the importance of normal stresses, perpendicular to the adhesive joint, during the impact destruction of block adhesive samples. This kind of stresses are responsible for the occurrence of tearing or chipping in a joint. The very significant influence of adhesion in the impact-bonded adhesive joint was the reason for testing this parameter in joints made with adhesives with different Young’s modulus. It was assumed that adhesives differing in stiffness will have different adhesive properties, which should affect the impact strength of the adhesive joints. It was also assumed that the adhesion in the joint can be assessed by analyzing the surfaces of joint damage. Cylindrical butt joints connected with various adhesives were used to carry out the tests, in which they were loaded on tear-off. The nature of tested joints damage was usually cohesive or cohesive-adhesive. The assessment of the nature of joint damage allowed to determine whether they were the result of the loss of cohesion by the adhesive (cohesive damage) or the effect of poor adhesion between the hardened joint and adherends (adhesive damage). The assessment of the nature of the destruction was carried out by three methods: visual, using an optical microscope and using an electron microscope. As a result of the carried out observations, it was found that the visual method is the least useful and not very reliable, especially in the case of transparent or low-contrast in relation to the glued material joints. The use of electron microscope allows to obtain the most reliable results, however, the possible magnification is too large and the assessment of the entire weld fracture is difficult because it does not fit in the field of observation. Observations conducted using optical microscopy at a slight magnification (5-10 times), in most cases allow to determine the nature of the destruction to a satisfactory degree, with limitations such as in the visual method.
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2

Anasiewicz, Kamil, e Józef Kuczmaszewski. "Heterogeneity of Adhesive Joint Properties". Materials 16, n. 23 (24 novembre 2023): 7303. http://dx.doi.org/10.3390/ma16237303.

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This paper presents the results of a study of adhesive joints, focused on the heterogeneity of the properties of the adhesive material in the adhesive joint. The main objective of the study was to determine potential differences in the material properties of adhesive joints made with selected structural adhesives. Due to the impact of the joined material on the adhesive during the curing of the joint as well as the impact of phenomena occurring during the curing of the adhesive, the properties of the adhesive joint may vary along the thickness of the joint. Determining the differences in material properties over the thickness of the adhesive bond is important for more accurate prediction of adhesive bond strength in FEM simulations. In order to observe changes in the material properties of bonds, nanoindentation tests have been carried out on eight adhesive joint bonds made with common structural adhesives used to join sheets of aluminium alloy or corrosion-resistant steel. Basing on the achieved test results, load/unload curves were developed for imprints at characteristic spots of the joints. Distinct differences in the achieved average force value were observed for imprints located in the wall-adjacent zone and in the centre of the adhesive joint; this can be interpreted as areas of the joint with different material structures of higher or lower density of imperfections or porosities. Differences in the load/unload curves for ‘rigid’ and ‘flexible’ adhesives were analysed. The summary includes a conclusion that an adhesive joint is characterised by heterogeneous properties along its thickness.
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3

Rudawska, Anna, Izabela Miturska-Barańska e Elżbieta Doluk. "Influence of Surface Treatment on Steel Adhesive Joints Strength—Varnish Coats". Materials 14, n. 22 (16 novembre 2021): 6938. http://dx.doi.org/10.3390/ma14226938.

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The purpose of the paper is to determine the impact of surface treatment on the strength of adhesive joints, made from various steel sheets. Two variants of the surface treatment steel adherends were used: without the varnish coat and with the varnish coat, using three polymer-based varnishes (a simple, a hybrid, and a gel). Two types of the adhesives were used to prepare the adhesive joints: a single-component cyanoacrylate adhesive and a two-component epoxy adhesive. A strength test of the adhesive joints (EN DIN 1465 standard), a coating adhesion test (ASTM D3359-B standard), and surface topography, as well as surface roughness, parameters (PN-EN ISO 11562, PN-EN ISO 4287, and PN-EN ISO 25178 standards) were used. Based on the strength tests, it was observed that the adhesive joints, with the hybrid varnish onto the adherend’s surface, achieved markedly lower shear strength. The best results, in terms of the adhesive joint strength, made using the cyanoacrylate adhesive were achieved for the joints where the adherends were coated with a simple varnish, while in the joints made using the epoxy adhesive, the highest shear strength was achieved by the joints of sheets whose surfaces were coated with the gel varnish.
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Maćkowiak, Paweł, Dominika Płaczek e Agnieszka Sołtysiak. "Mechanical properties of Methacrylic Plexus MA300 adhesive material determined in tensile test and butt joints of aluminum thick plates". MATEC Web of Conferences 290 (2019): 01007. http://dx.doi.org/10.1051/matecconf/201929001007.

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Abstract (sommario):
Adhesive joints are an alternative method of joining elements. New adhesives achieve cohesion and adhesion strength comparable with plastics used for structural components and coatings. Bonding is faster, simpler and cheaper. For this reason, adhesive joints are increasingly replacing other types of connections. Tests show that the material properties in the cast adhesive specimens differ from the ones determined in the joint. Adhesive producers most often describe the strength of the overlap joint tested in accordance with ASTM D1002. Strength, modulus of elasticity and elongation to break tested in accordance with ASTM D638 are reported less frequently. The article presents a method for determining the mechanical properties of the adhesive in a butt joint and differences in the determined values in relation to the cast specimens on the example of methacrylic adhesive Plexus MA300. The tests were carried out for joining aluminium rod with a square cross-section of 15 mm x 15 mm and adhesive layer thickness of approximately 1 mm. The fractures of cast specimens and butt joints were analyzed.
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5

Lokhande, Rupesh, Abhijeet Deshpande e Ashok Mache. "Taguchi Analysis of Bonded Single-Lap Joint in Hemp Fiber Composite". International Journal of Engineering Technology and Sciences 3, n. 1 (30 giugno 2016): 27–33. http://dx.doi.org/10.15282/ijets.5.2016.1.4.1043.

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The adhesively bonded joints in composite structures are widely used in aerospace and automobile fields. Hemp epoxy composites are better alternative due to its lower specific gravity and higher toughness. . The joining process is inevitable in the application of such composites. The mechanical behaviour of such joints depends on the strength of the composite, adhesive strength and adhesion phenomenon between substrate and adhesive. The influence of overlap length, adhesive layer thickness and cure temperature on the performance of adhesive joints investigated experimentally. The influence of these parameters on the static behaviour of the joint was studied using design of experiment approach. L9 orthogonal array was used for experimental design. It was found that cure temperature of adhesive predominantly governs joint behaviour followed by adhesive layer thickness and overlap length. To obtain joint strength in the working limits, an empirical relationship between governing parameters and response was developed. Through the analysis it was observed that optimum strength of bonded joint was obtained with overlap length of 25 mm, adhesive layer thickness of 0.5 mm and cure temperature of 500C.
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6

Hardi, Witono, Agus Sigit Pramono e Yohanes. "Performance of Tri-Adhesive Joints to Improve the Shear Stress Distribution of Lap Joints". Key Engineering Materials 941 (17 marzo 2023): 295–300. http://dx.doi.org/10.4028/p-7u96du.

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The adhesive lap joints are extensively used in various engineering fields. Various methods were proposed to increase the strength of the lap joint. This paper presents the lap joint's characterization by applying three grades of adhesives in different material properties along the bond line. The stiffest adhesive is employed in the middle bond line, then gradually, those with a lower modulus of elasticity are placed at the ends of the lap joint. This technique reduces the stress concentration at the joining ends, so the stress distribution becomes smoother. Finite element analysis is used to model this problem in two dimensions. One of the adherent edges is applied to the fixed support, and the other end is subjected to tension. The analysis results show that the use of tri-adhesive changes the shear stress distribution along the bond line flatter and increases the strength of tri-adhesive lap joints compared to those single type adhesive applied individually.
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7

Papanicolaou, George C., Lykourgos C. Kontaxis, Nikolaos Kouris e Diana V. Portan. "Application of an Eco-Friendly Adhesive and Electrochemical Nanostructuring for Joining of Aluminum A1050 Plates". Materials 16, n. 6 (18 marzo 2023): 2428. http://dx.doi.org/10.3390/ma16062428.

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Abstract (sommario):
In adhesive joints used in several industrial applications, the adherends’ bonding is made using an adhesive, which is usually an epoxy resin. However, since these adhesives are derived from petroleum fractions, they are harmful to the environment, due to the pollutants produced both during their manufacture and subsequent use. Thus, in recent years, effective steps have been made to replace these adhesives with ecological (green) ones. The present work focuses on the study of aluminum A1050 joints bonded with a green adhesive; the study also involves the electrochemical anodization method applied to adherends for nano-functionalization. The nanostructured aluminum adherends allow the formation of an expanded surface area for adhesion, compared to the non-anodized adherends. For comparison reasons, two different adhesives (Araldite LY1564 and Green Super Sap) were used. In addition, for the same reasons, both anodized and non-anodized aluminum adherends were joined with both types of adhesives. The lap joints were subsequently tested under both shear-tension and three-point bending conditions. The major findings were that aluminum A1050 anodization in all cases resulted in shear strength enhancement of the joints, while joints with both aluminum anodized and non-anodized adherends and bonded with the eco-friendly adhesive showed a superior shear behavior as compared to the respective joints bonded with Araldite adhesive.
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8

Md Sayed Anwar, Md Ahatashamul Haque Khan Shuvo, Md Manirul Islam, Md Mehedi Hasan Ziad e Md Ariful Hasan. "Effect of Adhesive Type on the Adhesively Bonded Stepped Joint: A Numerical Investigation". Malaysian Journal on Composites Science and Manufacturing 13, n. 1 (27 marzo 2024): 82–97. http://dx.doi.org/10.37934/mjcsm.13.1.8297.

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Abstract (sommario):
Single-lap joints are by far the most widely used adhesive joints and have been the subject of considerable research over the years. It is used in the automobile and aerospace industry where bolted or riveted joints are impossible. The joint strength in adhesively bonded joints depends on the adhesive and adherend properties and adherend geometry. In this paper, both the adhesive property and adherend geometry are considered. Two types of adhesives, i.e., SBT9244 (flexible) and DP460 (stiff), and three types of adherend geometry, Single Lap Joint (SLJ), One Step Lap Joint (OSLJ), and Three Step Lap Joint (TSLJ) are considered, and the effect of these are investigated by using a commercially available software Abaqus. The maximum peel stress occurs in a lap joint towards the edges of the joint and is minimum around the center region. The maximum peel stress is responsible for the failure of the joints, and the objective of this research was to reduce the peel stress, i.e., provide a more uniform stress distribution. Soft adhesive maximum peel stress and shear stress occur in [Type-I] 8.6 MPa and 6.4 MPa, respectively. Similarly, stiff adhesive maximum peel stress and shear stress occur in [Type-I] 37.14 MPa and 20.44 MPa, respectively. It is found from this investigation that if a relatively soft adhesive (SBT9244) is used in the joint, then the stress distribution reduces compared to a stiff adhesive (DP460). On the other hand, if steps are introduced in the bonded region, the stress distribution becomes more uniform and increases the bond strength.
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Barca, Iga, Marek Rośkowicz e Jan Godzimirski. "Selection of materials for repairing punctures of metal skin of semi-monocoque structures using composite patches". Technologia i Automatyzacja Montażu 120, n. 2 (2023): 19–32. http://dx.doi.org/10.7862/tiam.2023.2.3.

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For repairing punctures of skin of semi-monocoque structures under field conditions, simple methods are sought to guarantee the reliability of the repaired structure. Therefore, adhesive joints and composite materials are being increasingly used in repairs. During repairs using adhesion, an important aspect that affects the quality of the joint is the selection of the adhesive and the quality of surface preparation of the parts to be joined. This is necessary to get the right bond strength and durability of the joint in working environments characterized by extreme temperatures and exposure to chemicals and moisture. The purpose of the study was to select an adhesive with good strength properties for bonding AW2024T3 aluminum sheets to carbon and glass composites, and to analyze the effect of metal surface preparation on the strength of adhesive joints (grinding, sandblasting and chemical surface preparation). The tests were carried out on overlap (metal-composite) specimens. For selected adhesives, strength tests were also carried out on specimens replicating the repaired damage with a diameter of 20 mm of metal skin repaired by different methods, including composite patches and adhesive joints. The specimens were loaded in tension and loss of stability. The tests made it possible to determine the requirements for composite patches used for repairing upper and lower airframe wing skins.
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Golewski, Przemysław. "Tensile Behaviour of Double- and Triple-Adhesive Single Lap Joints Made with Spot Epoxy and Double-Sided Adhesive Tape". Materials 15, n. 21 (7 novembre 2022): 7855. http://dx.doi.org/10.3390/ma15217855.

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Dual adhesives are mainly used to increase the strength of single lap joints (SLJs) by reducing the stress concentration at its ends. However, they can also be used to design the characteristics of the joint so that its operation and failure occur in several stages. This paper presents the results of uniaxial tensile tests for dual-adhesive and triple-adhesive SLJs. The adherends were made of aluminum and glass fiber-reinforced polymer (GFRP) composite. For dual-adhesive SLJs, 10 epoxies and 1.6 mm thick double-sided adhesive tape were used. The stiffest (Epidian 53 (100 g) + “PAC” hardener (80 g)) and most elastic (Scotch-Weld 2216 B/A Translucent) joints were determined, which were then used in a triple-adhesive joint with the same double-sided adhesive tape. Circular holes of different diameters from 8 mm to 20 mm were made in the double-sided adhesive tape, which were filled with liquid epoxy adhesive by injection after the adherends were joined. By using the double-sided adhesive tape, the geometry of the epoxy joints was perfect, free of spews, and had a constant thickness. The effect of the spot epoxy joint diameters and the arrangement of stiff and elastic joints in the SLJs were analyzed using digital image correlation (DIC).
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Tesi sul tema "Adhesive joints"

1

Kon, Haruhiko. "Characterization of adhesively bonded joints using bulk adhesive properties". Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-01242009-063346/.

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Su, Ning. "Durability and fatique performance of structural adhesives and adhesive joints". Thesis, University of Dundee, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240601.

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Kawashita, Luiz Fernando. "The peeling of adhesive joints". Thesis, Imperial College London, 2006. http://hdl.handle.net/10044/1/7720.

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Korenberg, Capucine Florence. "The durability of adhesive joints". Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272387.

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Hutchinson, Allan Robert. "Durability of structural adhesive joints". Thesis, University of Dundee, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245438.

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Feih, Stefanie. "Design of composite adhesive joints". Thesis, University of Cambridge, 2002. https://www.repository.cam.ac.uk/handle/1810/284008.

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Bland, David Jonathan. "The durability of adhesive joints". Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/5687.

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One of the most important requirements of an adhesive joint is the ability to retain a significant proportion of its load-bearing capability for the long periods under the wide variety of environmental conditions encountered during its service-life. There exists a need to improve the understanding of the mechanics and mechanisms associated with the durability of adhesive joints in hostile environments, such as one of the most potentially damaging and frequently encountered, water, to further their future extensive use in engineering applications. In the present research, four important aspects in relation to the durability of adhesive joints have been investigated. These were: (a) developing sound short-term accelerated test methodologies to assess the durability of adhesive joints; (b) understanding the mechanisms of environmental attack on different types of surface pretreated adhesively bonded aluminium alloy substrates; (c) developing adhesive/primer/pretreatment systems which possess excellent long-term durability; and (d) investigating the potential of environmentally-friendly organosilanes as primers to enhance the intrinsic adhesion of adhesive joints. The results from these studies showed that: (a) constant displacement rate and cyclicfatigue tests provide excellent quantitative durability test methodologies; (b) fracture mechanics and advanced surface analysis of adhesive joints have proven surface pretreatments using phosphoric acid anodising (PAA) are far superior to those employing a grit blasting and degreasing (GBD) pretreatment which can be attributed to the increased surface area and excellent bonding morphology of the anodised oxide surface, allowing deep penetration of the viscous adhesive and impeding water ingress at the adhesive/substrate interface; (c) the durability performance of PAA pretreated adhesive joints employing a primer (PAAP) are superior to those without a primer specifically in water, and acid-based surface pretreatments are significantly advanced compared to simple GBD; and (d) the self assembling long carbon-chain silanes enhance the durability of adhesive joints via the formation of covalent bonds between the adhesive and the activated silane monolayer deposited on the substrate.
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Little, Matthew S. G. "The durability of structural adhesive joints". Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417769.

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Sanchez, Francisco Sebastian Rodriguez. "Fracture Behaviour of Automotive Adhesive Joints". Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485405.

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Adhesives can enable significant weight reductions in automotive constructions. However, the performance of adhesive joints and the energy absorption of bonded structures needs to be well understood. This thesis describes the perfonnance of a number of automotive adhesive joints using a fracture mechanics approach. The fracture energy, Gc ' was used to characterise the joint perfonnance during different modes of loading at low and high r,ates. A detailed analysis strategy was developed to account for the different types of crack propagatidn observed and the high rate effects encountered. This analysis also included the use of load-independent equations and incorporated the effects of kinetic energy. A high-speed video system was used to study the fracture behaviour and to measure accurately the deformation ofthe joint and the crack growth. During mode I tests the values of Gc decreased as the test rate was increased. The increase in test rate did not induce significant variations in the initiation values of Gc in mode II and mixed-mode VII when load independent methods were used. Delamination of the composite substrates in some tests complicated the interpretation of the results and made some mixed-mode failure criteria difficult to apply. However, an analytical model was introduced to predict the composite delamination observed in the different tests and this showed an excellent agreement with the observed failure paths. The results obtained for mode I demonstrated that neither test velocity nor crack speed was the parameter controlling the toughness. Instead the time parameter rl/2 appeared to describe the variation in G/c more closely. This parameter relates to the adiabatic heating at the crack tip, which causes a material softening. Thermographic measurements were performed to support this proposal. Finally, structural tests on composite crush tubes showed that adhesively bonded structures can indeed be used with confidence in automotive applications.
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Bigwood, David Andrew. "The design of structural adhesive joints". Thesis, University of Surrey, 1990. http://epubs.surrey.ac.uk/770397/.

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This thesis details the work carried out under two research projects at the University of Surrey. The first project titled The Design of Structural Adhesive Joints', was of three years duration from September 1985 to August 1988 and was sponsored by the Science and Engineering Research Council. The second project, sponsored by Ford UK Ltd, and tided 'A General Joint Analysis Facility extended certain aspects of the analysis work initiated In the first period of research. The objective of the work was to address the problem of integrating structural adhesives Into the design process and to provide procedures that would facilitate this integration in a quantitative, rather than the more usual qualitative way. To be effective, such an approach needed to consider not only a means of analyzing a proposed joint but also a way of predicting the actual failure of that joint. An extensive literature survey of analyses available to the design engineer has been completed. The analyses investigated were found to be lacking in several critical respects, and as part of this research, methods of analysis overcoming some of these limitations have been developed. The analyses produced are based on earlier approaches but extended and modified as appropriate. The work on all the analyses produced has been carried out by considering a simple adherend-adhesive sandwich configuration. Five different analyses, considering the sandwich to be modelled with differing degrees of complexity, have been produced. In all of the analyses the adherends are assumed to behave as cylindrically bent plates capable of sustaining both tensile and shear forces and bending moments, with the adhesive transmitting both tensile and/or shear loads. Initially an elastic solution was obtained, adopting a relatively simple approach. This enabled the subsequent enhancement of including non-linear material behaviour to utilize the same governing equations, thus maintaining consistentcy. The General Elastic Analysis (GEA) has been extensively simplified to produce a number of two parameter design formulae suitable for use by an engineer at an early stage in the design process. The two analyses produced by this simplification are called the Simplified Peel Analysis (SPA) and the Simplified Shear Analysis (SSA), so called because they consider the named component of stress in the adhesive layer only. The GEA was then extended to include non-linear material properties in the adhesive layer, and an analysis called the Non-linear Adhesive Analysis (NLAA) was produced. A programme of validation using the NLAA and a non-linear finite element analysis of similar joint configurations was carried out. Additional comparisons with existing analyses have also been undertaken where possible. The NLAA has been shown to produce extremely accurate results for the stresses in the adhesive layer when compared with the component stresses predicted by the finite element method (FEM). The NLAA has been used successfully to determine the spread of yield in a single-lap joint, giving dose agreement with results from analysis using the FEM, but with much reduced computer and operator time. The final stage of the work was concerned with the Inclusion of non-linear adherend material properties, and an analysis called the Full Non-linear Analysis (FNLA) has been produced which Incorporates this refinement to the general model. Again the finite element method has been used to assess the accuracy of this new analysis, and the results from this work are presented here. Derivations of both forms of the elastic analysis and of the non-linear and full non-linear analyses are reported in Chapters 4 and 5 and the software appropriate to each Is described fully. The Initial survey of available literature has shown that there Is considerable lack of knowledge about possible causes of joint failure. Specifically, It Is noted that a criterion by which joint failure can be measured has not been uniquely defined. In an attempt to provide a criterion or criteria to enable the prediction of joint failure a 'Failure Criteria' test and analysis programme has been completed. Joint configurations were manufactured using a range of adhesives with different levels of ductility, and adherends of different stiffnesses. Batches of these test coupons were tested to failure under both predominantly mode I and mode 11ty pes of loading. Both FEM and FNLA analyses of each test configuration have been carried out, and the stress and strain distributions at the levels of failure load were established for each batch and studied to establish any correlation between various proposed failure criteria. Close agreement between certain factors and the equivalent bulk material properties was noted for test batches. The applicability of various failure criteria for both the mode I and mode II test configurations and possible general criteria are discussed. The failure of the mode I test configurations has been shown to be governed by the local level of maximum principal stress at the end of the overlap. The mode II test configurations also show dose agreement in terms of the maximum principal stress, but agreement with bulk data Is poor. Therefore, a further failure criterion is proposed for the mode II joints in terms of the 'global yielding' of the adhesive layer. The bulk property testing of the adherend and adhesive materials to establish their physical properties for use in the finite element analysis of the test programme Is also fully documented.
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Libri sul tema "Adhesive joints"

1

Possart, Wulff, e Markus Brede, a cura di. Adhesive Joints. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527803743.

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da Silva, Lucas F. M., Alessandro Pirondi e Andreas Öchsner, a cura di. Hybrid Adhesive Joints. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16623-5.

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3

da Silva, Lucas F. M., David A. Dillard, Bamber Blackman e Robert D. Adams, a cura di. Testing Adhesive Joints. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527647026.

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4

Adams, Robert D. Structural adhesive joints in engineering. 2a ed. London: Chapman & Hall, 1997.

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5

S, Zenkin A., Tovarystvo "Znanni͡a︡" Ukraïny e Ukraïnsʹkyĭ budynok ekonomichnykh ta naukovo-tekhnichnykhn znanʹ., a cura di. Primenenie kleevykh kompozit͡s︡iĭ v narodnom khozi͡a︡ĭstve Ukrainy: Tezisy dokladov konferent͡s︡ii, 24-26 mai͡a︡ 1994 goda, g. Evpatorii͡a︡. Kiev: Ob-vo "Znanie" Ukrainy, 1994.

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6

Freĭdin, Anatoliĭ Semenovich. Svoĭstva i raschet adgezionnykh soedineniĭ. Moskva: "Khimii͡a︡", 1990.

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7

1935-, Wightman James P., e Langley Research Center. Materials Division., a cura di. Fracture surface analysis in composite and titanium bonding: Final technical report. Blacksburg, VA: Chemistry Dept., Virginia Polytechnic Institute & State University, 1985.

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8

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

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9

Plausinis, Derek. Time-dependent fracture of adhesive joints. Ottawa: National Library of Canada, 1994.

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10

Mittal, Kash L. Adhesive Joints: Formation, Characteristics and Testing. London: CRC Press, 2023. http://dx.doi.org/10.1201/9780429070709.

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Capitoli di libri sul tema "Adhesive joints"

1

Possart, Wulff. "Adhesion and Interphases: The Basic Ideas in Brief". In Adhesive Joints, 1–42. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527803743.ch1_01.

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Possart, Gunnar, e Paul Steinmann. "Adhesive Network Formation: Continuum Mechanical Modelling and Simulation". In Adhesive Joints, 43–77. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527803743.ch1_02.

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Possart, Gunnar, e Paul Steinmann. "Mechanical Interphases in Adhesive Joints: Characterisation Methods and FE-Simulations". In Adhesive Joints, 79–133. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527803743.ch1_03.

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Brede, Markus. "Fracture Mechanics of Adhesive Joints". In Adhesive Joints, 135–66. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527803743.ch1_04.

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Herzig, Alexander, Michael Johlitz e Alexander Lion. "Ageing Phenomena in Polymers: A Short Survey". In Adhesive Joints, 167–204. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527803743.ch2_01.

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Diebels, Stefan, Florian Goldschmidt e Frederik Scherff. "Continuum Modelling of Ageing Adhesive Joints". In Adhesive Joints, 205–28. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527803743.ch2_02.

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Hesebeck, Olaf, Udo Meyer, Andrea Sondag e Markus Brede. "Crack Growth in Adhesive Joints: Balance of Energy for Mode I Crack Propagation". In Adhesive Joints, 229–64. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527803743.ch2_03.

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Depollier, Léo, Jesus Ernesto Huacuja-Sánchez e Wulff Possart. "Joints with a Basic Epoxy Adhesive: Ageing Processes". In Adhesive Joints, 265–307. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527803743.ch2_04.

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Huacuja-Sánchez, Jesus E., Philipp Engel e Wulff Possart. "Steel Joints with a Basic Polyurethane Adhesive - Ageing Processes". In Adhesive Joints, 309–53. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527803743.ch2_05.

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Goldschmidt, Florian, Stefan Diebels, Frederik Scherff, Léo Depollier, Jesus Ernesto Huacuja-Sanchez e Wulff Possart. "Viscoelasticity in Ageing Joints - Experiments and Simulation". In Adhesive Joints, 355–74. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527803743.ch2_06.

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Atti di convegni sul tema "Adhesive joints"

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Teli, Samar, e Erol Sancaktar. "Stress States and Interference in Double Adhesive Layer Scarf and Butt Joints". In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33416.

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The stress interference effects adhesively bonded scarf and butt joints were investigated when an additional adhesive layer was incorporated in overall joint design. Finite element models were developed and analyzed to compare interfacial stress states and peak stresses on the double adhesive layer joints with those on the single adhesive layer joints with respect to the scarf angle, adhesive layer separation (ALS) and adhesive modulus. This comparison was done in terms of stress ratio calculated as a ratio of interfacial peak stress on double adhesive layer joint to that an single adhesive layer joint. The tensile task results were correlated with the finite element analysis (FEA) results in terms of load ratio calculated as a ratio of failure load on single adhesive layer joint to that on double adhesive layer joint. Six scarf angles (15°, 30°, 45°, 60°, 75° and 90°), three ALS and adhesives were analyzed for this study.
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Liu, Jiemin, Songjian He e Toshiyuki Sawa. "Strength and Finite Element Analysis of Single-Lap Joints With Adhesively Filled Columns". In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33418.

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This paper introduces a novel approach to increasing the loading ability of adhesive joints by adding adhesively filled columns. Following procedures are taken for making adhesive joints with adhesively filled columns: At first, holes are drilled at the overlap region of adherends, and then these holes are filled with adhesive or reinforced columns (such as reinforced fiber composite, metal columns, etc.). At the same time, adhesive is also applied on the surfaces of the overlap of adherends. After cured, the reinforced columns and adhesive in the holes form so-called adhesively filled columns. In this study, strengths of single-lap adhesive joints with adhesively filled columns were measured experimentally. Stress and strain distributions at typical positions in adhesive layer were analyzed by using Finite Element Method (FEM). Failure mechanics of the joint were analyzed. It was found that to well-bonded joints, the metal columns make the joint strength increase obviously and the joint strength increases with increasing of adherend thickness. Therefore, using reinforced columns in adhesive joints is an effective approach to generalizing adhesive joints from thin-walled joints to loading sizable bulk ones.
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Liu, Jiemin, e Toshiyuki Sawa. "Failure Properties of Adhesive Joints With Adhesively Filled Columns". In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42224.

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Failure properties of bulk adhesive joints with Adhesively Filled Columns (AFCs) subjected to external loads were investigated by experimental method and finite element method (FEM). From the experiment results, it was found that the strengths of the bulk adhesive joints with AFCs increases considerably whether they are subjected to external tensile loads or lateral bending loads. And the joint strenghts increase with increasing of the depths of the blind holes. Failure process of the joints with AFCs was simulated by element birth-death technology developed in FEM. The conclusions obtained from FEM coincide with that obtained from the experiments.
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Sancaktar, Erol. "Fatigue Behavior of Adhesive Joints Under Biaxial Loading Conditions". In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0067.

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Abstract Fatigue data obtained under biaxial loading conditions for adhesively bonded joints are used to plot S-N type diagrams to assess the effects of biaxiality in loading. Independently Loaded Mixed-Mode Specimens (ILM MS) are used for data collection purposes. These specimens are basically two (steel) beams bonded to be fatigue loaded under cantilever (opening) mode while a simultaneous but physically separate in-plane (static) shear load is also induced with the aid of a small hydraulic piston embedded in the specimen. Application of such static shear loads results in different S-N behavior for the bonded joint. The model adhesives used are Metlbond 1113-2 and Metlbond 1113 solid film thermosetting adhesives similar to those commonly used in aircraft and aerospace industries. The former is an elastomer-modified epoxy adhesive and the latter is identical except that it containes a synthetic earner cloth. Thus, the effects of carrier cloth in adhesive’s S-N behavior is also assessed. Analytically, the classical linear log-log representation of the adhesive S-N data is explored and modifications necessary to reflect the effects of biaxiality in loading and also the presence of a carrier cloth are assessed. The fatigue failure results are also compared with results obtained under monotonic biaxial loading conditions.
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Yan, Cuifen, Xin Wu e Sayed Nassar. "Characterization of Adhesive-Bonded Sheet Metal Joints". In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63498.

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The bonding strength of metal-metal single-lap joints with different adhesives applied on steels and aluminum alloys were studied. The bonding strength is found to be related to the type of adhesives and the backing metal, the surface roughness, the surface scratch orientations, the adhesive layer thickness, and the loading conditions (static vs. cyclic and loading rate). SEM observation of fractured surfaces reveals some common feature of bonding strength enhancement, fracture paths and the mechanisms of fracture. The direction of the adhesive joint design is suggested.
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Dvorak, George J., Jian Zhang e Olcay Canyurt. "Adhesive Joints for Composite Sandwich Structures". In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-2034.

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Abstract A new approach is explored for joining of thick, woven E-glass/vinyl ester composite laminated plates to steel or composite plates, with applications in naval ship structures. Adhesive is applied along through-the-thickness contoured interfaces, employing tongue-and-groove geometry. Both experimental and finite element modeling results are presented. They show that adhesively bonded tongue-and-groove joints between steel and composite plates loaded in monotonically increasing longitudinal tension, are stronger than conventional strap joints even in relatively thin plates. In particular, a single 0.25 in. wide and 8 or 12 in. long steel tongue, bonded by the Dexter- Hysol 9339 adhesive to a groove in a 0.5 in. thick laminated plate, can support a 20,000 lbs tension force. This force is expected to increase in proportion to plate thickness. Simple design rules indicate that high joint efficiency can be achieved for any thickness of the joined plates.
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KHAMMASSI10.12783/asc36/35835, SABRINE, e MOSTAPHA TARFAOUI. "ENHANCED FRACTURE TOUGHNESS OF ADHESIVE JOINTS WITH DOPING EPOXY BY GRAPHENE NANOPLATELETS". In Thirty-sixth Technical Conference. Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/asc36/35835.

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It is necessary to enhance the mechanical properties of adhesives to replace conventional joint methods with adhesive bonding. Epoxy in its pure state often suffers catastrophic damage due to its obvious brittleness and low fracture toughness. In this study, the double cantilever beam (DCB - Mode I) was used to characterize the fracture toughness of graphene/DGEBA-epoxy nanocomposite adhesive in bonded aluminium alloy joints and bonded composite joints. Adhesives based on an epoxy adhesive DGEBA (Bisphenol A diglycidyl ether) reinforced with two percentages (1wt.% and 2wt.%) of graphene nanoplatelets (GNP) were prepared. In this study, one shows that the fracture toughness of adhesive nanocomposites was significantly better than neat epoxy-bonded adhesives. Both types of joints contain graphene resulting in increased fracture toughness. Therefore, the maximum fracture toughness was observed until the GNP reached 1wt.%, and then it began to decrease, but it is still higher than that of the pure adhesive joint. On the other hand, this work aims to determine the influence of interfacial interactions on the behavior of enhanced bonded joints and how graphene nanoplatelets can enhance the rigidity of the interface between the substrate and the adhesive. In addition, a numerical study using ABAQUS was performed and compared with the experiments performed on DCB. For the modeling of the damage in an assembly joint, the Cohesive Zone Model (CZM) was used for the fracture behavior of the adhesive.
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Liu, Jiemin, e Toshiyuki Sawa. "Stress Analysis and Strength Evaluation of Single-Lap Adhesive Joints Combining Rivets Subjected to External Bending Moments". In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-1186.

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Abstract Stress analysis and strength evaluation of single-lap adhesive joints combining rivets subjected to external bending moments are conducted by three-dimensional finite element analysis (FEA). In this analysis, the effects of the ratio of Young’s moduli of the rivets to that of the adherends, the initial tightening force produced in the rivets, the adhesive layers between the rivet heads and the adherends, and the positions of the rivets on the stress distributions at the interfaces between the adherends and the adhesives are examined. The rupture process of the single-lap adhesive joint combining rivets is demonstrated. The strength of single-lap adhesive joints combining rivets is evaluated by the maximum principal strain criterion using the maximum principal strain at the adhesive interfaces. The FEA results show that the failure of single-lap adhesive joints and single-lap adhesive joints combining rivets with thinner adherends are due to large elasto-plastic deformation of the adherends. For single-lap adhesive joints of thick adherends, the rupture is initiated from the edge of the adhesive interface. Experiments to measure the strength of single-lap adhesive joints, single-lap riveted joint and single-lap adhesive joints combining rivets were carried out. The failure types of single-lap adhesive joints and single-lap adhesive joints combining rivets obtained from the experiments coincide with the FEA results. The experimental results also show that the failure of single-lap riveted joints with thinner adherends is due to large plastic deformation of the adherends. However, for single-lap riveted joints with thick adherends it is shown that their failure is caused by the rupture of the rivets. Finally, it is found that fitted rivets in single-lap adhesive joints of thick adherends can enhance the joint strength.
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Karlovits, Igor, Gregor Lavrič e Urška Kavčič. "Bacterial nanocellulose enhanced cardboard adhesion joint tested with Y-peel and T-peel testing methods". In 11th International Symposium on Graphic Engineering and Design. University of Novi Sad, Faculty of technical sciences, Department of graphic engineering and design, 2022. http://dx.doi.org/10.24867/grid-2022-p17.

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The demands on the adhesive joints for packaging are important during conversion, transport, storage, shelf exposure, and end-of-life operations of paper-based packaging. During this lifecycle, the adhesive joint is under constant loading from environmental conditions (e.g. forces from the surroundings such as other packaging units, dynamical forces from the machines, and/or climate changes such as temperature and relative humidity). The contribution from mechanical bonding can be particularly important for solid boards where the adhesive bonding is achieved through the mechanical interlocking of the adhesive into irregularities and pores of the carton-board surface. The formation of an adhesive joint with dispersion adhesives is affected by the rheological properties of the adhesive layer, the structure and absorption properties of the board surface. There are many test methods intended to determine the strength of an adhesive including peel, shear, cleavage and tension tests. Peel tests are common for tapes, labels, coatings and other bonded materials. The most common methods include T peel, Y peel and angle peel tests using tensile test machines. The cardboard adhesives that are currently in use have a large share of dispersion adhesives (PVAC, EVA, acrylic and PU) which are water-based adhesive systems that form bonds through physical hardening when the water evaporates. Sustainability issues require replacement of these chemicals with bio-based ones. Based on our previous research, bacterial nanocellulose (BNC) can increase the bonding strength of adhesive joints for different kinds of materials. In this study, 3 different cardboards with dispersion adhesive which had the addition of 7% of BNC were used. Zwick multitester with two methods (Y peel and T peel) was used to determine the strength of the cardboard joints. The results indicate differences in force elongation results due to different testing methods, where some of the cardboard properties and BNC had a positive effect on the overall adhesion joint strength.
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Gollins, Kenneth, Jack Chiu, Céline Baudrand e Feridun Delale. "Characterization of Adhesively Bonded Composite Joints Under High Strain Rate Loading". In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71711.

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With the advantage of having a high strength to weight ratio, composite materials are frequently being implemented as alternatives to steel and aluminum in military vehicles. To perform satisfactorily, joined composite laminates on a vehicle must be able to absorb a significant amount of energy under high strain rate loading events such as ballistic impact. In this paper the dynamic behavior and failure modes of adhesively bonded S2-glass/epoxy laminate joints are investigated. For this experiment, two structural adhesives are selected for comparison: a brittle methacrylate and a more compliant epoxy. The tests are conducted on an in-house assembled gas-gun to achieve the high strain rates necessary to break the adhesive bonds in two configurations, Mode I and II. Results obtained from the ballistic impact tests are compared to quasi-static test results to emphasize the rate-sensitivity of the bonded joints. Irrespective of the material configuration, the failure load of the adhesively bonded joint is seen to increase with the loading rate. Overall, epoxy appears to be 35–50% stronger than methacrylate by most measures. Under bending loading (mode I), most cases exhibit some amount of damage within the composite surrounding the bonded area, demonstrating a fiber-tear failure rather than a cohesive failure. The failure strength of the composite joint is thus not always proportional to the adhesion strength of the adhesive due to the weakness of delamination of the composite material, especially when loaded through the thickness of the composite. As compared with metal adherends, the composites are shown to absorb three times more energy per unit area.
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Rapporti di organizzazioni sul tema "Adhesive joints"

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Broughton, W. R. Durability performance of adhesive joints. National Physical Laboratory, giugno 2023. http://dx.doi.org/10.47120/npl.mgpg28.

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Broughton, W. R., e M. R. L. Gower. Preparation and testing of adhesive joints. National Physical Laboratory, giugno 2023. http://dx.doi.org/10.47120/npl.mgpg47.

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Kinloch, A. J., M. Fernando e P. Lam. The Cyclic Fatigue Behaviour of Adhesive Joints. Fort Belvoir, VA: Defense Technical Information Center, dicembre 1993. http://dx.doi.org/10.21236/ada277080.

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Kinloch, A. J., e M. Fernando. The Cyclic Fatigue Behaviour of Adhesive Joints. Fort Belvoir, VA: Defense Technical Information Center, giugno 1994. http://dx.doi.org/10.21236/ada280453.

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Spearing, S. M., B. L. Wardle e Qingda Yang. The Reliability of Adhesive Joints Under Piezomechanical Loading. Fort Belvoir, VA: Defense Technical Information Center, ottobre 2006. http://dx.doi.org/10.21236/ada456787.

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Metzinger, K. E., e T. R. Guess. How geometric details can affect the strength of adhesive lap joints. Office of Scientific and Technical Information (OSTI), dicembre 1996. http://dx.doi.org/10.2172/425260.

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Baker, B. R. Shear Strength Measurements on Adhesive-Bonded High Explosive Joints (Progress Summary). Office of Scientific and Technical Information (OSTI), giugno 2019. http://dx.doi.org/10.2172/1524743.

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Doyle, Jesse D., Nolan R. Hoffman e M. Kelvin Taylor. Aircraft Arrestor System Panel Joint Improvement. U.S. Army Engineer Research and Development Center, agosto 2021. http://dx.doi.org/10.21079/11681/41342.

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Abstract (sommario):
Aircraft Arresting Systems (AAS) for military applications utilize sacrificial panels made of Ultra-High Molecular Weight polyethylene (UHMWPE) that are embedded into the pavement beneath the AAS cable to protect the pavement from cable damage. Problems have been observed with the materials and practices used to seal the UHMWPE panel joints from water and debris. Data obtained from laboratory and field studies were used make improvements to current practice for sealing UHMWPE panel joints. The study evaluated four joint-sealant materials, eight alternative surface treatment and preparation techniques to promote adhesion to UHMWPE, and seven joint-edge geometries. Bond-strength testing of joint-sealant specimens was conducted in the laboratory, followed by field evaluation of construction techniques. Field performance of the joint systems was monitored for 24 months after installation. Additionally, a thermal response model was developed to refine the joint design dimensions. Results confirmed that the best material to use was self-leveling silicone joint sealant. It was recommended that a dovetail groove be cut into the edge of UHMW panels to provide positive mechanical interlock and to reduce adhesive failures of the sealant. It was also recommended that the panel-to-panel joint-sealant reservoir be widened to prevent sealant compression damage.
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Baker, B. R. Fabrication and Mechanical Testing of Small-Scale Adhesive-Bonded High Explosive (HE) Joints. Office of Scientific and Technical Information (OSTI), dicembre 2018. http://dx.doi.org/10.2172/1490923.

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Martin, Jonathan W., Edward Embree, Paul E. Stutzman e James A. Lechner. Strength and creep-rupture properties of adhesive-bonded EPDM joints stressed in peel. Gaithersburg, MD: National Institute of Standards and Technology, 1990. http://dx.doi.org/10.6028/nist.bss.169.

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