Tubular bonded joint

This rule refers to circular bonded joints, for example, tubular bonded joints or shaft-hub joints, with heat or hot-curing reactive adhesives, if different metal materials are to be bonded, Figure 11.5. 

Figure 11.7 (a) Plane bonded joints (b) comer joints (c) attached joints (d) tubular bonded joints. 

Without going into too mnch mathematical and analytical detail, it suffices to state that the axial strength of tubular bonded joints can be estimated by the traditional analytical approaches, such as that developed by Volkersen in 1938 (Adams et al, 1997). According to Volkersen, the maximum adhesive shear stress in a lap joint can be estimated by ... 

The most commonly used adhesively bonded joining methods for composite pipes are (1) adhesive-bonded socket joints, (2) tubular lap joints, (3) heat-activated coupling joints (similar to (1)) and (4) flanged joints (see Fig. 18.7). The first three configurations are considered as permanent joints, while the flanged joints provide the opportunity and ease of quick assembly/disassembly for installation, inspection, and repair. Nevertheless, most composite flanges are... 

A more exact formulation for assessing the stress distribution in tubular bonded single-lap and socket joints is provided by Zou and Taheri (2006). 

As part of a US Army-sponsored programme, Martin Marietta Laboratories [17] conducted mathematical joint analysis and tested prototypes of tubular aluminium alloy joints bonded with a toughened adhesive. It is found that the tubes failed by tubular buckling at loads considerably lower than the expected limit load of the bonded joint. 

Adhesive bonding provides a convenient and light method of assembling structures consisting of thin-walled tubes. Typical joints in such structures are the tubular lap joint shown in Fig. 5 and the very similar tubular scarf joint. 

Adams RD, Peppiatt NA (1977) Stress analysis of adhesively-bonded tubular lap joints. J Adhes 9 1... 

However, most of these improvement methods are traditionally based on the mechanical stiffening m ods. They cannot adaptively adjust the stress distribution. In order to smartly and efficiently improve the joint strength, Cheng and his-coworkers have recently introduced a smart joint concept into the traditional adhesively bonded joint by integrating with piezoelectric materials, which have been confirmed as a very effective method to smartly reduce the stress concentration in the adhesive layer. Here, we will give an overview on the state-of-the-art of the adhesively bonded smart beam-like and tubular joints [9-13]. 

Design aspects of adhesively bonded tubular joints... 

Keywords Adhesive modulus Adhesys expert system Co-axial joints Compression Concealed joints Creep Elastic limit Epoxy Epoxy composite Einite element analysis Glue line thickness Goland and Reissner Hart-Smith Heat exchanger Hooke s Law Joint designs Joint thickness Lap shear strength Peel Plastic behaviour Polyurethane Pipe bonding Shear stresses Shear modulus Stress distribution Thick adherend shear test Tubular joints Volkersen equation Young s modulus... 

Prickett and Hollaway(29) presented both classical and finite-element solutions for elastic-plastic adhesive stress distributions in bonded lap joints. Single, double, and tubular lap configurations having both similar and dissimilar adherends were considered. The results show how the development of adhesive yielding will occur as the joints are loaded to a failure... 

Xu W, Li G (2010) Finite difference three-dimensional solution of stresses in adhesivdy bonded composite tubular joint subjected to torsion. Int J Adhes Adhes 30 191-199... 

Kwon and Lee (2000) studied the influence of surface roughness on the strength of tubular joints by modeling the stiffness of the interfacial layer between the adherends and the adhesive as a normal statistical distribution function of the surface roughness of the adherends. The authors found that the optimum surface roughness was dependent on the bond thickness and applied load. 

Kim KS, Kim WT, Lee DG, Jun EJ (1992) Optimal tubular adhesive-bonded lap joint of the carbon fiber epoxy composite shaft. Gompos Struct 21 163 Kohen GW (1954) Design manual on adhesives. Machine Design, April... 

Kwon JW, Lee DG (2000) The effects of surface roughness and bond thickness on the fatigue life of adhesively bonded tubular single lap joints. J Adhes Sci Technol 14 1085... 

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