Typical Joint Designs

Joggle lap joints. This is the easiest design for aligning loads. This joint can be made by simply bending the adherends. It also provides a surface to which it is easy to apply pressure.  

Double lap joints. These joints have a balanced construction that is subjected to bending only if loads in the double side are not balanced. 

Beveled lap joints. These joints are also more efficient than plain lap joints. The beveled edges allow conformance of the adherends during loading, with a resultant reduction of cleavage stress at the ends of the joint. 

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FIGURE 7.25 Typical joint designs used in ultrasonic welding. ... 

Having explained the phenomena governing the behavior of adhesively bonded joints, it is appropriate to conclude this chapter with an outline of the steps involved in the typical Joint-design process. 

Typical joint designs possible using TIG are butt, lap, fillet and edge (see Appendix B - Weld Joint Configurations). 

Typical joint designs lap (RSW and RSEW), edge (RSEW), butt (FW and ESW), attachments (PW). 

Typical joint designs possible using gas welding butt, fillet, lap and edge, in thin sheet. 

Typical Joint designs using brazing lap and scarf in thin Joints with large contact areas or a combination of lap and fillet. Fillets can help to distribute stresses at the Joint. Butt Joints are possible but can cause stress concentrators in bending. 

The alumina-superalloy joints are intended to withstand high service temperatures (700 -1000 C) and thermal cycles typical in power generation processes. The fabrication of a joint should provide a relatively good strength but more important that it will remain relatively stable in the service conditions. Therefore, experimental studies for the joint design optimisation should be carried out and the data for novel procedures and for modelling the FG-structure and FE-analysis should be created. 

The ultrasonic welding of ETFE can be achievedl" with a weld factor of 0.8. The success of this technique is dependent on joint design and welding parameters such as the contact time and pressure. Typical welding conditions include a contact pressure of 170 kPa and a cycle time of 2 secs. 

Piping tierods are used to restrain the anchor force produced by the particular group of pipe-joints which tend to pull apart when subjected to internal pressure. Figure 1-135 shows a typical tierod design. 

The design details of tierods around an expansion joint shall be such that the required function of the expansion joint is not jeopardized. In certain cases it is necessary to specify a particular gap between the tierod anchor and the tierod stop. See Figure 7-135 for typical tierod design detail. 

Fig. 13.15 Typical friction stir weld joint designs...

Typically the structure and the dimensions of the members to be joined are fixed before the joint design procedure is commenced, i.e. the joint has to be designed using adherends which have a structure determined by requirements other than those arising from the joint design. However, some important factors concerning adherends should always be considered when designing bonded joints between composite adherends. 

The preliminary design of a cast-in joint may be performed using the design procedures for adhesively bonded double-lap joints. Typically a cast-in joint design... 

Conveyor silent ehains often use flat-baek link plates that provide a smooth conveying surface and may use joint designs that resist fouling. Conveyor silent chain is frequently used to convey hot glassware and other products where ventilation from below the conveyor is desired, or where exceptionally smooth transport is required. A typical silmt chain conveyor is pictured in Figure 1-26. 

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