Overlap Joint

The overlap joint is the most commonly used adhesive joint. These joints are extremely simple, quick and easy to create, and are obtained by simply overlapping the components to be joined. This joint can be used with a wide variety of adhesives and substrate thicknesses. The major benefit of this joint is that it can bond extremely thin materials while providing excellent strength. This joint is strongest when forces are applied parallel to the substrates, but it also performs reasonably well when subjected to a variety of stresses. However, if an overlap joint is staggered and the shear forces are not aligned under very high stress loads, this can lead to substrate deformation, as shown in Section 4.

Figure 113 Overlap joint Joggle Lap Joint

The joggle lap joint is a simple method joint designed to address the shortcomings of the simple overlap joint. A properly implemented joggle lap joint will align loads, which will help prevent substrate deformation under high stress loads. The ‘joggle’ will also facilitate the joint assembly by providing a physical and visual indicator of where the bond line is to be situated. This type of joint can be made by simply bending the supports and requires minimal extra processing. This is the simplest and easiest-to-implement design for aligning loads.

Figure 114 Joggle lap joint

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