Abstract
This chapter critically reviews the available literature for predicting the strength of lap joints and to indicate the way in which the reader can carry out an appropriate analysis for a variety of adhesives and adherends, where “appropriate” has implications of cost, ease of use, confidence, and accuracy. The chapter indicates the places where simple algebraic solutions can be used and the places where it may be necessary to carry out a finite element analysis. Adhesives do not provide a panacea for the joining requirements of the designer or engineer. Also, there remains a perceived lack of confidence in the ability to predict the behavior of structural adhesive joints without investing significantly in the programmers of extended mechanical testing. This reduces the economic attraction of employing them, and one of the chief aims of the chapter is to improve this situation. The chapter shows that a very simple approach can be used for predicting the lap shear strength of adhesively bonded joints for ductile adherends and ductile adhesives. It therefore recommends that finite element analysis should always be used in these more complex cases.
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