Methods of Improving Joint Efficiency

Bevelled lap - good, usually practical, difficult to mate 

Recessed double strap - good, expensive machining 

Bevelled double strap - very good, difficult production 

The types of loads and joints that concentrate stresses in small areas or on edges should be avoided. Joints that stress the adhesive in shear are preferable because adhesives generally show considerable strength under this type of stress. Sudden applications of load, such as during impact, require the use of elastic or resilient adhesives to absorb the shock. Brittle adhesives will ordinarily fail under such conditions.  

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