The measurement of the shear strength of adhesive joints in torsion

Abstract

The design of adhesive joints is discussed. The simplest distribution of applied stress occurs when two thin-walled circular tubes are joined coaxially by an annular adhesive layer which is normal to the axis and of constant thickness. When this assembly is subjected to torsion, the resultant pure shear is evenly distributed throughout the joint, in distinction from any other design. This is therefore a potential technique for measuring the fundamental adhesive strength. The published work on this system is reviewed, with particular reference to the effect of varying the joint dimensions.