Intrinsic static strength of friction interfaces augmented with anaerobic adhesives

The paper is focused on the static strength of friction joints supplemented with anaerobic adhesives. Through torsional tests on the annular interface between tubular steel specimens, the friction and the adhesive contributions to the overall strength are determined as a function of the clamping force. The analysis shows no interaction of the component strengths, with the frictional strength proportional to and the adhesive strength independent of the clamping force as if the underlying mechanisms were acting separately. This cumulative performance, intrinsic of the interface in the homogeneous test conditions attained, should be exploited to the full when designing efficient real joints based on this hybrid technology.