Stress Relaxation Processes in Wire Wrapped Joints

A standard system of determining stress relaxation behavior in wrapped joints has been developed. The system uses extended length wrapped terminals with i00 turns of wire and monitors the elastic stress reduction in terms of the relaxation of axial twist in the terminal by means of an optical magnification technique. The effect of various joint parameters on stress relaxation behavior of secondary wrapped joints has been evaluated and correlated with Contact resistance changes observed in similar joints after quaiification approval testing. The effects of various wrapping wire Parameters and of terminal cross section On the stress relaxation behavior of primary Wrapped joints has also been investigated.