... for the minimum fastener preload required for preventing self-loosening. The effect of several key variables is investigated; this includes bearing and thread friction coefficients, cap screw grip length, thread pitch, material, and cyclic amplitude of the transverse excitation. An experimental setup and test...

...Xianjie Yang; Sayed Nassar In an effort to establish a theoretical outline of a criterion for preventing the vibration-induced loosening of preloaded threaded fasteners, this paper provides an experimental and analytical insight into the effect of the initial bolt preload and the excitation...

...Sayed A. Nassar; Xianjie Yang A mathematical model is proposed for studying the vibration induced loosening of threaded fasteners that are subjected to harmonic transverse excitation, which often causes slippage between the contact surfaces between engaged threads and under the bolt head. Integral...

... that “stick-slip” vibrations can occur in such systems. lead screw dynamics friction-induced vibration stick-slip nonlinear dynamics nonlinear vibration and limit cycles automotive components damping fasteners friction mechanical stability noise pollution seats vibrations 07...

... eventual electrical failures, such as the chatter of electromagnetic relays. 22 05 2007 27 11 2007 14 07 2008 aerospace instrumentation aerospace test facilities fasteners finite element analysis plates (structures) shock waves space vehicles vibrations pyroshock...

...Basil A. Housari; Sayed A. Nassar This study provides a theoretical and experimental investigation of the effect of the thread and bearing friction coefficients on the self-loosening of threaded fasteners that are subjected to cyclic transverse loads. The friction coefficients are varied by using...