Experimental Investigation on Self-Loosening of Preloaded Stainless Steel Fasteners
Umut İNCE Barış TANRIKULU N. Emrah Kılınçdemir Sezgin Yurtdaş Cenk Kılıçaslan
AbstractUse of stainless steel bolts has become widespread due to their high resistance to corrosive environment. However, the widespread use of stainless steel bolts brought together many unknowns in assembly conditions. In particular, there are not many studies present in the literature that concerning the behaviour of stainless steel fasteners under transverse vibration conditions. Within the scope of our work, Junker vibration tests were carried out on M12x1.75x40 A2-70 bolts with a combination of axisymmetric nut, double nut and prevailing nuts which all have a locking mechanism. Then, the vibration loosening rates were compared. In addition, Torque-Clamp load tests on existing bolts were performed to obtain friction coefficients and torque-clamp load graphics. The result of the study shows that stainless bolts and nuts with different mechanical locking mechanisms behave differently under vibrational conditions