Abstract
Loosening of bolted joints under a vibratory environment has been an ongoing problem associated with many engineering applications. Loss of the fastener and fatigue failure due to loss of pre-tension are the predominant failure modes.The paper analyses two possible mechanisms of vibration loosening and identifies critical parameters in preventing loosening. The mathematical models developed establish the effect of various bolted-joint related parameters on vibration loosening and joint integrity. It also develops rules-of-thumb for prevention of vibration loosening. Finally, based on the results of the mathematical model it discusses the common locking devices and their correct usage and limitations.
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