This investigation describes a method for estimating the absolute lock effect in bolted joint. Observation results of loosening phenomenon in industrial vehicle are analyzed for the linear relation by the proposed regression formula. Based on the relation, in early stages of the development test, the rate of clamping force decrease can be estimated accurately after prolonged operation by measuring the clamping force behavior. The tendency to decrease is observed about the depression type and working load type loosening. For evaluation design bases, the residual clamping force estimation chart is established. The L-N (Loosening Lifetime - Number of Cycles to Loosening N) diagram is proposed for the loosening lifetime prediction for working load type loosening also. Using the loosening damage (cumulative decrease of clamping force) and L-N diagram, the lifetime to loosening failure can be predicted accurately for the locking device and method as an absolute evaluation.
Residual Clamping Force Estimation and Lifetime Prediction to Loosening Failure of Bolted Joints
Sae Technical Papers
WCX™ 17: SAE World Congress Experience ; 2017
2017-03-28
Aufsatz (Konferenz)
Englisch
Finite Element Modeling of Self-Loosening of Bolted Joints
Online Contents | 2007
|An Experimental Study of Self-Loosening of Bolted Joints
Online Contents | 2004
|A Study of Loosening and Fatigue Failure of Bolted Joints under Transverse Vibration (20065254)
British Library Conference Proceedings | 2006
|A Study of Early Stage Self-Loosening of Bolted Joints
Online Contents | 2003
|