... for both the analytical and finite element results on the bolt tension variation, clamp load variation and the clamp load loss caused by the incremental plastic bolt elongation under cyclic separating force. The proposed plastic model in the paper should be calibrated and be verified experimentally...

... initial value. Upon the removal of the cyclic tensile load, the bolted joint system reaches a new equilibrium point between the residual fastener tension and the joint clamping force. At the new equilibrium point, the fastener tension is reduced from its preload due to its plastic elongation...

...P. S. Lam; R. L. Sindelar; A. J. Duncan; T. M. Adams A compendium of mechanical properties of carbon and low alloy steels following hydrogen exposure has been assembled from literature sources. The property sets include yield strength, ultimate tensile strength, uniform elongation, reduction...

...Sayed A. Nassar; Aditya B. Veeram A high precision ultrasonic technique and a test apparatus are developed for the real time control of the fastener elongation during the tightening process of bolted joints. This is accomplished by monitoring the propagation of longitudinal ultrasonic waves through...

... useful for quality controllers and design engineers since it is able to predict, for instance, the minimum and maximum snug torques, permanent elongation, final torque and preload after tightening. Comparisons are made between the results found of Monte Carlo simulations, series expansions...