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Wednesday, July 10 • 10:30 - 13:00
SHOCK PROPAGATION THROUGH A BOLTED JOINT STRUCTURE UNDER IMPACT LOADING

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Bolted joint structures experience multiple nonlinearities such as material behavior, initial bolt tightening, and friction. The objective of this work was to develop computational approaches for predicting shock transmission through a bolted joint structure subjected to impact loading. As an example, we considered the case of a cylindrical test fixture with a bolted cover. The cover was subjected to impact loading from a drop-weight tower, which results in a shock that propagated to the fixture through the bolts. The experiments were simulated using a finite element approach. The proposed model included factors that could affect the transient response including, bolt tightening, bolt-nut interaction, and material models. The simulation and experimental results were compared based on plastic strain of the bolts. Acceleration results were filtered based on Fast Fourier Transforms (FFT) and then compared. The simulation results were in an acceptable agreement with the experimental ones in terms of shock arrival time at the fixture body and peak magnitude. The results showed that finite element could be used to predict shock propagation through a bolted joint experiencing impact loading and therefore reducing the need for extensive experimental testing.


Wednesday July 10, 2019 10:30 - 13:00 EDT
St-Laurent 3, Board 14-A
  T07 Struct. dyn. & nonlin. vib., RS05 Fatig fractr & jnt interf