Stress Waves Propagating Through Bolted Joints
This paper examines the mechanical response of a simple bolted joint, the Brake–Reu\(\ss\) beam, under shock loading. This is done by creating a high-fidelity finite element model of the beam and subjecting it to a quasi-static bolt load followed by a dynamic shock load. The influence of several parameters on the beam’s response is studied, which include impact force, impact duration, impact location, and residual stress. The results indicate that when the energy input into the beam is held constant, the most influential parameter is the shock’s frequency and that increasing its frequency significantly increases dissipation. The next most influential parameter is the impact location, though its effect is frequency dependent and becomes stronger for higher frequencies. Finally, the results show that while residual stresses can significantly modify the contact-pressure distribution, they have minimal influence on the energy dissipated due to friction resulting from shock loading.
KeywordsBolted joints Interfacial mechanics Frictional dissipation Wave propagation Dynamic contact
- 1.Brake, M.R., Reuß, P., Segalman, D.J., Gaul, L.: Variability and repeatability of jointed structures with frictional interfaces. In: Dynamics of Coupled Structures, Volume 1: Proceedings of the 32nd IMAC, a Conference and Exposition on Structural Dynamics, pp. 245–252, 2014. doi: 10.1007/978-3-319-04501-6_23
- 2.Smith, S., Bilbao-Ludena, J.C., Catalfamo, S., Brake, M.R.W., Reuß, P., Schwingshackl, C.W.: The effects of boundary conditions, measurement techniques, and excitation type on measurements of the properties of mechanical joints. In: Nonlinear Dynamics, Volume 1: Proceedings of the 33rd IMAC, a Conference and Exposition on Structural Dynamics, pp. 415–431, 2016. doi: 10.1007/978-3-319-15221-9_36