Effect of misaligned plates and varying interfacial area on bolted structures

Ranjan, Prabhat and Pandey, Ashok Kumar (2022) Effect of misaligned plates and varying interfacial area on bolted structures. International Journal of Mechanical Sciences, 233. pp. 1-12. ISSN 0020-7403

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Abstract

The perfect alignment of holes cannot be guaranteed while assembling the parts using the bolted joint. The misalignment of plates affects the contact pressure distribution at the bolted plate interface. In addition, the varying contact area at the bolted joint interface affects both the friction and the contact pressure distribution. The variation in the contact pressure and friction at the interface affects the dynamic behavior of the bolted structure. Accuracy of frictional energy dissipation is a prerequisite in predicting the dynamics of the bolted structure. Driven by this demand, we have developed an analytical model to predict the effect of hole misalignment and varying plate interface area on the frictional energy dissipated by the bolted structure. For misaligned bolted plates, we observed an asymmetric hysteresis loop with different maximum and minimum force magnitude. In addition, the bending of the bolt shank for misaligned holes is also observed. The contact area between plates does not affect the energy dissipation when contact pressure drops to zero at the plate interface. However, when the contact pressure does not drop to zero, the contact area between plates affects the energy dissipation and the tangential stiffness of the bolted joint. All these phenomena are modeled using the Iwan-based analytical models developed using the pressure profile obtained from the FEM simulation result. The developed analytical model is validated using the hysteresis loop obtained from FEM simulation results. It is observed that the developed analytical model can predict all the phenomena discussed above and can capture the hysteresis loop with reasonable accuracy for all the cases considered. © 2022 Elsevier Ltd

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IITH Creators:

IITH Creators	ORCiD
Pandey, Ashok Kumar	https://orcid.org/0000-0002-5878-6451

Item Type:

Article

Additional Information:

The first author would like to acknowledge the fellowship provided by the Department of Higher Education, Ministry of Education, Government of India. The work is also partially supported by AR&DB, NEW Delhi, India , with project number 1824 .

Uncontrolled Keywords:

Bolt bending; Energy dissipation; Iwan model; Misaligned holes

Subjects:

Physics > Mechanical and aerospace

Divisions:

Department of Mechanical & Aerospace Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

05 Sep 2022 05:15

Last Modified:

05 Sep 2022 05:15