Study of damping in layered and welded aluminium cantilever beams of unequal thickness with interlayer slip

Abstract

Aluminium being lighter is mostly used to fabricate structures in aerospace and automotive industries. Welded joints are the common technique used to assemble the parts in those applications. These joints have a great potential to reduce the vibration levels thereby enhancing their life. In the present study, a mathematical model has been developed to estimate the damping capacity of layered and tack welded aluminium cantilever beams of unequal thickness. It is observed that there are number of vital parameters that govern their damping capacity. An experimental verification has been carried out to justify the analysis as well as to study the effect of these parameters. The developed damping model of the structure is found to be in fairly good agreement with the measured data.

Keywords:

• Slip damping
• tack welded joint
• amplitude
• unequal thickness
• in-plane bending stress

Additional information

Notes on contributors

B Singh

Bhagat Singh is a Research Scholar in the Department of Mechanical Engineering, National Institute of Technology at Rourkela, India. He graduated from National Institute of Technology at Kurukshetra, India. He completed his Masters from National Institute of Technology at Rourkela, India. Currently, he is pursuing his research work under the guidance of Prof Dr B. K. Nanda. He has teaching experience of more than seven years. He has published 14 papers in international journals and conferences. His research area is structural vibration.

B K Nanda

B. K. Nanda is a Professor in the Department of Mechanical Engineering, National Institute of Technology at Rourkela, India. He has both teaching and research experience of more than 30 years in the field of machine tool design and structural vibration. He has published more than 55 papers in international and national journals and conferences including Journal of Sound and Vibration, International Journal of Acoustics and Vibration, Journal of Vibration and Control, Structural Engineering and Mechanics: An International Journal, Australian Journal of Mechanical Engineering and Transactions of the Canadian Society of Mechanical Engineering. He has reviewed many papers of international journals like Journal of Sound and Vibration, Transactions of CSME, Trends in Applied Sciences Research and many others. He is a member of the Editorial Board of the journal Trends in Applied Sciences Research. He has been awarded with many gold medals for his scientific publications.