An FEA based study of thermal behaviour of ultrasonically welded phosphor bronze sheets

Authors

  • Bharat Sanga Department of Mechanical Engineering, Guru Nanak Dev Institute of Technology, Delhi 110089, India. Phone: +919013310266
  • Reeta Wattal, Dr. Department of Mechanical Engineering, Delhi Technological University, Delhi 110042, India
  • D. S. Nagesh, Dr. Department of Mechanical Engineering, Delhi Technological University, Delhi 110042, India

DOI:

https://doi.org/10.15282/jmes.15.2.2021.10.0635

Keywords:

Ultrasonic welding, FEA, simulation, SimScale, heat flux, temperature profile, thermocouple, plastic deformation, friction

Abstract

The ultrasonic joining of phosphor bronze sheets is analyzed using a 3-D finite element model for the study and prediction of the thermal profiles at the weld interface. The heat fluxes are calculated and assigned as boundary conditions during the thermal simulation. The forecast of temperature is done under various welding conditions. The maximum temperature obtained by transient simulation at the weld interface is 366.74℃. The continuous reduction in the temperature is observed towards the extremes of the weld metal. The sonotrode and the anvil achieve a lower temperature in comparison to the weld interface. The effect of clamping force and bonding ratio on the interface temperature is observed as positive. The model is validated with an error of 1.576% between the observed and predicted temperature results and a correlation co-efficient 0.96 is established between the simulated temperature results and the weld strength. Sufficiently strong joints were obtained at the optimum welding conditions with 74% joint efficiency. It is evident that the interface temperature has a strong linear relationship with joint strength and is a major deciding factor for achieving strong joints.

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Published

2021-06-10

How to Cite

Sanga, B., Wattal, R., & Nagesh, D. S. (2021). An FEA based study of thermal behaviour of ultrasonically welded phosphor bronze sheets. Journal of Mechanical Engineering and Sciences, 15(2), 8057–8071. https://doi.org/10.15282/jmes.15.2.2021.10.0635

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