The effect of laser stitch welding residual stress on the dynamic behaviour of thin steel structure

  • M. A. S. Aziz Shah Structural Dynamics Analysis and Validation (SDAV), Faculty of Mechanical Engineering, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia. Phone: +60355436202; Fax: +60355436202
  • M. A. Yunus Structural Dynamics Analysis and Validation (SDAV), Faculty of Mechanical Engineering, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia. Phone: +60355436202; Fax: +60355436202
  • M. N. Abdul Rani Structural Dynamics Analysis and Validation (SDAV), Faculty of Mechanical Engineering, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia. Phone: +60355436202; Fax: +60355436202
  • A. M. Saman Structural Dynamics Analysis and Validation (SDAV), Faculty of Mechanical Engineering, Universiti Teknologi MARA (UiTM), 40450 Shah Alam, Selangor, Malaysia. Phone: +60355436202; Fax: +60355436202
  • M. S. M. Sani Faculty of Mechanical Engineering, Universiti Malaysia Pahang 26600 Pekan, Pahang, Malaysia
  • M. S. Mohd Zin Faculty of Mechanical Engineering, Universiti Malaysia Pahang 26600 Pekan, Pahang, Malaysia
Keywords: Laser stitch welding, experimental modal analysis, residual stress

Abstract

Laser stitch welding is one of the most reliable and efficient permanent metal joining processes in the automotive industry, particularly in the manufacturing of a car body-in-white (BIW). It is widely known that this welding process induces the generation of residual stresses that can influence the dynamic behaviours of welded structures. In order to accurately predict the dynamic behaviours of these welded structures, it is important to experimentally understand the influence of residual stress. Therefore, this study addresses the finite element modelling method of thin steel welded structures with and without the influences of residual stress in order to identify its effect towards dynamic behaviours. The finite element models of thin steel welded structures are developed by employing the area contact model (ACM2) format element connector.  The accuracy of the finite element models is then compared in terms of natural frequencies and mode shapes with the experimental counterparts. The dynamic behaviours of the measured structure are obtained using an impact hammer with free-free boundary conditions. The results demonstrate the importance of considering the influence of laser stitch welding residual stress in predicting the dynamic behaviours of thin steel welded structure.

 

 

Published
2019-12-30
How to Cite
Aziz Shah, M. A. S., Yunus, M. A., Abdul Rani, M. N., Saman, A. M., M. Sani, M. S., & Mohd Zin, M. S. (2019). The effect of laser stitch welding residual stress on the dynamic behaviour of thin steel structure. Journal of Mechanical Engineering and Sciences, 13(4), 5780-5790. https://doi.org/10.15282/jmes.13.4.2019.05.0461