Iranian Journal of Manufacturing Engineering

Iranian Journal of Manufacturing Engineering

Experimental and numerical study of the effect of tensile speed on the strength of friction stir overlapping welding of polyamide Sheets

Document Type : Original Article

Authors
Hadi Safi Valilu 1
Moosa Sajed 1
Mohammad Ali Saeimi Sadigh 1
Sourosh Soltani Barcheloei 1
Vahid Tavoosi 2
Alireza Mohammadi 1
1 Department of Mechanical Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran
2 Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran
10.22034/ijme.2025.526860.2090
Abstract
This research investigates the effect of strain rate on the strength of friction stir welded joints. Experimental tests were conducted on overlapping polyamide sheets, as strain rate significantly influences the mechanical behavior of thermoplastics. To evaluate the impact of strain rate on the joint strength of polyamide, four displacement rates (20, 30, 40, and 50 mm/min) were examined in tensile tests. The results demonstrated that the maximum strength of 1792.5 N was achieved at the displacement rate of 20 mm/min. Furthermore, the findings revealed an inverse relationship between displacement rate and tensile strength in polyamide joints. For more precise evaluation of joint behavior, the tensile test conditions were simulated using ABAQUS finite element analysis software. The numerical results showed good agreement with experimental data, confirming the reliability of this computational model for predicting joint behavior under tensile loading conditions. The developed finite element model effectively captured the stress distribution and failure mechanisms observed in the physical tests, validating its applicability for mechanical analysis of friction stir welded thermoplastic joints. This research provides valuable insights into the strain rate sensitivity of polyamide friction stir welds, with implications for optimizing welding parameters in industrial applications where dynamic loading conditions are anticipated. The combination of experimental and numerical approaches offers a comprehensive understanding of the mechanical performance of these joints across different loading rates.
Keywords
Friction Stir Welding, Polyamide Sheets, Tensile Test, Strain Rate, Strength
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Iranian Journal of Manufacturing Engineering
Volume 12, Issue 7 - Serial Number 93
September 2025
Pages 18-30