COMPARISON OF GAUSSIAN HEAT FLOW OF FSW RELYING ON VON MISES CRITERION AND CONSTITUTIVE MODELS OF YIELD STRENGTH

Ghassan Shaker  Abdul Ridha; Mohammed Abdulridha Abbas; Ramin Hashemi; Mohd Amri Lajis; Muhannad Ahmed

doi:10.5937/jaes0-46531

Ghassan Shaker Abdul Ridha Middle Technical University, Technical Institute Kut, Department of Electrical Techniques, Baghdad, Iraq
Mohammed Abdulridha Abbas Al-Furat Al-Awsat Technical University (ATU), Engineering Technical College-Najaf, Aeronautical Techniques Engineering Department, Najaf, Iraq; University Tun Hussein Onn Malaysia (UTHM Sustainable Manufacturing and Recycling Technology), Advanced Manufacturing and Materials Center (SMART-AMMC), Parit Raja, Malaysia
Ramin Hashemi Iran University of Science and Technology, School of Mechanical Engineering, Tehran, Iran
Mohd Amri Lajis University Tun Hussein Onn Malaysia (UTHM Sustainable Manufacturing and Recycling Technology), Advanced Manufacturing and Materials Center (SMART-AMMC), Parit Raja, Malaysia
Muhannad Ahmed Al-Furat Al-Awsat Technical University (ATU), Engineering Technical College-Najaf, Power Mechanics Techniques Engineering Department, Najaf, Iraq

DOI: https://doi.org/10.5937/jaes0-46531

Keywords: FSW, thermal history, constitutive models, von mises, strain hardening

Abstract

In the Friction Stir Welding (FSW) operation, the role of thermal applied load modeling is no secret to simulate the heat distribution produced from this process. Unfortunately, this modeling implemented in transient mode did not present an accurate model for the moving heat source resulting from FSW operation. The main reason for this issue is attributed to the confidence and deviation ratios, especially with the Gaussian Distribution (GD). Besides, the models adopted in this modeling did not utilize the constitutive models of yield strength for comparison. Accordingly, the current study aims to use GD with 99.75% and 0.25% ratios for confidence and deviation, respectively, in this thermal load. It also employed the Von Mises criterion with Voce, Hollomon, and Swift for this comparison as constitutive models. Accordingly, the hybrid models of the thermal load of FSW represented by Von Mises-Voce, Von Mises-Hollomon, and Von Mises-Swift have been adopted in the present study. These hybrid models were used with finite element simulation to validate the experimental thermal history of FSW for Al 6061-T6 under 800 rpm, 10 mm/min, and 15 kN for rotational speed, linear velocity, and applied force sequentially. Finally, this validation has proved the dominance of the Von Mises-Voce model for thermal history compared to other hybrid models. Moreover, this dominant model has also investigated the peak temperature with a 2.54% error ratio over the other hybrid models of thermal applied load in FSW.

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