Publications

Farajkhah, V. and Guedes Soares, C. (2017), “Finite element study on the ultimate strength of aluminum plates joined by friction stir welding”, Progress in the Analysis and Design of Marine Structures, Guedes Soares, C. & Garbatov Y. (Eds.), Taylor & Francis Group, London, UK, pp. 609-615

Effects of friction stir welding (FSW) on the welding induced initial imperfections and buckling behavior of aluminum plates were investigated. A 3D, two-step, non-linear, thermo-mechanical analysis using the finite element code ANSYS was implemented to simulate the FSW butt welding process in aluminum plates. In the first step of the analysis, the thermal loads due to FSW were simulated and applied to the models and a transient thermal analysis was performed to calculate the temperature field history. In the second step, temperature distribution history calculated in the first step as well as the plunging force due to the FSW tool were applied to the structural model in a series of loads, where each load step represents an increment in the position of the welding tool. The structural analysis of the models result in welding induced residual stress, distortion and heat affected zone (HAZ). Following the simulation of FSW process, compressive loading was applied to the aluminum plates to obtain the load vs. shortening curves, buckling and post buckling behavior. A parametric study was then carried out to investigate the effects of FSW induced residual stress, distortion and HAZ on the buckling behavior and ultimate strength of the aluminum plates under compressive loading.

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