Optimization of process parameters for friction stir lap welding of carbon fibre reinforced thermoplastic composites by Taguchi method

다국어 초록 (Multilingual Abstract)

Friction stir welding process parameters such as welding speed, rotational speed and tilt angle affect the strength of the weld joint. Formaximizing the weld strength, these process parameters must therefore be properly selected and optimized. This study presents anapplication of Taguchi method to optimize process parameters like welding speed, rotational speed and tilt angle to maximize lap weldtensile-shear strength in 4 mm thick polypropylene composite sheets with 20 wt% carbon fiber. To this end, a L9 orthogonal array ofTaguchi method using three factors at three levels was used. Analysis of variance and confirmation tests were conducted. The resultsindicated that welding speed, rotational speed and tilt angle are respectively the significant parameters affecting the lap weld strength.

Optimization results also showed that tensile-shear strength of 6.06 MPa was obtained when welding speed, rotational speed and tiltangle were 25 mm/min, 1250 rpm and 1 degree, respectively.

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