دکتر فرامرز آشنای قاسمی صفحه شخصی دکتر فرامرز آشنای قاسمی
Hedi Ahmadi, Nasrollah Bani Mostafa Arab*, Faramarz Ashenai Ghasemi
Archives Des Sciences, Volume 65, Issue 7, 2012(7), Pages 59-74. (JCR)
Abstract
In this article, friction stir welding has been used for lap joining polypropylene composite plates having 20 wt% glass fiber. The effects of important process parameters such as tool rotational speed, welding speed, tilt angle and tool pin geometry on tensile shear strength were investigated using the Minitab software and the Taguchi method of design of experiments. A L16 orthogonal array with four factors at four levels was employed to evaluate effects of rotational speed ( 630, 800, 1000 and 1250 rev/min), welding speed (12, 16, 20 and 25 mm/min), tilt angle (0, 1, 1.5 and 2 degree) and tool pin geometry (threaded cylindrical tool, threaded cylindrical-conical tool, simple cylindrical-conical tool and threaded conical tool) on tensile shear strength of the lap joints. The results indicated that the tensile shear strength was maximum when rotational speed, welding speed, tilt angle and tool pin geometry were 1000 rev/min, 20 mm/min and 1 degree respectively with threaded cylindrical-conical tool. Analysis of variance was performed to calculate the percentage of contribution of each factor on tensile shear strength. It was found that, the rotational speed, welding speed, tool pin geometry and tilt angle were significant factors respectively.
Keywords
Polypropylene composite; Friction stir welding; Tensile shear strength; Taguchi method, Analysis of variance.
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