SENSITIVITY ANALYSIS OF FRICTION STIR WELDING PROCESS AND TOOL PARAMETERS FOR JOINING AA1100 ALUMINIUM ALLOY JOINTS
Keywords:
Friction Stir Welding, AA1100 alloy, Central Composite Design, Regression Analysis, Sensitivity AnalysisAbstract
This paper focuses on the development of empirical relationship for the prediction of tensile strength of friction stir welded aluminium alloy joints. Experimental part of the study is based on five level central composite designs of six (process and tool) parameters. In order to investigate the effects of input parameters on tensile strength, an empirical relationship is constructed by multiple regression analysis. A sensitivity analysis is carried out and compared the relative impact of input parameters on tensile strength in order to verify the measurement errors on the values of the uncertainty in estimated parameters. The results obtained show that developed empirical relationship can be applied to estimate the effectiveness of process and tool parameters for a given tensile strength. The tool hardness is more sensitive than shoulder diameter, axial force, rotational speed, pin diameter and welding speed
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