Modeling the predictive values of ultimate tensile strength in welded joint by response surface methodology

Strength always remains the prime requirement of any produced products, which normally explicate the capability of the products to sustain stress into it. Ultimate tensile strength is principally used to clarify the maximum values of stress, which can be resist by any product or material entity before breaking. Accordingly, study is conducted to verify the methodological way of determining the predictive values of ultimate tensile strength in welded joint. Response surface methodology is used in present study to grace decision results. In present study, the Metal Inert Gas (MIG) welding process is experimentally performed in mild steel plate specimens by considering three distinguish values of welding current, voltage and plate thickness. The objective of the study is to enroll the predictive equation to assists in deriving the elevated values of ultimate strength of the welded joint. The primary objective of present study is to demonstrate the utilization of competent structure of Response surface methodology under the dimensional arena of welding process. Here, the authors devised equation, which competently possess caliber to define the predicted values of ultimate tensile strength for the precise values of process parameter. The same assist in precisely understanding the behavior of ultimate tensile strength (dependent variable) under the influence of independent variables i.e. welding current, voltage and plate thickness. Response surface methodology is used and experiments based on Box-Behnken Design are performed in present study. The work is supported by MINITAB software for generating graphs and originating driving equation between response and process parameters. The predictive values are determined based on multiple regression equation and compared with actual experimental values to demonstrate capability and applicability. (C) 2021 Elsevier Ltd. All rights reserved.