Optimization of loading path in hydroforming of parallel double branched tube through response surface methodology

In this work, the response surface methodology along with the finite element method was employed to optimize the loading path for hydroforming parallel double branched tube parts. A combination of experimental design, numerical simulations and regression analysis was utilized, to determine the mathematical models between objectives and design variables. Consequently, the effectiveness of the models was evaluated through variance analysis and was utilized to predict the behavior of the tube hydroforming process. The effects and corresponding interactions of the design variables on the parallel double branched tube hydroforming were illustrated and discussed. Moreover, the response surface methodology and desirability method were applied, in order to obtain the optimal loading path within the given optimization criteria. The optimized result was in good agreement with the experimental results.