Optimization of Bonding Process Parameters of Automotive Exterior Plastic Parts Based on the Response Surface Method
To improve the load-bearing capacity of the plastic parts for automotive exterior finishes,the static strength and mechanical properties of the plastic parts for automotive exterior finishes were analyzed by ABAQUS,and the bonding process parameters were optimized by the response surface method.With the adhesive strength as the evaluation index,a Box-Behnken simulation experiment scheme was designed using Design Expert,which included three factors of adhesive layer thickness,adhesive layer width and adhesive edge distance in the bonding process parameters.Numerical simulations were carried out on all experimental schemes,and secondary response surface models were constructed according to the numerical simulation results.F-test,complex correlation coefficient R2 analysis and residual analysis of the model were carried out to verify the feasibility of the model,and sequential quadratic programming(SQP)algorithm was used to optimize the process parameters.The results show that the sequence of significant effects on adhesive strength is adhesive layer thickness>adhesive layer width>adhesive edge distance.The optimal combination of bonding process parameters is obtained.The adhesive layer thickness is 0.29 mm,the adhesive layer width is 3.31 mm,and the adhesive edge distance is 11.55 mm.The predicted maximum strength of the adhesive structure is 23.75 MPa,which is 19.49%higher than that before optimization(19.87 MPa).The experimental results show that the experimental value of adhesive strength is 22.91 MPa,and the relative error between the predicted and experimental values is 3.54%.
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