Strength prediction of steel-aluminium clinch-bonded composite joints based on response surface method
To establish the prediction model for the influence of process parameters and their interaction on joint strength,the test study of the clinch-bonded composite joining process was carried out on DP590 hot-rolled duplex steel and AA5052 aluminium alloy sheet using the response surface method.Taking adhesive layer thickness,punching pressure and die depth as influencing factors,and joint failure load and energy absorption value as response values,the regression model for strength prediction of steel-aluminium clinch-bonded com-posite joints was developed.The results show that the error between the prediction results of model and the test results is less than 10%,and the fitting degree of model is high and it can be used for strength prediction of steel-aluminium clinch-bonded composite joints.The variance analysis shows that the single factor has the same influence order from large to small on the failure load and energy absorption val-ue,which is die depth>adhesive layer thickness>punching pressure,the interaction of punching pressure and die depth is the greatest for failure load and the interaction of adhesive layer thickness and die depth is the greatest for energy absorption value.By analyzing the mod-el prediction results,it can be concluded that within a certain range,increasing the die depth can increase the failure load and the energy absorption value.In practical application,increasing the die depth and punching pressure and adding the binder can improve the joint strength.
clinch-bondingresponse surface methodregression modelfailure loadenergy absorption value
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