Isothermal local loading process provides an efficient approach to manufacture large-sized titanium-alloy ribweb component with saving force and high performance. However

the forming process is complex

and the material parameter

geometric parameter and processing parameter have a stronger coupling action in the forming processing

so the accurate prediction about the process is difficult. The finite element simulation provides a powerful approach for analyzing and optimizing this complex forming process. The friction model and friction condition are one of the key boundary conditions in numerical simulation

which play an important role in accuracy and reliability of predicted results. In this paper

the influences of the friction models such as Coulomb friction model

shear friction model

Coulomb-shear friction model and Coulomb-sticking friction model

and the magnitude of friction on the simulation results for local loading process of rib-web component have been analyzed. The results in the present study indicate that: The shear friction model is suitable for the modeling and simulation of local loading process; Accurate friction condition can decrease predicted error of forming loadby more than 15%; Active controlling the friction in local zone will improve the cavity filling and reduce the forming defect.