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| Friction and Influence in FEM Simulation of Local Loading Process for Titanium Alloy Rib-Web Component |
| ZHANG Dawei |
| (School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China) |
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Abstract 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.
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2017, 
