The 3D Numerical Simulation And Mechanical Properties Research On The Hot Rheological Forming Of The Secondary Titanium Alloy Vane Disk Of A Helicopter

The theory of rheological forming, a deformation theory of greater universal significance, has been developed recent years based on the theories of plastic forming, super-plastic forming and creep forming. It is the practical application of rheology to plastic working field. The theory is being widely accepted and applied for scientific research as well as production practice, and is showing its strong vitality and practical prospect.As a new aeronautic material, TC11 titanium alloy has many prominent merits, such as high intensity, fatigue resistance, corrosion resistance, etc.. It is mainly used for manufacturing the important parts and components of aeroplanes, like compressor disks of turbine engine, vane disks and single vane, etc.. Therefore, to research on the rheological forming of TC11 titanium alloy is significant.Firstly, the current status of the researching on numerical simulation technology in the field of metal forming has been introduced in this paper, and the basic principle of rigid-plastic(visco-plastic)finite element method and its embodiment in bulk forming software of DEFORM 3D has also been introduced.Next, the forming dies and billet have been modeled by UG, and the numerical simulation of the hot rheological forming of the secondary titanium alloy vane disk have been conducted based on DEFORM 3D platform. All the results of numerical simulation, which include the numerical simulation of equivalent strain field, equivalent stress field and temperature distribution, etc., have been analyzed. TC11 titanium is sensitive to forming temperature and strain rate, however, the range of forming temperature is narrow and is bound by heating norm, so the influence of the same forming temperature and various strain rates on the simulation results is compared. Then the metal's flowing law of rheological forming is revealed and the possible underfilled phenomenon is also predicted and analyzed, which possesses certain theoretic guidance and application worthiness to the design of technology and dies, therefore, the converse design of rheological forming become conceivable. The numerical simulation results not only accord with practical producing, but...