Numerical Simulation On Stamping Forming Process Of Titanium Alloy Ring Shell

In the research field of new materials,as well as the design, research and develop of new materials, key technology such as special forming, surface dealing, material property testing, lifetime forecasting and invaliding analyses need to be studied. The FEM and numerical simulation are used to explore the internal characteristic and evolving pattern of manufacturing, forming and the other processing at different levels, which have been important methods for the research of materials science.Titanimu(Ti) alloy is widely used in aerospace industry because of its excellent properties. Ti alloy ring shell container serves for the fuel storage of space vehicle, which is used in some severe rugged environment and demanded of high requirement of forming quality. There are a lot of forming difficulties during the manufacturing because the Ti alloy is costly and hard to deform. These roblems are studied in the dissertation with computer numerical simulation combining with theoretical analysis. The main results are illustrated as follows:(1) The stress-strain curves of TC4 Ti alloy at different temperature are obtained using experimental method.(2) The forming process of Ti alloy is studied, and the FEM model of elasticity plasticity fit for the practical forming process is established. The key technology in the simulation is provided.(3) The strain and stress under different deformation stage are analyzed and the common forming law of this ring shell container is obtained using the FEM simulation method. The results show that the nodes in the inner edge of the blank have the maximum strain and stress values, in which the tearing failure will take place most likely.