ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Analysis of the forging of gas turbine rotor blades is a complex operation because of thecomplicated three-dimensional geometry and the non-steady state contact between the workpieceand the die surface. As a result, the simulation of blade forging performed so far has been restrictedto two-dimensional plane-strain problems or simplified three-dimensional deformational casesthroughout which some simplifications and assumptions are employed. In this paper athree-dimensional analysis of the non-isothermal multi-stage forging process of a gas turbine rotorblade from a cylindrical billet to a complicated product is presented, using 3D rigid-viscoplasticFEM. The simulation results of the blade forging processes are summarized in terms of deformedconfigurations, the material flow net pattern of typical cross-sections, the distribution of differentfield variables such as strain and stress, and the load-stroke relationships for each operational stage,in this way the forming laws during forging process of a gas turbine rotor blade being revealed. Thevalidity of simulation results has been verified through comparisons with forging tests, which showgood agreements with numerical simulation results. The simulation results may be effectivelyapplied to other types of three-dimensional turbine blade forging processes
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.733.pdf
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