Title: Designing preform using FEM and response surface method to optimise strain distribution in forging of turbine blade

Authors: Seyed Hamidreza Torabi; Amir Amiri; Mohammadhossein Sadeghi; Babak Barooghi Bonab

Addresses: School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran ' Tarbiat modares university, Tehran, Iran ' Mechanical Engineering Department, Tarbiat Modares University, Tehran, Iran ' Mechanical Engineering Department, Shahid Rajaee University, Tehran, Iran

Abstract: Forging is one of the production methods of turbine blades. But because of the complexities of the blades, they cannot be produced in one stage and it is necessary to perform preform. In this paper, an extruded elliptical cross section was considered as blade preform, then response surface method (RSM) was applied to optimise this preform. The maximum filling ratio of final die and the minimum strain variance of final blade were considered as objective of optimisation. Design expert software was used for design of experiment and optimisation, also Deform-3D software was applied to simulate the forging process. The optimised preform was compared with the preform resulted from conventional preform designing method.

Keywords: forging; turbine blades; preform optimisation; response surface methodology; RSM; preform design; FEM; finite element method; strain distribution; design of experiments; DOE; simulation.

DOI: 10.1504/IJMMS.2014.067167

International Journal of Mechatronics and Manufacturing Systems, 2014 Vol.7 No.4/5/6, pp.265 - 278

Received: 15 Nov 2013
Accepted: 01 May 2014

Published online: 07 Feb 2015 *

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