Paper Title:

Finite Element Simulation on Superplastic Forming of Outer Jacket of Combustion Chamber

Periodical Key Engineering Materials (Volume 433)
Main Theme Superplasticity in Advanced Materials - ICSAM 2009
Edited by Daniel G. Sanders
Pages 219-224
DOI 10.4028/www.scientific.net/KEM.433.219
Citation Jong Hoon Yoon et al., 2010, Key Engineering Materials, 433, 219
Online since March, 2010
Authors Jong Hoon Yoon, Yeong Moo Yi, Ho Sung Lee
Keywords Combustion Chamber, Concave Forming, Convex Forming, Finite Element (FE), Mould Configuration, Outer Jacket, Simulation, Super Plastic Forming (SPF)
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Abstract

In this paper, mould configurations are studied by finite element simulation for superplastic blow forming of combustion chamber outer jacket. One concave and two convex mould configurations are basically considered to determine which type would be advantageous in terms of forming time and thickness distribution. For the simulation, the flow stress equation of duplex stainless steel was determined from free bulging test. The simulation results showed that the concave type was quit a bit different from the other two cases. The concave mould configuration produced shorter forming time and thicker thickness distribution than the others, and it seems to be more effective for superplastic forming of outer jacket. The obtained pressure profile for the concave mould configuration was employed in actual forming and the thickness distribution was compared for the verification.