Paper Title:
Experimental Investigation on the Residual Stresses Induced by a Plastic Forming Process
  Abstract

The extrusion of a space frame must be followed by forming operations of some kind to obtain the desired shape/curvature, for example a stretch bending process. Therefore, one has to face with problems as production tolerances and cross-sectional distortions of the curved product. In house experience combined with trial–and–error procedures have been traditionally used to cope with the said problems. Aircraft frames show significant residual stresses as a consequence of plastic forming processes. A great number of variables, such as initial frame length and/or final additional stretch, can influence the stress state of frames determining their life and efficiency under operating loading conditions. In the present paper, we refer about the experimental evaluations of the residual stress state of aircraft frames which have carried out taking into account different process parameters. The experimental results obtained and discussed show some interesting trends: they demonstrate that the residual stresses of the formed component can be controlled and reduced.

  Info
Periodical
Key Engineering Materials (Volumes 452-453)
Edited by
A. Saimoto and M.H. Aliabadi
Pages
821-824
DOI
10.4028/www.scientific.net/KEM.452-453.821
Citation
G. Lamanna, L. Grassia, V. Ascione, "Experimental Investigation on the Residual Stresses Induced by a Plastic Forming Process", Key Engineering Materials, Vols. 452-453, pp. 821-824, 2011
Online since
November 2010
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Price
$32.00
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