RESIDUAL STRESS ANALYSIS BY CONTOUR METHOD ONTO COLD EXPANDED HOLE ASSEMBLY– COMPARISON WITH FEA
Author: Vincent DELAGE 1, Jean-Michel DUCHAZEAUBENEIX 1, Laurence BESNAULT 1 1 Meliad, www.Meliad-sas.com, 6, rue des Orfèvres 44840 Les Sorinières, France v.delage@Meliad-sas.com, jm.duchazeaubeneix@Meliad-sas.com, l.besnault@Meliadsas. com
Source: ICSP14 Milan
Doc ID: 2022102
Year of Publication: 2022
Abstract:
1 Abstract
Introducing high residual stress in a hole is critical for many fatigue life components, especially
in aerospace industry. The process introduces deep residual stress on hole surface providing
fatigue life enhancement.
Cold expansion should be controlled to guaranty both the homogeneity and the repeatability
of the compressive stresses generated by the process. However, it is difficult to control the
stresses generated into the component with usual residual stresses measurement methods.
This is why Meliad and Capaero with Mat-In-Meca developed the contour method allowing to
control the deep stress profile generated in the part.
This study shows how experimental measurement by the contour method and numerical
model through finite element analysis gives effective characterization of the residual stresses
introduced after hole expansion.
Material: 35NCD13 Steel
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