14th International Conference on Shot Peening

Shot Peening Characterization Using Gelsight 3d Measurement

Vincent DELAGE, Jean-Michel DUCHAZEAUBENEIX, Laurence BESNAULT

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@meliad-sas.com

Introduction

Introducing high residual stress in a hole is critical for many fatigue life components, especially in aerospace industry. The split sleeve cold expansion 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. X-ray diffraction and hole drilling method are not able to measure the area of interest with such process.

Objectives

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.