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Numerical evaluation of residual stress induced by reaming of aluminium 2024-T351

Abstract : In aircraft assemblies, holes for fastening are critical areas from where fatigue damage can be initiated, especially for metal parts. Depending on the operating conditions of the various stages of the machining process of the hole (drilling, reaming, cold expansion , second reaming), the manufacturers observe significantly different fatigue strength of the structures. To optimize the behavior of the aircraft assemblies, the manufacturers want to understand the impact of the whole machining process of the hole on the material characteristics of the part. They investigate particularly the residual stress state in the hole edge zone which can be significantly different depending on the operating conditions. The study, in collaboration with Airbus, focuses specifically on the impact of the reaming on the final residual stress state in parts with initial material state not clean of mechanical stress. Indeed, before the final reaming, the parts undergo at least a drilling operation, and sometimes a cold expansion operation. Therefore, they do not present a zero stress state. This paper investigates the influence of reaming in an aluminum 2024-T351 part which has been pre-stressed by the cold expansion process. Both processes are simulated using a finite element model with Abaqus. The implemented strategy to simulate the reaming process is based on the progressive deactivation of mesh elements. The obtained results show a low relaxation of the circumferential and radial residual stresses in the part during the reaming simulation.
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Contributor : Alexandra Lacombe <>
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  • HAL Id : hal-02127580, version 1


Alexandra Lacombe, Yann Landon, Manuel Paredes, Clément Chirol, Audrey Benaben. Numerical evaluation of residual stress induced by reaming of aluminium 2024-T351. International Joint Conference on Mechanics, Design Engineering and Advanced Manufacturing, Jun 2018, Cartagena, Spain. ⟨hal-02127580⟩



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