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Développement d'un modèle numérique sur l'étude de l'intégrité des surfaces en perçage

Abstract : The surface integrity has a significant impact on the fatigue life of the machined parts. New requirements appear from manufacturers and especially from aeronautical industrialists. Drilling holes are critical and can damage the component. Nevertheless, residual stresses are not studied a lot in drilling processes. The residual stresses created are a result of multiphysical phenomena during drilling processes. It is difficult to identify them due to the confinement of the hole. In the current study, experimental tests are realized and numerical model of drilling surface integrity was developed. First, experimental works were performed in several lubrication conditions to understand physical phenomena which lead to residual stresses in the drilled workpiece. The numerical developments are set-up about two sections. The first numerical model represents the drilling operation. The state of the art and an initial study were shown that the actual numerical models are not able to simulate a drilling operation in an important drilling depth. So the first numerical model gives an estimation of loads induced by the drilling operation and necessary to compute residual stresses. Finally, the second numerical model simulates residual stresses in a drilled part taking in account loads provided.
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https://tel.archives-ouvertes.fr/tel-01745720
Contributor : Mathieu Girinon <>
Submitted on : Wednesday, March 28, 2018 - 2:51:02 PM
Last modification on : Wednesday, November 20, 2019 - 2:26:49 AM
Long-term archiving on: : Thursday, September 13, 2018 - 10:58:48 AM

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  • HAL Id : tel-01745720, version 1

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Mathieu Girinon. Développement d'un modèle numérique sur l'étude de l'intégrité des surfaces en perçage. Mécanique des matériaux [physics.class-ph]. Université de Lyon; Ecole centrale de Lyon; Ecole nationale d'Ingénieurs de Saint-Etienne, 2017. Français. ⟨tel-01745720⟩

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