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Article Dans Une Revue Tribology Letters Année : 2023

In Situ Friction Coefficient Measurement of Complex Contact Configuration from Dialog Between Digital Image Correlation and Numerical Modeling

Résumé

We present a non-intrusive in situ measuring method to obtain the mean coefficient of friction (COF) in a common edge contact of complex shape. The significance of COF on computed contact stresses, and thus on predicted lifetime compels us to develop an accurate derivation method. A dovetail specimen, accounting for the blade/disk interface of gas turbine engines, is subjected to static uniaxial tension, and displacements fields are measured on the lateral face, near contact, with Digital Image Correlation. A Finite Element Method Updating identification is employed to identify the mean COF at any loading cycle operating within the full-slip regime. The numerical model is first validated through a series of virtual tests. Application to a Low-Cycle Fatigue test shows an increase of the COF with the number of cycles. The study also brings to light the high sensibility of the specimen to geometrical positioning.\GRAPHIACAL ABSTRACT\
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Dates et versions

hal-04661823 , version 1 (25-07-2024)

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Alexis Hingue, Thibaut Chaise, Philippe Chaudet, Bruno Damiens, Daniel Nélias. In Situ Friction Coefficient Measurement of Complex Contact Configuration from Dialog Between Digital Image Correlation and Numerical Modeling. Tribology Letters, 2023, 71 (3), ⟨10.1007/s11249-023-01767-8⟩. ⟨hal-04661823⟩
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