Journal
MEASUREMENT
Volume 187, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2021.110301
Keywords
DIC; Global DIC; Milling; Residual stresses; Metal chips
Funding
- French National Research Agency (ANR) [ANR-15-CE10-0005-01]
- Agence Nationale de la Recherche of the French government through the program Investissements d'Avenir [16-IDEX-0001 CAP 20-25]
- Agence Nationale de la Recherche (ANR) [ANR-15-CE10-0005] Funding Source: Agence Nationale de la Recherche (ANR)
Ask authors/readers for more resources
This article explores a reliable experimental technique for measuring in-plane deformation of large aeronautical parts during machining, utilizing Digital Image Correlation (DIC) for contactless measurement. The study reveals the issue of part deformation caused by residual stresses during machining, which requires specific methods for control and accurate measurements.
In the context of the aeronautics industry, aluminum alloy structural parts are manufactured in several stages, from forming processes and heat treatments to final machining. Some process steps may generate residual stresses. Thus, material removal during machining releases these residual stresses, which induces part deformation. Such deformations can lead to geometric nonconformity of the machined part. It is therefore essential to control this phenomenon. Due to the variability in residual stress distribution in each raw part, the modeling approaches must to be coupled with experimental measurements. This article thus aims to define a reliable experimental technique for measuring in-plane deformation of large aeronautical parts during their machining. The backbone of the technique relies on Digital Image Correlation (DIC), which enables the contactless measurement of part deformation during machining. Moreover, DIC provides a full-field measurement and a direct evaluation of part deformations. This work discusses more specifically problems related to the use of DIC during machining, the latter corresponding to a particularly harsh environment. Indeed, optical systems undergo undesirable movement and metal chips hide areas of the observed part. These unwanted events corrupt the results. In order to control these problems and consistently apply DIC part deformation measurement during machining, specific methods are proposed in this paper. Finally, DIC measurements are performed during the same machining sequence of two parts. The excellent agreement of the two measurements confirms the reliability of the technique. Finally, measurements are discussed, emphasizing the contribution they provide to the machining community.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available