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PL2: "Contributions of 4D imaging in mechanics of materials" François Hild (ENS Paris-Saclay)
Time:
Tuesday, 19/Mar/2024:
11:00am - 12:00pm
Session Chair: Stefan Hartmann
Location:G26/H1
Lecture Hall 1 in Building 26; size: 572
Presentations
Contributions of 4D imaging in mechanics of materials
F. Hild
LMPS / ENS Paris-Saclay
3D imaging (e.g., via x-ray tomography) has become popular for analyzing material microstructures and quantifying their temporal changes. When time lapse series of 3D pictures are acquired during a single experiment, it is possible to measure displacement fields via digital volume correlation (DVC), thereby leading to 4D results. Such 4D analyses have been performed for more than one decade in the field of mechanics of materials.
The presentation aims at reviewing the achievements of and challenges faced by such measurement technique. A general and unified DVC framework is introduced and its extension to 4D spacetime registrations is discussed. The analysis of in-situ experiments illustrates how mechanically relevant parameters are extracted and how models may be validated. The current challenges are examined and some propositions are given to address them.
