CE06 - Polymères, composites, physico-chimie de la matière molle

Effect of Complex Loading histories on the Onset of Sliding of ElastomeR contacts (CLOSER) – CLOSER

Submission summary

Contacts involving elastomers combine strong friction and strong adhesion, two hysteretic effects making their sliding transition very dependent on the loading history. The monotonic and unidirectional loadings conditions generally used to characterize friction of elastomers are therefore not sufficiently representative of applications (tires, seals, haptic devices), where loadings conditions are very complex (multiaxial, vibratory). In CLOSER, a consortium of experimenters and modelers will reach a complete understanding of the elementary mechanisms at the origin of the resistance to friction of elastomeric contacts under arbitrarily complex loading histories. To achieve this ambitious goal, our strategy will rely on a new, worldclass experimental equipment enabling measurement of the local deformations along soft contact interfaces, when submitted to unprecedentedly complex multi-directional loadings. Those measurements will be used to challenge the state-of-the-art models of the onset of sliding of elastomer contacts, recently developed in the consortium, and accounting simultaneously, for the first time at the local scale, for friction, adhesion and elastic non-linearities of elastomers. The final deliverable of the project will be a modelling tool able to match quantitatively the experimental results, and thus to provide reliable predictions in any new contact situation. Such predictions will be a decisive new asset to optimize the design of elastomer-based tools in a broad range of applications.

Project coordinator

Monsieur Davy Dalmas (Ecole Centrale de Lyon)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

LTDS Ecole Centrale de Lyon
LTDS Ecole Centrale de Lyon

Help of the ANR 393,253 euros
Beginning and duration of the scientific project: March 2023 - 48 Months

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