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Pré-Publication, Document De Travail Année : 2023

Wedge indentation of elastoplastic solids — from single indentation to interaction between indenters

Résumé

Performance of metallic seals used between face-turned surfaces is related to their abilities to flow plastically in order to fill up cavities between wedge-shaped asperities. Double wedge indentation is therefore a simple way to investigate what happens at such a seal-flange interface. In this paper, finite element analyses of single and double wedge indentations are conducted. A particular attention is paid to the effects of hardening parameters on the resulting hardness. First, it is observed that single wedge indentation hardness can be well-approximated by the adaptation of analytic models initially developed for cone indentation problems. Second, it is shown that interaction between indentation-strain field during double wedge indentation starts once the bearing ratio is about 25%. It leads to a significant mean contact pressure increase, which is strongly dependent upon the strain hardening exponent. Eventually, for a bearing ratio higher than 75%, a plastic locking stage occurs, which leads to an exponential increase of the mean contact pressure. Practical applications of this work to indentation and sealing research fields are discussed.
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Dates et versions

hal-03517125 , version 1 (07-01-2022)
hal-03517125 , version 2 (28-07-2022)
hal-03517125 , version 3 (30-12-2022)
hal-03517125 , version 4 (06-02-2023)
hal-03517125 , version 5 (19-04-2023)
hal-03517125 , version 6 (25-04-2023)

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  • HAL Id : hal-03517125 , version 6

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Yvan Marthouret, Tony Zaouter, Florent Ledrappier, Guillaume Kermouche. Wedge indentation of elastoplastic solids — from single indentation to interaction between indenters. 2023. ⟨hal-03517125v6⟩
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