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Article Dans Une Revue Strain Année : 2017

On the identifiability of Hill-1948 plasticity model with a single biaxial test on very thin sheet

Morgan Bertin
François Hild

Résumé

One biaxial experiment is performed on an ultra-thin specimen made of 17-7 precipitation hardened stainless steel. An anti-wrinkling setup allows for the characterization of the mechanical behavior with Integrated Digital Image Correlation (IDIC). A sensitivity analysis assesses the amount of data available but reveals a discrepancy between observation and model that is interpreted as the occurrence of wrinkling in a confined boundary layer. From this observation, the identification is performed on a refined region of interest where reliable data are accessible. The calibration of parameters of various constitutive equations is performed. In particular, the identifiability of the so-called Hill-1948 model is analyzed.
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Dates et versions

hal-01674577 , version 1 (03-01-2018)

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Morgan Bertin, François Hild, Stéphane Roux. On the identifiability of Hill-1948 plasticity model with a single biaxial test on very thin sheet. Strain, 2017, 53 (5), pp.e12233. ⟨10.1111/str.12233⟩. ⟨hal-01674577⟩
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