On the identifiability of Hill‐1948 plasticity model with a single biaxial test on very thin sheet. (29th June 2017)

• Record Type: Journal Article
• Authors: Bertin, Morgan; Hild, François; Roux, Stéphane
• Other Names: Grédiac Michel guestEditor.; Pierron Fabrice guestEditor.
• Is Part Of: Strain. Volume 53:Number 5(2017:Oct.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-06-29
• Subjects: anisotropy -- digital image correlation (DIC) -- full field measurements -- plasticity; Strains and stresses -- Measurement -- Periodicals; 624.176
• DOI: 10.1111/str.12233
• Languages: English
• ISSNs: 0039-2103

Abstract

Abstract: One biaxial experiment is performed on an ultrathin specimen made of 17‐7 precipitation hardened stainless steel. An antiwrinkling setup allows for the characterization of the mechanical behavior with integrated digital image correlation. 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.