Towards single-test anisotropy calibration : sensitivity, identifiability and validation of YLD2000-2d

Starman, Bojan (author), Maček, Andraž (author), Halilovič, Miroslav (author), Lava, Pascal (author), Pierron, Fabrice (author), Coppieters, Sam (author)

This paper revisits the long-standing question of how to fully characterise the in-plane plastic anisotropy of sheet metals without assembling evidence from multiple standardised tests. The central idea is pragmatic: a single, well-designed heterogeneous biaxial experiment can replace the conventional combination of uniaxial and equibiaxial tests if the specimen and the inverse identification method are co-designed to (i) activate informative stress states and (ii) maintain low strain gradients for accurate digital image correlation measurements. The proposed cruciform specimen is deliberately conceived as a benchmark configuration for full-field inverse identification, with known locations and stress-strain states at which relevant material information is embedded. The approach is coupled with a Finite Element Model Updating framework, enabling all anisotropy parameters of the YLD2000-2d model to be identified from a single full-field dataset. Sensitivity and identifiability analyses demonstrate that a physically based parameter formulation significantly improves the conditioning of the inverse problem. Virtual experimentation confirms the robustness and accuracy of the proposed “one-test” identification strategy.

• Language: English
• Keywords: anisotropy, digital image correlation, finite element model updating, material characterization
• Typology: 1.08 - Published Scientific Conference Contribution
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2026
• Number of pages: 8 str.
• Numbering: Vol. 1049
• PID: 20.500.12556/RUL-182258
• UDC: 621.7:004.9
• ISSN on article: 1662-9795
• DOI: 10.4028/p-jZ5Rxd
• COBISS.SI-ID: 277073411
• Publication date in RUL: 05.05.2026

Record is a part of a journal

• Title: Key engineering materials
• Shortened title: Key eng. mater.
• Publisher: Trans Tech Publications
• ISSN: 1662-9795
• COBISS.SI-ID: 13565723

Secondary language

• Language: Slovenian
• Keywords: anizotropija, korelacija digitalnih slik, metoda posodabljanja modela končnih elementov, materialna karakterizacija, MT2.0