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

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

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.

• Jezik: Angleški jezik
• Ključne besede: anisotropy, digital image correlation, finite element model updating, material characterization
• Tipologija: 1.08 - Objavljeni znanstveni prispevek na konferenci
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: 8 str.
• Številčenje: Vol. 1049
• PID: 20.500.12556/RUL-182258
• UDK: 621.7:004.9
• ISSN pri članku: 1662-9795
• DOI: 10.4028/p-jZ5Rxd
• COBISS.SI-ID: 277073411
• Datum objave v RUL: 05.05.2026

Gradivo je del revije

• Naslov: Key engineering materials
• Skrajšan naslov: Key eng. mater.
• Založnik: Trans Tech Publications
• ISSN: 1662-9795
• COBISS.SI-ID: 13565723

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: anizotropija, korelacija digitalnih slik, metoda posodabljanja modela končnih elementov, materialna karakterizacija, MT2.0