Characterising Through-Thickness Shear Anisotropy Using the Double-Bridge Shear Test and Finite Element Model Updating DOI Open Access
Bojan Starman, Bin Chen, Andraž Maček

и другие.

Materials, Год журнала: 2025, Номер 18(10), С. 2220 - 2220

Опубликована: Май 11, 2025

The accuracy of numerical predictions in sheet metal processes involving multiaxial stress-strain states (e.g., blanking, riveting, and incremental forming) heavily depends on the characterisation plastic anisotropy under loading conditions. A fully calibrated 3D model is essential for this purpose. While in-plane material behaviour can be conventionally characterised through uniaxial equi-biaxial tensile tests, calibrating out-of-plane remains a significant challenge. This behaviour, governed by shear stress associated parameters, typically described yielding. These parameters are notoriously difficult to determine, leading researchers frequently assume isotropic or identical responses. Although advanced calibrations may utilise crystal plasticity modelling, there critical need macro-mechanical methods. paper presents an testing procedure based full-field strain measurements using digital image correlation (DIC). Strains within zone measured via DIC employed Finite Element Model Updating (FEMU) identify 2.42 mm thick, cold-rolled AW5754-H22 aluminium alloy sheet, Yld2004-18p yield criterion. Given that characteristic response at scale influenced local structure surface, evaluates feasibility such measurements. Finally, test validity full-field-based approach, FEMU-identified compared against results obtained classical optimisation force-elongation from zone.

Язык: Английский

Characterising Through-Thickness Shear Anisotropy Using the Double-Bridge Shear Test and Finite Element Model Updating DOI Open Access
Bojan Starman, Bin Chen, Andraž Maček

и другие.

Materials, Год журнала: 2025, Номер 18(10), С. 2220 - 2220

Опубликована: Май 11, 2025

The accuracy of numerical predictions in sheet metal processes involving multiaxial stress-strain states (e.g., blanking, riveting, and incremental forming) heavily depends on the characterisation plastic anisotropy under loading conditions. A fully calibrated 3D model is essential for this purpose. While in-plane material behaviour can be conventionally characterised through uniaxial equi-biaxial tensile tests, calibrating out-of-plane remains a significant challenge. This behaviour, governed by shear stress associated parameters, typically described yielding. These parameters are notoriously difficult to determine, leading researchers frequently assume isotropic or identical responses. Although advanced calibrations may utilise crystal plasticity modelling, there critical need macro-mechanical methods. paper presents an testing procedure based full-field strain measurements using digital image correlation (DIC). Strains within zone measured via DIC employed Finite Element Model Updating (FEMU) identify 2.42 mm thick, cold-rolled AW5754-H22 aluminium alloy sheet, Yld2004-18p yield criterion. Given that characteristic response at scale influenced local structure surface, evaluates feasibility such measurements. Finally, test validity full-field-based approach, FEMU-identified compared against results obtained classical optimisation force-elongation from zone.

Язык: Английский

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