Title: Comparison of the ductile damage models for fracture prediction of the incremental sheet forming

Authors: Le Van Sy

Addresses: PetroVietnam College (PV College), PetroVietnam University (PVU), 120 Tran Phu, Ward 5, Vung Tau City, Vietnam

Abstract: Incremental sheet forming is a modern forming process, which is suitable for fabricating unique product or small production batches. This paper focuses on prediction of mechanical damages occurring in ISF process with magnesium sheet at elevated temperature by using FEM simulation in Abaqus/explicit with four ductile damage models. The practical experiments with different tensile specimens have been conducted to calibrate the ductile damage models. By using a combination of mechanical test approach and FEM simulation, the stress triaxiality and fracture strain are identified, which helps find out the locus of ductile damage for each model. The simulated results are verified to those conducted in real experiment in terms of the type of mechanical failures and fracture location the simulated results show that CrachFEM and modified Mohr-Coulomb models can be used for predicting the ductile damage occurring in the SPIF process with magnesium sheet at elevated temperature.

Keywords: constitutive equation; damage model; FEM simulation; incremental sheet forming; ISF; magnesium sheet; AZ31; ductile damage; damage criteria; Abaqus; SPIF.

DOI: 10.1504/IJMATEI.2025.147591

International Journal of Materials Engineering Innovation, 2025 Vol.16 No.3, pp.214 - 231

Received: 14 May 2023
Accepted: 26 Aug 2023
Published online: 24 Jul 2025 *

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