A new anisotropic-asymmetric yield criterion covering wider stress states in sheet metal forming

Y Hou, J Min, A Abd El-Aty, HN Han, MG Lee - International Journal of …, 2023 - Elsevier
The stress state-dependent plastic anisotropy of sheet metals has drawn significant
attention. Nevertheless, existing phenomenological plasticity models limitedly capture the …

[HTML][HTML] Plastic anisotropy of sheet metals under plane strain loading: A novel non-associated constitutive model based on fourth-order polynomial functions

Y Hou, K Du, A Abd El-Aty, MG Lee, J Min - Materials & Design, 2022 - Elsevier
Constitutive modeling of sheet metals under plane strain state is important but challenging.
Recent studies report that the yield strength and plastic strain rate of sheet metals in the …

Plastic anisotropy evolution of SS316L and modeling for novel cruciform specimen

EM Mamros, SM Mayer, DK Banerjee… - International Journal of …, 2022 - Elsevier
In this paper, the evolution of the plastic anisotropy of stainless steel 316L samples is
investigated under proportional loading paths using a customized cruciform specimen. The …

Comparison of anisotropic yield functions and calibrations for accurate thickness prediction in hole expansion test

HS Park, F Barlat, SY Lee - Journal of Materials Processing Technology, 2023 - Elsevier
The hole expansion test is an appropriate evaluation method for assessing the formability of
automotive parts, where fracture prediction using simulated localized thickness is crucial …

Reforming toolpath effect on deformation mechanics in double-sided incremental forming

S Darzi, BL Kinsey, J Ha - International Journal of Mechanical Sciences, 2024 - Elsevier
Incremental sheet metal forming is a die-less process known for its high flexibility, making it
a suitable choice for fabricating low-batch, highly customized complex parts. In this paper …

Effect of plastic anisotropy and Portevin-Le Chatelier bands on hole-expansion in AA7075 sheets in-T6 and-W tempers

Y Choi, J Ha, MG Lee, YP Korkolis - Journal of Materials Processing …, 2021 - Elsevier
Influence of tempers on the hole-expansion formability of an AA7075 aluminum sheet is
investigated for-T6 (as-received) and-W tempers (super saturated by the solution heat …

[HTML][HTML] Breaking through the plasticity modeling limit in plane strain and shear loadings of sheet metals by a novel additive-coupled analytical yield criterion

K Du, J Cui, Y Hou, Y Ren, J You, L Ying, X Li… - Journal of Materials …, 2024 - Elsevier
The automotive industry increasingly relies on numerical simulations to predict the geometry
and forming processes of complex curved parts. Accurate yield stress functions that cover a …

Flange wrinkling in deep-drawing: Experiments, simulations and a reduced-order model

K Chen, AJ Carter, YP Korkolis - Journal of Manufacturing and Materials …, 2022 - mdpi.com
Flange wrinkling is often seen in deep-drawing process when the applied blankholding
force is too small. This paper investigates the plastic wrinkling of flange under a constant …

Martensitic transformation of SS304 truncated square pyramid manufactured by single point incremental forming

EM Mamros, F Maaß, AE Tekkaya, BL Kinsey… - CIRP Journal of …, 2024 - Elsevier
To investigate the microstructural changes that occur in stainless steel (SS) 304 during
single point incremental forming (SPIF), experiments and finite element (FE) simulations …

Observation of Portevin-le Chatelier effect in aluminum alloy 7075-w under a heterogeneous stress field

Y Choi, J Ha, MG Lee, YP Korkolis - Scripta Materialia, 2021 - Elsevier
Abstract The kinetics of Portevin-Le Chatelier (PLC) bands in the hole-expansion of a
circular hole using a flat-headed punch are investigated for a solid-solution heat-treated …