Simple shear methodology for local structure–property relationships of sheet metals: State-of-the-art and open issues

G Han, J He, S Li, Z Lin - Progress in Materials Science, 2024 - Elsevier
Simple shear presents a local material structure–property relationship and plays an
important role in the development of material design, mechanical modeling, and …

A review of characterization and modelling approaches for sheet metal forming of lightweight metallic materials

Y Hou, D Myung, JK Park, J Min, HR Lee, AA El-Aty… - Materials, 2023 - mdpi.com
Lightweight sheet metals are attractive for aerospace and automotive applications due to
their exceptional properties, such as low density and high strength. Sheet metal forming …

A general yield function with differential and anisotropic hardening for strength modelling under various stress states with non-associated flow rule

Y Lou, C Zhang, S Zhang, JW Yoon - International Journal of Plasticity, 2022 - Elsevier
Sheet metal experiences various stress states during plastic deformation, including uniaxial
compression, shear, uniaxial, plane strain and equibiaxial tension, but the existing yield …

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 …

Lode-dependent anisotropic-asymmetric yield function for isotropic and anisotropic hardening of pressure-insensitive materials. Part I: Quadratic function under non …

Y Lou, JW Yoon - International Journal of Plasticity, 2023 - Elsevier
It is challenging to precisely model the complicated plastic deformation of metals, including
anisotropy in strength and plastic deformation, strength differential effect, anisotropic …

A generalized, computationally versatile plasticity model framework-Part I: Theory and verification focusing on tension‒compression asymmetry

Y Hou, K Du, J Min, HR Lee, Y Lou, N Park… - International Journal of …, 2023 - Elsevier
Microstructural characteristics and complex loading conditions in the deformation of metallic
materials lead to complexity in mechanical responses. In this study, we propose a …

Characterization and modelling of evolving plasticity behaviour up to fracture for FCC and BCC metals

C Zhang, Y Lou - Journal of Materials Processing Technology, 2023 - Elsevier
Yield surfaces evolve depending on loading directions (anisotropic hardening) and stress
states (differential hardening) during plastic deformation of sheet metals. A new analytical …

Modeling stress anisotropy, strength differential, and anisotropic hardening by coupling quadratic and stress-invariant-based yield functions under non-associated …

Y Hou, J Min, J Lin, MG Lee - Mechanics of Materials, 2022 - Elsevier
An accurate description of yield surface is essential for the high-fidelity numerical analyses
of sheet metal forming processes. In this work, a simple coupling of anisotropic quadratic …

Analytical description of an asymmetric yield function (Yoon2014) by considering anisotropic hardening under non-associated flow rule

Q Hu, JW Yoon - International Journal of Plasticity, 2021 - Elsevier
A simple analytical form for yield surface distortion under non-associated flow rule is
developed from the expression of the transformed second and third deviatoric stress …

A non-quadratic pressure-sensitive constitutive model under non-associated flow rule with anisotropic hardening: Modeling and validation

Y Hou, J Min, TB Stoughton, J Lin, JE Carsley… - International Journal of …, 2020 - Elsevier
A non-associated flow rule (non-AFR) constitutive model is proposed to describe the
evolving yield stress and plastic potential surfaces of sheet metal under plane stress …