Numerical analysis of non-proportional biaxial reverse experiments with a two-surface anisotropic cyclic plasticity-damage approach

Wei, Zhichao; Gerke, Steffen; Brünig, Michael

doi:10.1016/j.cma.2023.116630

Cited by 7 publications

(2 citation statements)

References 65 publications

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“…The detailed numerical implementation of the proposed material model is discussed in [23], and it has been successfully implemented as a user-defined subroutine in Ansys.…”

Section: Mesh and Boundary Conditionsmentioning

confidence: 99%

“…Moreover, a change in the loading path, such as tension to shear or shear to tension, can significantly change the ductility of the metals. For example, the ductility of the aluminum alloy EN AW 6082-T6 [22,23] and the aluminum alloy 2198 [13,21] reduces under load path change from pre-shear to tension. On the other hand, various preloads (pre-tension, pre-compression, or pre-shear) significantly affect the strain-tofracture behavior under non-proportional loading [18].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Responses of Ductile Aluminum Alloy under Biaxial Non-Proportional Tensile Reverse Loading Patterns

Wei,

Gerke,

Brünig

2023

Metals

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This paper deals with the study of the mechanical responses of ductile metals under biaxial non-proportional cyclic loading tests. The biaxially loaded HC specimens manufactured from 4 mm thick aluminum alloy sheets (EN AW 6082-T6) are subjected to various loading paths, including monotonic and cyclic loading conditions. The aim is to investigate the plastic, damage, and fracture behavior of the material under these different loading scenarios. In terms of numerical aspects, a modified anisotropic two-surface cyclic plastic–damage continuum model is used to predict the material behavior in the load-displacement field and different strain fields. Numerically predicted stress states are analyzed in detail to gain a better understanding of the damage mechanisms. Moreover, the scanning electronic microscopy (SEM) pictures taken from the fracture surfaces confirm the dependency of the damage mechanisms on the loading histories. The present work indicates the importance of considering different loading conditions for the accurate prediction of material responses.

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“…The detailed numerical implementation of the proposed material model is discussed in [23], and it has been successfully implemented as a user-defined subroutine in Ansys.…”

Section: Mesh and Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical Responses of Ductile Aluminum Alloy under Biaxial Non-Proportional Tensile Reverse Loading Patterns

Wei,

Gerke,

Brünig

2023

Metals

Self Cite

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Simulating the onset of damage in DCDC tests using a novel gradient‐extended damage model for tension‐compression asymmetry

Zhang,

Reese

et al. 2024

Proc Appl Math and Mech

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In the present work, an existing framework for gradient‐extended damage is extended to simulate the damage onset in double cleavage drilled compression (DCDC) tests. The main idea is to consider the different evolution of the damage variable under tensile and compressive loading. More specifically, the star‐convex decomposition is exploited to split the strain energy into an active part and an inactive part, and only the active part drives the evolution of the damage variable in the compressive regime. A parameter adopted in the star‐convex decomposition is applied to calibrate the compressive strength independently from the tensile strength, such that the current model can simulate different types of the damage onset. Furthermore, the strengthening effect induced by damage hardening is discussed in this work.

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A nonlinear manifold model order reduction approach for thermo‐mechanically coupled plasticity

Zhang,

Reese

et al. 2024

Proc Appl Math and Mech

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This study employs a nonlinear manifold mode order reduction (MOR) approach to address the high computational cost inherent in multi‐physical nonlinear models, which are discretized by the finite element method (FEM), with a particular focus on thermo‐mechanically coupled plasticity under finite strain conditions. Utilizing nodal snapshots obtained from a full‐order simulation, a projection matrix is constructed through singular value decomposition (SVD), facilitating the construction of a reduced system within a lower‐dimensional space. This reduction process entails the multiplication of the discretized residual vector and stiffness matrix by a linear projection matrix, complemented by the incorporation of a nonlinear projection component to ensure accurate reconstruction within the nonlinear part. Subsequently, a comprehensive three‐dimensional benchmark test is conducted to assess the accuracy and efficacy of the reduced‐order model.

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Numerical analysis of non-proportional biaxial reverse experiments with a two-surface anisotropic cyclic plasticity-damage approach

Cited by 7 publications

References 65 publications

Mechanical Responses of Ductile Aluminum Alloy under Biaxial Non-Proportional Tensile Reverse Loading Patterns

Mechanical Responses of Ductile Aluminum Alloy under Biaxial Non-Proportional Tensile Reverse Loading Patterns

Simulating the onset of damage in DCDC tests using a novel gradient‐extended damage model for tension‐compression asymmetry

A nonlinear manifold model order reduction approach for thermo‐mechanically coupled plasticity

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