A two‐surface damage‐plasticity model based on a Drucker—Prager yield criterion

Zhang, Jian; Brepols, Tim; Reese, Stefanie

doi:10.1002/pamm.202200296

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…During the simulation of the mentioned materials, it is necessary to consider TCA to describe failure realistically by excluding spurious failure in compression. Following a common approach in the literature [5,10], which considers TCA based on the spectral decomposition of the strain tensor, the present study extends the existing gradient-extended two-surface damageplasticity models [2,3,11,12] by considering different damage evolutions in tension and compression.…”

Section: Tension-compression Asymmetry In Damagementioning

confidence: 99%

Numerical implementation of tension–compression asymmetry in a gradient‐extended two‐surface damage–plasticity model

Zhang,

Brepols,

Reese

2023

Proc Appl Math and Mech

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Based on the spectral decomposition of the strain tensor, the tension‐compression asymmetry (TCA) in a gradient‐extended two‐surface damage‐plasticity model is considered in this study. More specifically, the gradient extension is applied in the current model as a suitable damage regularization technique to prevent pathological mesh dependence issues. Furthermore, plasticity and damage are treated as distinct but strongly coupled dissipative mechanisms by using two different types of damage and yield criteria as well as the related loading/unloading conditions, respectively. Finally, a specific material parameter is adopted to control the degree of TCA which results in a unique damage evolution in compression.

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Section: Tension-compression Asymmetry In Damagementioning

confidence: 99%

Numerical implementation of tension–compression asymmetry in a gradient‐extended two‐surface damage–plasticity model

Zhang,

Brepols,

Reese

2023

Proc Appl Math and Mech

Self Cite

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“…For metals [4] and geomaterials [8], onset of plastic yielding is sensitive to hydrostatic pressure. Therefore, the Drucker-Prager yield criterion taking into account the combined hardening law…”

Section: Constitutive Modelingmentioning

confidence: 99%

Characterization of ductile damage and fracture behavior under shear reverse loading conditions

Wei,

Gerke,

Brünig

2023

Proc Appl Math and Mech

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This paper deals with experimental and numerical analysis of the ductile damage and fracture behavior undergoing biaxial non‐proportional shear reverse loading conditions. In the numerical analysis, an anisotropic cyclic plastic‐damage constitutive model is considered to characterize the damage and fracture behavior. Additionally, the change in the hardening rate is observed after shear reverse loading. Thus, a newly modified non‐hardening strain region method is introduced to capture the change in the hardening ratio between isotropic and kinematic hardening. Furthermore, the damage surface is assumed to translate in the direction of the damage strain increment. Hence, a softening law based on the damage strain is proposed. The modified constitutive model predicts macroscopic force‐displacement and microscopic evolution of plastic and damage behaviors under shear reverse loading with a tensile preload. Through digital image correlation technique and scanning electron microscopy, numerical results can be validated by experimental ones. Furthermore, scanning electron microscopy pictures also reveal different damage and fracture mechanisms on the micro‐level.

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“…The stress differential (SD) effect is a widely observed phenomenon in ductile metals [12,42,43] and geomaterials [44]. Additionally, the Bauschinger effect is also noticeable under cyclic loading for ductile metals.…”

Section: Plastic Yield Criterion With Combined Hardeningmentioning

confidence: 99%

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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A two‐surface damage‐plasticity model based on a Drucker—Prager yield criterion

Cited by 5 publications

References 15 publications

Numerical implementation of tension–compression asymmetry in a gradient‐extended two‐surface damage–plasticity model

Numerical implementation of tension–compression asymmetry in a gradient‐extended two‐surface damage–plasticity model

Characterization of ductile damage and fracture behavior under shear reverse loading conditions

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

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