Generation of 3D representative volume elements for heterogeneous materials: A review

Bargmann, Swantje; Klusemann, Benjamin; Markmann, Jürgen; Schnabel, Jan Eike; Schneider, Konrad; Soyarslan, Celal; Wilmers, Jana

doi:10.1016/j.pmatsci.2018.02.003

Cited by 406 publications

(156 citation statements)

References 506 publications

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“…However, the results also prove that not only interface area plays a significant role in the actuation behaviour but also geometrical factors such as pore channel diameters, where larger diameters reduce the specific interface area but improve ion transport and electric field distribution. From this point of view, hierarchical nanoporous structures [21,22,45] seem especially promising.…”

Section: Discussionmentioning

confidence: 99%

Functionalisation of metal–polymer-nanocomposites: Chemoelectromechanical coupling and charge carrier transport

Wilmers

Bargmann

2018

Extreme Mechanics Letters

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a b s t r a c tElectrochemical actuation in nanoporous metals is achieved by impregnation of the material's pore space with a ionic conductor, typically an aqueous electrolyte. These hybrid actuators exhibit fully reversible deformation and mechanical properties that can be controlled by electric signals. Recently, set-ups have been proposed in which the nanoporous metal's surface is additionally coated with a conjugated polymer, resulting in a nanocomposite that exhibits strongly increased actuation strains compared to the pure metal while still retaining the mechanical strength of the metal backbone.In order to exploit the full potential of these nanocomposite actuators, a detailed understanding of the underlying ion transport mechanisms and means to predict the actuator's response are necessary. We present an interface-extended continuum mechanical model to study actuation in pure nanoporous gold and nanoporous gold-polypyrrole nanocomposites. Simulations predict significantly enhanced actuation strains due to the presence of the polymer phase and show that both, the nanocomposite's structure and the ions' mobilities, greatly affect the actuator's response.

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Section: Discussionmentioning

confidence: 99%

Functionalisation of metal–polymer-nanocomposites: Chemoelectromechanical coupling and charge carrier transport

Wilmers

Bargmann

2018

Extreme Mechanics Letters

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“…Most publications modeled the deformation behavior of DP steel under uniaxial tensile loading . However, the construction of a 3D RVE model is difficult and complex . So, the sheet specimen was generally considered to be under plane stress or plane strain state for 2D RVE model, which is not quite accurate.…”

Section: Introductionmentioning

confidence: 99%

Microstructure‐Based Modeling of Mechanical Properties and Deformation Behavior of DP600 Dual Phase Steel

Guo

Hao

et al. 2019

steel research int.

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Herein, the modeling approach for predicting the work hardening flow curve of DP600 steels from the real microstructure and comparison between micromechanical modeling and experimental shear loading are described. A real microstructure-based model by representative volume element (RVE) method is used to evaluate the microstructure deformation. The flow behavior of ferrite and martensite single phase is predicted by a dislocation-based model. Results show that the work hardening predicted by the simulation under shear loading condition is consistent with the experimental data. An increased carbon in ferrite phase can increase the strength and strain hardening rate of a given steel. Simulation indicates that the strain is mainly concentrated in the ferrite, and the plastic strain localization is mainly located at the ferrite grains along the phase boundaries; martensite carries most of the stress. The distribution and morphology of martensite affect the deformation behavior of dual phase (DP) steel. A predominant shear failure mode is developed and instability occurs under uniaxial loading.

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“…The experimental mechanics-based approach adopted in this study for verifying the RVE concept is very general, while the technical literature usually focuses on determining the proper homogenization scheme as well as on the RVE shape and size to be used in specific homogenization-based computations on heterogeneous materials such as, for example, composite materials reinforced by fibers, random fibers, textures, or randomly distributed inclusions [15][16][17][18][19][20]. Regarding the specific application of optical methods to RVE analysis, it should be mentioned that digital image correlation was recently used for multiscale investigation on woven composites [21,22].…”

Section: Introductionmentioning

confidence: 99%

Verification of Continuum Mechanics Predictions with Experimental Mechanics

2019

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The general goal of the study is to connect theoretical predictions of continuum mechanics with actual experimental observations that support these predictions. The representative volume element (RVE) bridges the theoretical concept of continuum with the actual discontinuous structure of matter. This paper presents an experimental verification of the RVE concept. Foundations of continuum kinematics as well as mathematical functions relating displacement vectorial fields to the recording of these fields by a light sensor in the form of gray-level scalar fields are reviewed. The Eulerian derivative field tensors are related to the deformation of the continuum: the Euler-Almansi tensor is extracted, and its properties are discussed. The compatibility between the Euler-Almansi tensor and the Cauchy stress tensor is analyzed. In order to verify the concept of the RVE, a multiscale analysis of an Al-SiC composite material is carried out. Furthermore, it is proven that the Euler-Almansi strain tensor and the Cauchy stress tensor are conjugate in the Hill-Mandel sense by solving an identification problem of the constitutive model of urethane rubber.

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Generation of 3D representative volume elements for heterogeneous materials: A review

Cited by 406 publications

References 506 publications

Functionalisation of metal–polymer-nanocomposites: Chemoelectromechanical coupling and charge carrier transport

Functionalisation of metal–polymer-nanocomposites: Chemoelectromechanical coupling and charge carrier transport

Microstructure‐Based Modeling of Mechanical Properties and Deformation Behavior of DP600 Dual Phase Steel

Verification of Continuum Mechanics Predictions with Experimental Mechanics

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