scholarly journals Study of the mechanical properties and effects of particles for oxide dispersion strengthened Zircaloy-4 via a 3D representative volume element model

2021 ◽  
Author(s):  
Dong-Hyun Kim ◽  
Jong-Dae Hong ◽  
Hyochan Kim ◽  
Jaeyong Kim ◽  
Hak-Sung Kim
Keyword(s):  
Mechanical Properties ◽  
Representative Volume Element ◽  
Oxide Dispersion Strengthened ◽  
Element Model ◽  
Volume Element ◽  
Oxide Dispersion ◽  
Representative Volume

Crystal Plasticity Simulation of the Bauschinger Effect of Polycrystalline AA7075 through a Texture-Based Representative Volume Element Model

2014 ◽  
Vol 553 ◽  
pp. 22-27
Author(s):  
Ling Li ◽  
Lu Ming Shen ◽  
Gwénaëlle Proust
Keyword(s):  
Finite Element ◽  
Representative Volume Element ◽  
Crystal Plasticity ◽  
Bauschinger Effect ◽  
Voronoi Tessellation ◽  
Strain Curve ◽  
Element Model ◽  
Volume Element ◽  
Model Parameters ◽  
Representative Volume

A texture-based representative volume element (TBRVE) model is developed for the three-dimensional crystal plasticity (CP) finite element simulations of the Bauschinger effect (BE) of polycrystalline aluminium alloy 7075 (AA7075). In the simulations, the grain morphology is created using the Voronoi tessellation method with the material texture systematically discretised from experiment. A modified CP constitutive model, which takes into account the backstress, is used to simulate the BE during cyclic loading. The model parameters are calibrated using the first cycle stress-strain curve and used to predict the mechanical response to the cyclic saturation of AA7075. The results indicate that the proposed TBRVE CP finite element model can effectively capture the BE at the grain level.

Representative Volume Element for Mechanical Properties of Carbon Nanotube Nanocomposites Using Stochastic Finite Element Analysis

2020 ◽  
Vol 142 (3) ◽  
Author(s):  
Seyed Hamid Reza Sanei ◽  
Randall Doles
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Representative Volume Element ◽  
Volume Element ◽  
Length Scale ◽  
Stochastic Finite Element ◽  
Element Analysis ◽  
Representative Volume ◽  
Element Approach ◽  
Stochastic Finite Element Analysis

Abstract The aim of this study is to present a representative volume element (RVE) for nanocomposites with different microstructural features using a stochastic finite element approach. To that end, computer-simulated microstructures of nanocomposites were generated to include a variety of uncertainty present in geometry, orientation, and distribution of carbon nanotubes. Microstructures were converted into finite element models based on an image-based approach for the determination of elastic properties. For each microstructure type, 50 realizations of synthetic microstructures were generated to capture the variability as well as the average values. Computer-simulated microstructures were generated at different length scales to determine the change in mechanical properties as a function of length scale. A representative volume element is defined at a length scale beyond which no change in variability is observed. The results show that there is no universal RVE applicable to all properties and microstructures; however, the RVE size is highly dependent on microstructural features. Microstructures with agglomeration tend to require larger RVE. Similarly, random microstructures require larger RVE when compared with aligned microstructures.

scholarly journals Representative volume element model of lithium-ion battery electrodes based on X-ray nano-tomography

2017 ◽  
Vol 47 (3) ◽  
pp. 281-293 ◽  
Author(s):  
Ali Ghorbani Kashkooli ◽  
Amir Amirfazli ◽  
Siamak Farhad ◽  
Dong Un Lee ◽  
Sergio Felicelli ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Representative Volume Element ◽  
Lithium Ion ◽  
Element Model ◽  
Volume Element ◽  
X Ray ◽  
Representative Volume

Response of Random Chopped Fiber Reinforced Composite to Uniaxial Tensile Load

2009 ◽  
Author(s):  
Yi Pan ◽  
Assimina A. Pelegri
Keyword(s):  
Representative Volume Element ◽  
Fiber Composite ◽  
Analytical Calculation ◽  
Tensile Load ◽  
Element Model ◽  
Elastic Stiffness ◽  
Volume Element ◽  
Uniaxial Tensile ◽  
Fiber Reinforced ◽  
Representative Volume

Recent interests of application of random chopped fiber reinforced composites in manufacturing lightweight components in the automotive industry motivate active research on the material behaviors of this kind of materials. A representative volume element is generated numerically based on microscopic observation on the realistic samples. It captures the complex meso-structure of random chopped fiber composites. A finite element model is developed for the RVE of random chopped fiber composite. The elastic stiffness properties of the composite material thus can be derived with homogenization scheme. The representative volume element was verified by Young’s modulus obtained from experimental measurements and analytical calculation of the modulus by other methods. Furthermore, damages deboning of fiber/matrix interface is simulated using the representative volume element.

Crystal plasticity modeling of grain refinement in aluminum tubes during tube cyclic expansion-extrusion

2016 ◽  
Vol 232 (6) ◽  
pp. 481-494 ◽  
Author(s):  
A Babaei ◽  
MM Mashhadi ◽  
F Mehri Sofiani
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Representative Volume Element ◽  
Crystal Plasticity ◽  
Element Model ◽  
Volume Element ◽  
Deformation History ◽  
Crystal Plasticity Finite Element ◽  
Representative Volume ◽  
History Of

In the present study, a crystal plasticity finite element model was developed for simulating the microstructure evolution and grain refinement during tube cyclic expansion-extrusion as a severe plastic deformation method for tubular materials. A new approach was proposed for extracting the real deformation history of a representative volume element during severe plastic deformation methods. The deformation history of a representative volume element during four cycles of tube cyclic expansion-extrusion was extracted by the proposed approach. Then, in a crystal plasticity finite element model, the deformation history was applied to a two-dimensional polycrystalline representative volume element with randomly assigned crystalline orientations. The intergranular interactions between grains and the intragranular orientation gradients were successfully simulated by the crystal plasticity finite element model. The distribution of misorientation angles, the evolution of grain boundaries, and the achieved average grain size after different cycles of tube cyclic expansion-extrusion were investigated by the crystal plasticity finite element model. On the other hand, ultrafine grained aluminum tubes were processed by four cycles of tube cyclic expansion-extrusion and the grain size of the processed tubes was studied by scanning electron microscopy observations and X-ray diffraction analyses. The experimental and predicted (by crystal plasticity finite element model) average grain sizes were compared.

Finite Element Modeling of the Ferroelectroelastic Material Behavior in Consideration of Domain Wall Motions

2005 ◽  
Vol 881 ◽  
Author(s):  
Albrecht C. Liskowsky ◽  
Artem S. Semenov ◽  
Herbert Balke ◽  
Robert M. McMeeking
Keyword(s):  
Finite Element ◽  
Representative Volume Element ◽  
Element Model ◽  
Ferroelectric Materials ◽  
Material Point ◽  
Volume Element ◽  
Material Behavior ◽  
Internal Variables ◽  
Gauss Point ◽  
Representative Volume

AbstractA simulation of the nonlinear electromechanical macroscopic behavior of ferroelectric materials by means of the finite element method is presented. A material point is depicted by a representative volume element, for which homogeneous boundary conditions are valid. The evolution of integral averages over the representative volume element is to homogenize the results. For this homogenization we favor a finite element model in which each Gauss point represents exactly one single crystal. Their number of internal variables is limited to the lattice orientation and the volume fractions of the domains. The former are randomly distributed in space. It is possible to calculate the material behavior for arbitrary coupled and nonlinear electromechanical loading cases, but the model is not effective for the solution of boundary value problems for entire bodies.

Prediction of Rice Husk Particulate-Filled Polymer Composite Properties Using a Representative Volume Element (RVE) Model

2015 ◽  
Author(s):  
Pandhita Pochanard ◽  
Anil Saigal
Keyword(s):  
Mechanical Properties ◽  
Representative Volume Element ◽  
Rice Husk ◽  
Agricultural Waste ◽  
Volume Element ◽  
Raw Material ◽  
Analytical Models ◽  
Volume Percentage ◽  
Waste Products ◽  
Representative Volume

In this study, a numerical representative volume element (RVE) model was used to predict the mechanical properties of a Rice Husk Particulate (RHP)-Epoxy composite for use as an alternative material in non-critical applications. Seven different analytical models Counto, Ishai-Cohen, Halpin-Tsai, Nielsen, Nicolais, Modified Nicolais and Pukanszky were used as comparison tools for the numerical model. The mechanical properties estimated for 0%, 10% and 30% RHP-Epoxy composites using the numerical and analytical models are in general agreement with each other. Using the analytical models, it was calculated that an increase in volume percentage of RHP to 30% led to continual reduction in elastic Young’s modulus and ultimate tensile strength of the composite. The numerical RVE models also predicted a similar trend between filler volume percentage and material properties. Overall, the results of this study suggest that RHP can be used to reduce the composite raw material costs by replacing the more expensive polymer content with agricultural waste products with limited compromise to the composite’s mechanical properties.

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