Topic
Representative elementary volume
About: Representative elementary volume is a research topic. Over the lifetime, 4105 publications have been published within this topic receiving 86863 citations.
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TL;DR: In this paper, a multiphysics micromechanics model is developed to predict the effective properties as well as the local fields of periodic smart materials responsive to fully coupled electric, magnetic, thermal and mechanical fields.
Abstract: A multiphysics micromechanics model is developed to predict the effective properties as well as the local fields of periodic smart materials responsive to fully coupled electric, magnetic, thermal and mechanical fields. This work is based on the framework of the variational asymptotic method for unit cell homogenization (VAMUCH), a recently developed micromechanics modeling scheme. To treat the general microstructure of smart materials, we implemented this model using the finite element technique. Several examples of smart materials are used to demonstrate the application of the proposed model for prediction of multiphysical behavior.
48 citations
TL;DR: In this article, a multiscale damage model is proposed to predict the failure properties and ultimate burst pressure of composite pressure vessel, where the macroscopic damage evolution and stiffness properties of the composite vessel are represented by those of the representative volume element (RVE).
48 citations
TL;DR: In this paper, an incremental digital volume correlation (DVC) technique was developed to determine the internal deformations and to track the movement of individual sugar grains, while its internal microstructures were determined by X-ray micro-computed tomography.
Abstract: A polymer bonded sugar (PBS) cylindrical specimen, in which caster sugar grains are embedded in hydroxylterminated polybutadiene (HTPB) binder matrix, was compressed up to −31.5 % of compressive strain without confinement, while its internal microstructures were determined by X-ray micro-computed tomography. The reconstructed volumetric images were analyzed to determine three-dimensional (3D) morphologies and to investigate the damage and failure mechanisms. The image grayscale was filtered by threshold values to identify individual material constituents, and determine grain volume fraction. An incremental digital volume correlation (DVC) technique was developed to determine the internal deformations and to track the movement of individual sugar grains. The evolution of the internal 3D deformation of PBS is correlated to its microstructures, as well as debonding and void formation. The side length of a cubic representative volume element (RVE) for the PBS is determined as 10 times of the average grain size, based on the analysis of sugar volume fraction; it is consistent with the RVE size determined from convergence analysis of the average and the standard deviation of strain distribution. Image analysis indicates that void ratio can be used as an indicator to quantify the extent of damage. Debonding occurs at first in the inner core region, and then propagates to the outer annular region. Debonding is also determined as the primary mechanism for damage formation and evolution. Grain fracture was not observed during the uniaxial compression of this PBS specimen under a nominal strain of −31.5 % without confinement.
48 citations
TL;DR: In this article, the authors investigated a quantitative characterization of the microstructure using optical images and spatial descriptors and defined the representative volume element (RVE) for statistical parameters and effective thermal conductivities.
48 citations
TL;DR: The elastic micromechanics model presented accurately predicted elastic modulus and polymerization shrinkage strain as a function of filler fraction, superior to other analytical methods.
48 citations