A numerical method to compute the Effective Thermal Conductivity (ETC) of granular media surrounded by a stagnant fluid is presented. Based on geometry and size grains, Representative Volume Elements (RVE) created using Discrete Element Method (DEM) while ETC this RVE estimated with Fast Fourier Transform (FFT) computations. To bridge gap between DEM FFT, discretization algorithm (voxelization ...

In this study, the mechanical and thermal behavior of the nano-reinforced polymer composite reinforced by Montmorillonite (MMT) nanoparticles is investigated. Due to low cost of computations, the 3D representative volume elements (RVE) method is utilized using ABAQUS finite element commercial software. Low density poly ethylene (LDPE) and MMT are used as matrix and nanoparticle material, respec...

The present paper deals with a micromechanical model of interface able to couple the damage (micro-crack) evolution, the non-penetration conditions (Signorini equations) and the friction effect (Coulomb’s law). At a typical point of the interface, a Representative Volume Element (RVE) is considered; it is characterized by the presence of two different materials and by a microcrack evolving alon...

A coupled hygro-thermo-mechanical computational model is proposed for fibre reinforced polymers, formulated within the framework of Computational Homogenisation (CH). At each macrostructure Gauss point, constitutive matrices for thermal, moisture transport and mechanical responses are calculated from CH of the underlying representative volume element (RVE). A degradation model, developed from e...

Polymer-matrix composites are widely used in various industries due to their high specific strength and stiffness. However, the void formation is inevitable as a by-product during manufacturing processes, which may have negative effects on its mechanical properties. The purposes of this paper quantitatively evaluate influence voids anisotropic elastic properties provide corresponding theoretica...

Abstract We propose a new direction-dependent model for the unilateral constraint involved in phase field approach to fracture and also continuous damage mechanics models. The construction of this is informed by micromechanical modeling through homogenization theory, where representative volume element (RVE) has planar crack center. proposed made closely match response RVE, including frictionle...

The influences of loading path on the failure unidirectional (UD) carbon fibre reinforced polymer (CFRP) composite laminae IM7/8552 are studied. A 3D representative volume element (RVE) based micromechanical model is established using finite method (FEM) to capture coupled effects fibres, matrix and fibre/matrix interface under different multiaxial conditions. An artificial neural network (ANN)...

Abstract Peridynamic theory has been shown to possess the capabilities of describing phenomena that theories based on partial differential equations are not capable describing. These include nonlocal interactions and presence singularities in system responses. To exploit offered by peridynamics homogenization heterogenous media, a computational peridynamic correspondence model (non-ordinary sta...

Because of the substantial difference in stiffness between matrix and nanotube in CNT composite, the stress transfer between them controls their mechanical properties. This paper investigates the said issue, analytically and numerically, in axial load using representative volume element (RVE). The analytical model was established based on the modified Cox’s shear lag model with the use of some ...

In this article, axisymmetric buckling behavior of piezoelectric fiber reinforced polymeric composite (PFRPC) annular plate subjected to electro-thermo-mechanical field is presented utilizing principle of minimum potential energy. Boron-nitride nanotubes (BNNTs) are used as fibers. Full coupling between electrical, mechanical and thermal fields are considered according to a representative volum...