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)...

carbon nanotube (cnt) is considered as a new generation of material possessing superior mechanical, thermal and electrical properties. the applications of cnt, especially in composite materials, i.e. carbon nanotube reinforced polymer have received great attention and interest in recent years. to characterize the influence of cnt on the stress intensity factor of nanocomposites, three fracture ...

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...

In the breast of adult women, glandular and fat tissues are intermingled and cannot be clearly distinguished. This work studies if this mixture can be treated as a homogenized tissue. A mechanical model is proposed for the mixture of tissues as a function of the fat content. Different distributions of individual tissues and geometries have been tried to verify the validity of the mixture model....

Abstract. The present work presents statistical results of numerical simulations to investigate the effect different void percentages on composite materials’ coefficient thermal expansion (CTE). A random distribution voids is simulated over Representative Volume Element (RVE) matrix. use a high-order beam model within framework Carrera Unified Formulation (CUF) leads Component Wise (CW) descrip...

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...

The microstructure-based finite element modeling (MB-FEM) of material representative volume (RVE) is a widely used tool in the characterization and design various composites. However, MB-FEM has number deficiencies, e.g., time-consuming generation workable geometric model, challenge achieving high volume-fractions inclusions, poor quality mesh. In this paper, we first demonstrate that for parti...

The critical state of a granular material made rounded tetrahedral particles is studied through DEM simulations triaxial compressions. A minimum number 7,500 first obtained as the representative volume element (RVE) for present simulations. Then, macroscopic line (CSL) shown to be increasing in (stress, density) space low confining pressures. Such an unexpected behaviour explained by existence ...