The focus of this study is to investigate the capabilities of three dimensional (3D) RVE models in predicting the tensile modulus of carbon nanotube/polypropylene (CNT/PP) composites, which differ slightly in the dispersion, agglomeration, and orientation states of CNT within the PP matrix. The composites are made using melt mixing followed by either injection molding or melt spinning of fibers...

Abstract In chemical mechanical polishing (CMP) for IC fabrication, porous pads are critical achieving extremely consistent throughput in CMP process. The pad hardness, porosity of pad, and pore sizes the thermoplastic polyurethanes foam fabrication procedure determine properties pads. This paper aims to develop a methodology modeling macro micro hardness. IC1000 has been analyzed with develope...

Abstract. Numerical homogenization is used for upscaling of the linear elasticity tensor of strongly heterogeneous microstructures. The implemented 3D algorithm is described in terms of six auxiliary elastic problems for the reference volume element (RVE). Rotated trilinear RannacherTurek finite elements are used for discretization of the involved subproblems. A parallel PCG method is implement...

A three-dimensional (3D) representative volume element (RVE) model was developed for analyzing effective mechanical behavior of fiber-reinforced ceramic matrix composites with imperfect interfaces. In the model, the fiber is assumed to be perfectly elastic until its tensile strength, and the ceramic material is modeled by an elasto-plastic Drucker-Prager constitutive law. The RVE model is then ...

Mechanical characterization of protein molecules has played a role on gaining insight into the biological functions of proteins, because some proteins perform the mechanical function. Here, we present the mesoscopic model of biological protein materials composed of protein crystals prescribed by Go potential for characterization of elastic behavior of protein materials. Specifically, we conside...

In this contribution, ellipsoidal and hexagonal prism representative volume element (RVE) which characterize the steel fiber reinforced high performance concrete (HPC) along a preferred direction are constructed analyzed numerically. A virtual experiment is simulated using microscopic boundary value problem based on two different RVEs. The suitable mechanical periodic conditions applied each RV...

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...

A novel micromechanics based damage model is proposed to address failure mechanism of defected solids with randomly distributed penny-shaped cohesive micro-cracks (Barenblatt–Dugdale type). Energy release contribution to the material damage process is estimated in a representative volume element (RVE) under macro hydrostatic stress state. Macro-constitutive relations of RVE are derived via self...

This work presents a lattice-particle model for the analysis of steel fiber-reinforced concrete (SFRC). In this approach, fibers are explicitly modeled and connected to the concrete matrix lattice via interface elements. The interface behavior was calibrated by means of pullout tests and a range for the bond properties is proposed. The model was validated with analytical and experimental result...

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)...