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...

This paper presents a novel formulation for the computational homogenization analysis of materials at limit state. The polynomial interpolations are employed to impose periodic boundary conditions fluctuating term displacement field when using arbitrary finite element meshes. Second-order cone programming provides an efficient solution solve resulting optimization problems, and accurate load mu...

An elastomer is a polymer with the property of viscoelasticity, generally having notably low Young's modulus and high yield strain compared with other materials.  Elastomers, in particular rubbers, are used in a wide variety of products ranging from rubber hoses, isolation bearings, and shock absorbers to tires. Rubber has good properties and is thermal and electrical resistant. We used carbon ...

The work investigates the applicability of unresolved Computational Fluid Dynamics and Discrete Element Method (CFDDEM) technique based on empirical equations for fluid-particle coupling. We first carry out a series representative volume element simulations using high-resolution particle-resolved Lattice Boltzmann method (LBMDEM) coupled by an Immersed Moving Boundary (IMB) scheme. Then, we com...

This study presents a computational model for investigation of the air permeability coefficient and water-vapor resistance through 3D textile layer. The effective values coefficients are highly dependent on volumetric internal structure water vapor flow has been performed microscale finite element representative volume layer by taking into account real configuration yarns filaments. were obtain...

Abstract Macroscale cleavage fracture toughness of high strength steels is strongly related to the hard microstructural inclusions. Therefore, an accurate determination local stress on these inclusions based matrix necessary for statistical modelling macroscale fracture. This paper presents analytical equations quantitatively estimate from far-field matrix. The account inclusion shape, orientat...

Using crystal plasticity, finite element analyses were carried out to model cyclic deformation for a low solvus high refractory (LSHR) nickel superalloy at elevated temperature. The analyses were implemented using a representative volume element (RVE), consisting of realistic microstructure obtained from SEM images of the material. Monotonic, stress-relaxation and cyclic test data at 725 C were...

Theoretical analysis and finite element (FE) simulation have been carried out for a constant specific load rate (CSLR) indentation creep test. Analytical results indicate that both the representative stress and the indentation strain rate become constant after a transient period. Moreover, the FE simulation reveals that both the contours of equivalent stress and equivalent plastic strain rate u...