Magneto-elastic abrasive grains have magnetism, low elastic modulus and excellent performance, the characteristics of bonded loose grains. The dual-disk magnetic preparation greatly improves quality efficiency. Firstly, magneto-elastic particles are introduced into edge tool, method 4035 silica gel is proposed. According to microscopic particles, finite element software ABAQUS used establish pa...

For crystal plasticity formulation neglecting the strain gradients at dislocation scale, backstresses are necessary to satisfy mesoscopic stress equilibrium and compatibility requirements. Backstresses in a material point those between neighboring points treated separately. Physically can dynamically induce either hardening or softening effects adjust of slip systems, whereas sum stresses resul...

The current trend in microelectronics towards miniaturization has pushed for an interest in theories intended to explain the behavior of materials at small scales. In particular, an increase in yield strength with decreasing size has been experimentally observed in several materials and under different loading conditions. A class of non-classical continuum mechanics theories has been recently e...

Cold compaction is an essential step of the powder metallurgy process, which cost-effective in manufacturing industry. In present study, pure iron investigated. A MATLAB code developed to create a representative volume element with given size distribution, number particles, and initial relative density. The finite analysis performed by implementing ABAQUS/Explicit python script. Multi-particle ...

Abstract We construct two-dimensional, two-phase random heterogeneous microstructures by stochastic simulation using the planar Boolean model, which is a collection of overlapping grains. The structures obtained are discretized finite elements. A Neo-Hooke law assumed for phases microstructure, and tension tests simulated ensembles microstructure samples. determine effective material parameters...

This paper presents a versatile model-free approach for linking the damage in highly heterogeneous materials at multiple scales. The proposed scheme evolves from phase-field modelling microscopic scale to simulate brittle failure, towards estimation of effective elastic, toughness and strength properties material mesoscopic scale, via coarse-graining technique. On one side, it’s shown that, com...

The objective of the paper is to demonstrate the calculation of micromorphic continuum stress measures based directly on three-dimensional (3D) ellipsoidal discrete element (DE) simulations over representative volume elements (RVE) within the DE domain representing granular media. We will demonstrate these calculations for two simulations: (1) pile penetration, and (2) cavity expansion. All cal...

The damage constitutive model is of great significance to research the stress-strain relationship and evolution rock under loading in engineering. In order investigate effect anisotropic characteristic on evolution, a statistical true triaxial condition was developed. this study, plane which existed perpendicular coordinate axis extracted from representative volume element (RVE) rock. assumed b...

Abstract To relate the thermomechanical behaviour and microstructural evolution of heat-assisted incremental sheet forming (SPIF) for Ti–6Al–4 V sheet, multi-scale models based on crystal plasticity finite element model (CPFEM), representative elementary volume (RVE), cellular automaton (CA) were established in this article. An experimental-scale CPFEM was built advance to provide macrograin le...

Shock wave induced spall fracture is a complex multiscale phenomenon, and it is a challenge to build a constitutive and computational model that can capture the essential features of the spall fracture. In this work, we present a computational micro-mechanics model to simulate spall fracture by using part of the multiscale micro-mechanics theory proposed the Wright and Ramesh (Wright and Ramesh...