A network of polymers can imbibe a large quantity of a solvent and swell, resulting in a gel. The swelling process can be markedly influenced by a mechanical load and geometric constraint. When the network, solvent, and mechanical load equilibrate, the gel usually swells by a field of inhomogeneous and anisotropic deformation. We show that this field in the swollen gel is equivalent to that in ...

The objective stress rates used in most commercial finite element programs are the Jaumann rate of Kirchhoff stress, Jaumann rates of Cauchy stress, or Green–Naghdi rate. The last two were long ago shown not to be associated by work with any finite strain tensor, and the first has often been combined with tangential moduli not associated by work. The error in energy conservation was thought to ...

This article presents two applications of the nonlinear finite element analysis (FEA) using ABAQUS/Standard with a user developed material subroutine Nitinol UMAT from Abaqus West. The analyses are found to agree well with the theoretical prediction and/or experimental measurement. In that first example, FEA predicts the stress-strain response of a superelastic Nitinol device at different Af te...

The finite element method has been widely used to investigate the mechanical behavior of biological tissues. When analyzing these particular materials subjected dynamic requests, time integration algorithms should be considered incorporate inertial effects. These can classified as implicit or explicit. Although both have in different scenarios, a comparative study outcomes methods is important ...

Three-point bend fracture tests have been conducted at different loading rates with a quadratic martensitic steel. The failure energy has found to increase rate. To get insights in this numerical investigation undertaken strategies using ABAQUS and IMPETUS softwares order address quasi-static dynamic conditions. Simulations were the software carry out comparative analysis of both implicit expli...

Abstract This paper is majorly discussing the impact resistance of hierarchical lightweight lattice structure. Firstly, unit cells pyramidal structure and traditional single-stage hollow are designed. At same time, concept relative density introduced to better demonstrate In this paper, ABAQUS/Explicit software used simulate drop hammer simulation The result shows that than Meanwhile, samples p...

A deformation dependent stick-slip based friction model is realised to better represent the contact stresses in secondary shear zone. The instantaneous nodal limiting stress implemented a VFRIC subroutine ABAQUS\Explicit 2D ALE orthogonal cutting simulations investigate effects on accuracy of simulations. This study highlights that varies along rake face, as well with angle and uncut chip thick...

One of the bellows producing method is hydroforming process .Whereas some factor of hydroforming process specially internal pressure affects on final characteristics produced bellows such as bursting, wrinkling and wall thickness distribution. In this paper the effect of internal pressure factor in final quality of produced bellows will be investigated. In simulation of process, ABAQUS/Explicit...

The main aim of this paper is to study the material removal phenomenon using the finite element method (FEM) analysis for orthogonal cutting, and the impact of cutting speed variation on the chip formation, stress and plastic deformation. We have explored different constitutive models describing the tool-workpiece interaction. The Johnson-Cook constitutive model with damage initiation and damag...

The main purpose of the present work is multi-objective shape optimization of a projectile tip for impacting and normal penetrating. Velocity drop, weight and inner volume of projectile have been considered as three conflicting objective functions.  For this purpose, at the first step, finite element modeling was done using ABAQUS/Explicit and projectile penetration was examined in different ge...