Investigation of Density- and Strain Rate-dependent Strain Hardening-softening-coupled material Behavior of Polyurethane Foams using Elasto-viscoplastic Constitutive Model

Frictional Strain Hardening-softening in Experimental and Numerical Investigation of Arching Effect

In the current paper the results of a numerical simulation that were verified by a well instrumented experimental procedure for studying the arching effect over a trapdoor in sand is presented. To simulate this phenomenon with continuum mechanics, the experimental procedure is modeled in ABAQUS code using stress dependent hardening in elastic state and plastic strain dependent frictional harden...

Simulation of long-term consolidation behavior of soft sensitive clay using an elasto-viscoplastic constitutive model

Rate dependent finite strain constitutive model of polyurea

Article history: Received 7 October 2009 Received in final revised form 7 October 2010 Available online 16 October 2010

Rate dependent finite strain constitutive modeling of polyurethane and polyurethane–clay nanocomposites

A finite strain nonlinear viscoplastic constitutive model for polyurethane (PU)–Montmorillonite clay (MTM) nanocomposites is developed with the goal of characterizing the mechanical response under different strain rates and strain amplitudes. In this model, both the elastic and viscous responses are considered to be nonlinear. It is shown that a simple mathematical extension of the model used t...

On Constitutive Relations at Finite Strain: Hypo-elasticity and Elasto-plasticity with Isotropic or Kinematic Hardening*

The question of ‘generalization’ to finite strains of the constitutive relations of infinitesimal strain theory of elasticity, and classical elasto-plasticity with isotropic and kinematic hardening, is critically examined. Simple generalizations, which lead to physically plausible material behaviour, are presented. The current controversies surrounding (i) the choice of stress-rate in the above...