Finite element implementation of a certain class of elasto-viscoplastic constitutive models

Finite element formulation for modelling large deformations in elasto-viscoplastic polycrystals

Anisotropic, elasto-viscoplastic behaviour in polycrystalline materials is modelled using a new, updated Lagrangian formulation based on a three-field form of the Hu-Washizu variational principle to create a stable finite element method in the context of nearly incompressible behaviour. The meso-scale is characterized by a representative volume element, which contains grains governed by single ...

Elasto-Plastic Constitutive Model for Finite Element Simulation of structural Adhesives

Considered by the automotive industry as a good solution to bond car body parts together, structural adhesives must be integrated in the early design process of vehicles, hence in the finite element analysis. A first difficulty when modeling structural adhesives comes from their complex mechanical pressure-dependent behaviour as well as their load-dependent strength. These aspects make them imp...

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

An elasto-viscoplastic interface model for investigating the constitutive behavior of nacre

In order to better understand the strengthening mechanism observed in nacre, we have developed an interface computational model to simulate the behavior of the organic present at the interface between aragonite tablets. In the model, the single polymer-chain behavior is characterized by the worm-like-chain (WLC) model, which is in turn incorporated into the eight-chain cell model developed by A...

A Finite Element Study of Elasto-plastic Hemispherical Contact

This work presents a finite element study of elasto-plastic hemispherical contact. The results are normalized such that they are valid for macro contacts (e.g., rolling element bearings) and micro contacts (e.g., asperity contact). The material is modeled as elastic-perfectly plastic. The numerical results are compared to other existing models of spherical contact, including the fully plastic c...