University of Hertfordshire

By the same authors

An equivalent damage force approach to modelling of strain softening materials

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Original languageEnglish
Title of host publicationECCM 2018 - 18th European Conference on Composite Materials
PublisherApplied Mechanics Laboratory
ISBN (Electronic)9781510896932
Publication statusPublished - 24 Jun 2020
Event18th European Conference on Composite Materials, ECCM 2018 - Athens, Greece
Duration: 24 Jun 201828 Jun 2018

Publication series

NameECCM 2018 - 18th European Conference on Composite Materials

Conference

Conference18th European Conference on Composite Materials, ECCM 2018
Country/TerritoryGreece
CityAthens
Period24/06/1828/06/18

Abstract

The work presented in this paper is related to the problem of damage/deformation localisation typical for the finite element analysis of softening materials based on local constitutive models and continuum damage mechanics. This problem is characterised with change of the type of partial differential equations, due to material softening, leading to ill-posed boundary value problem and mesh dependency. In the equivalent damage force (EDF) approach damage effects are represented as a force on the right-hand side of the balance of linear momentum equation [23]. The main advantages of this approach are that the problem remains well posed, i.e. partial differential equations remain unchanged when the material starts softening. Numerical stability is maintained, and mesh dependency significantly reduced. The EDF model implemented in the explicit transient non-linear finite element code DYNA3D [12] is undergoing further validation in modelling several impact experiments presented here. The numerical results have nonlocal character with a finite size damaged zone. The size of the zone is controlled with the damage characteristic length, which is an input parameter independent of the discretisation density. This is work in progress and more comprehensive analysis of the validation cases will be completed in near future.

Notes

Funding Information: The project leading to this publication has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 636549. Funding Information: The project leading to this publication has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 636549. Publisher Copyright: © CCM 2020 - 18th European Conference on Composite Materials. All rights reserved.

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