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190465

Damage Prediction and Evolution using Uncoupled Elastoplastic-Damage Lemaitre’s and Vaz’s Models

Article

Last updated: 04 Jan 2025

Subjects

-

Tags

Mechanical and Industrial Engineering

Abstract

This paper presents the two uncoupled elastoplastic-damage models; uncoupled Lemaitre's and Vaz's damage models. The two models are implemented into the finite element ABAQUS software using user routine UMAT to analyze and predict damage and damage evolution. In the context of von-Mises yield criteria, damage variable and fracture indicator are predicted, in addition to the von-Mises stress and the effective plastic strain. Both the elastoplastic tangent operator and the return mapping procedure are formulated using the consistent formulation. Two cases have been analyzed; the first one is an axisymmetric notched bar, while the second case is a plane strain doubled notched plate. In addition to the aforementioned predictions, a parametric study is carried out to explore the effect of the damage denominator and damage exponent on the damage behavior. It is concluded that the two models succeeded in the prediction of the point of fracture, while the uncoupled Lemaitre's damage model gives a more efficient description of the damage band.

DOI

10.21608/eijest.2021.69915.1063

Keywords

plasticity, Lemaitre’s damage model, Finite Element, Damage variable, Fracture indicator

Authors

First Name

Mohamed

Last Name

El-Shourbagy

MiddleName

Akram

Affiliation

Department of Mechanical Design and Production Engineering, Faculty of Engineering, Zagazig University, 44519, Zagazig, Egypt

Email

ma.elshourbagy@gmail.com

City

Zagazig

Orcid

0000-0003-2720-046X

First Name

Mohamed

Last Name

Attia

MiddleName

Adly

Affiliation

Department of Mechanical Design and Production Engineering, Faculty of Engineering, Zagazig University, 44519, Zagazig, Egypt

Email

mohadlyattia@yahoo.com

City

Zagazig

Orcid

0000-0002-6485-9880

First Name

Ahmed

Last Name

El-Shafei

MiddleName

Gad

Affiliation

Department of Mechanical Design and Production Engineering, Faculty of Engineering, Zagazig University, 44519, Zagazig, Egypt

Email

agelshafei@yahoo.com

City

Zagazig

Orcid

-

Volume

36

Article Issue

2

Related Issue

27354

Issue Date

2021-12-01

Receive Date

2021-04-17

Publish Date

2021-12-01

Page Start

33

Page End

42

Print ISSN

1687-8493

Online ISSN

2682-3640

Link

https://eijest.journals.ekb.eg/article_190465.html

Detail API

https://eijest.journals.ekb.eg/service?article_code=190465

Order

1

Type

Original Article

Type Code

1,348

Publication Type

Journal

Publication Title

The Egyptian International Journal of Engineering Sciences and Technology

Publication Link

https://eijest.journals.ekb.eg/

MainTitle

Damage Prediction and Evolution using Uncoupled Elastoplastic-Damage Lemaitre’s and Vaz’s Models

Details

Type

Article

Created At

23 Jan 2023