• Support[@]caeassistant.com
  • Contact Us
CAE Assistant CAE Assistant
Select category
  • Select category
  • Acoustic and shock analyses
  • Beginner's Packages
  • Beginners
  • Buckling and post buckling
  • Business Membership
  • CFD
  • Civil Engineering
  • Cohesive
  • Composite
  • Concrete Reinforcement
  • Consultation service
  • Dynamic Analysis
  • Explosion
  • Fatigue
  • Forming
  • Fracture/Failure
  • Free Packages
  • Full Packages
  • Geostatic
  • Heat Transfer
  • Hyperelasticity
  • Hypermesh
  • Impact
  • Mechanical Enginerring
  • Membership
  • Meshing
  • New-Products
  • Optimization
  • Payment
  • Pre-Order
  • Project Package
  • Scripting
  • Subroutine
  • Thermal mechanical Analysis
  • Training Package
  • Uncategorized
  • Utility
Menu
CAE Assistant CAE Assistant
0 items € 0.0
0 Wishlist
  • Package Shop
    • Full PackagesTo be Expert
    • Mechanical Engineering
      • Forming
      • Dynamic Analysis
      • Fracture/Failure
      • Fatigue
      • Impact
      • Composite
      • Cohesive
    • Civil Engineering
      • Acoustic and shock analyses
      • Buckling and post buckling
      • Geostatic
    • Special OffersHot
      • Free Packages
    • Coding/Utility
      • Subroutine
      • Scripting
      • Utility
  • Blog
    • Abaqus Tutorial & CoursesNew
    • Article
    • Questions and Answers
    • Video Gallery
  • Business Membership
  • Collaboration with usNew
    • Teaching on CAE Assistant
    • Online Tutoring/consulting
Login / Register
0 Wishlist
0 items € 0.0
New
ductile damage abaqus
Ductile Damage Abaqus
Click to enlarge
ductile damage abaqus
Home Fracture/Failure Ductile Damage Abaqus model for 3D continuum element (VUMAT Subroutine)
Produced in Partnership Plan

Ductile Damage Abaqus model for 3D continuum element (VUMAT Subroutine)

Rated 5.00 out of 5 based on 6 customer ratings
(6 customer reviews)

€ 320.0

In this package, the continuum damage mechanics framework for ductile materials  is implemented and developed in ABAQUS by VUMAT Subroutine.

Constitutive modeling is treated within the framework of continuum damage mechanics (CDM) and the effect of micro-crack closure, which may decrease the rate of damage growth under compression, is incorporated and implemented.

The present package has been organized as follows. In the Introduction section, the basis of the CDM in ductile materials is explained, and the applications of the CDM are stated. In the Theory section, the CDM model formulation is briefly reviewed, and with micro-crack closure, the effect is described. In the Implementation section, an algorithm for the numerical integration of the damage constitutive equations is presented. In the VUMAT Subroutine section, the flowchart of the subroutine, and the subroutine structure, step by step, are explained in detail. How to run the VUMAT Subroutine in ABAQUS will be presented in this section. In the Verification section, the validation and verification of the numerical implementation will be evaluated, and the stability, convergence and accuracy of the results will be investigated. In the Application section, the applications of using the ductile damage model in mechanical processes are presented, and the prediction of damage growth and failure in mechanical processes is investigated.

 

 

 

935 Items sold in last month
Add to wishlist
39 People watching this product now!
  • Description
  • Additional information
  • Reviews (6)
  • Shipping and Delivery
Description

Abstract

In this package, the continuum damage mechanics framework for ductile materials developed by Lemaitre is implemented and developed in ABAQUS by VUMAT Subroutine. A wide range of element types, material models and other facilities, such as efficient equation solvers, are available for the user in the ABAQUS software. A fully coupled constitutive elastic-plastic-damage model is used. Ductile Damage Abaqus modeling is fully described here in this training package.

Constitutive modeling is treated within the framework of continuum damage mechanics (CDM), and the effect of micro-crack closure, which may decrease the rate of damage growth under compression, is incorporated and implemented.

The present package has been organized as follows. In the Introduction section, the basis of the CDM in ductile materials is explained, and the applications of the CDM are stated. In the Theory section, the CDM model formulation is briefly reviewed, and with micro-crack closure, the effect is described. In the Implementation section, an algorithm for the numerical integration of the damage constitutive equations is presented. In the VUMAT Subroutine section, the flowchart of the subroutine, and the subroutine structure, step by step, are explained in detail. How to run the VUMAT Subroutine in ABAQUS will be presented in this section. In the Verification section, the validation and verification of the numerical implementation will be evaluated, and the stability, convergence and accuracy of the results will be investigated. In the Application section, the applications of using the ductile damage model in mechanical processes are presented, and the prediction of damage growth and failure in mechanical processes is investigated. You can get more information about Ductile Damage Abaqus modeling on the right-side of this page.


Read More: ddsdde abaqus umat


Introduction

The damage of materials is the progressive physical process by which they break. Damage mechanics is the study, through mechanical variables, of the mechanisms involved in this deterioration when the materials are subjected to loading. In the section, the phenomenological aspects of damage with a description of the different kinds of damage are introduced. Particularly damage models in ductile metals are proposed by Chaboche [1], and Lemaitre [2] are discussed. Under compressive loading, voids and micro-cracks that would grow under tension will partially close, reducing the damage growth rate. This phenomenon can be important in the simulation of forming processes. In this section, all the necessary conditions and parameters affecting ductile damage modeling are introduced.

If you are a beginner in Abaqus simulation, it would be helpful to check out our free Abaqus tutorials on the Free Abaqus Training page.


Read More: damage mechanics


Preview

  • What do we learn from this Ductile Damage Abaqus modeling package?
  • Teaching plan and Prerequisites and Next steps
  • Package specification

Theory of Advanced Lemaitre damage model

Theory

The theory assumes that the state of damage at any material point is isotropic and is represented by a single scalar internal variable, D, associated with the fraction of load carrying area across any surface at that point. The damage variable assumes values between 0 (for the undamaged material) and 1 (for the completely damaged material).

The evolution of the damage internal variable is assumed to be governed by the relation:

The effect of damage on plastic behaviour can be presented by von Mises yield function:

Ductile Damage Abaqus

where \dot{\gamma }  is the accumulated plastic strain, r, s are material constants, The quantity

Ductile Damage Abaqus formulation

and Y, is the damage energy release rate, with E and n denoting, respectively, Young’s modulus and Poisson’s ratio of the undamaged material.

For the crack closure effect; the compressive/tensile additive split of the stress tensor:

Ductile Damage AbaqusDuctile Damage AbaqusDuctile Damage Abaqus

where \sigma ^{+} and \sigma ^{-}  are, respectively, the tensile and compressive components of \sigma. The numerical prediction of material degradation, based on the damage model without crack closure effects, is not in agreement with experimental evidence, which shows that only a relatively small damage accumulation results from the process.

The theory required for the implementation of the ductile damage model according to the modified Lemaitre model  will be presented

Implementation of VUMAT subroutine in Abaqus

Implementation

This section yields to describe an algorithm for the implementation of the elastic-plastic-damage constitutive equations including the effect of crack closure. Algorithms based on the operator split concept, resulting in the standard elastic predictor/plastic corrector format, are widely used in computational plasticity. The flow chart of the elastic predictor/return mapping algorithm for the elastic-plastic-damage model is implemented as shown in figure 1 based on article titled” Numerical analysis of damage evolution in ductile solids“:

Ductile Damage Abaqus flowchart

Figure 1: Flow chart of elastic predictor/return mapping algorithm for the elastic-plastic-damage model / Ductile Damage Abaqus.

Writing VUMAT Subroutine

VUMAT Subroutine

To introduce the ductile damage Abaqus model, a user material subroutine VUMAT is developed in ABAQUS software package. In the VUMAT subroutine, the damage variable will be calculated in each the integration points (or Gauss points) locally. The element deletion option is used with VUMAT to induce ductile crack growth. The developed VUMAT subroutine has the ability to analyze ductile damage in three-dimensional and plane strain cases. 3D and 2D plane strain problems. According that the VUMAT subroutine is run in the ABAQUS/Explicit, it can be used in various problems that require complex contact algorithms. How to run the VUMAT subprogram in ABAQUS will be explained in this section for loading in simple models, such as one element.

VUMAT Subroutine verification

Verification VUMAT Subroutine

Validation and verification of the numerical implementation will be evaluated in various examples. The ductile damage Abaqus model has been verified by solving two numerical examples using ABAQUS/Explicit in two- and three-dimensional solid elements. The first example is the simulation of a two- and three-dimensional tensile test on a specimen subjected to monotonic axial loading. In the second example, the simulation of a three-point bending test is investigated (figure 2). The stability, convergence, and accuracy of the results in these two examples are also evaluated.


Read More: abaqus damage


Ductile Damage Abaqus

Figure 2: Comparison of experimental crack initiation location in three-point bending test

Application of VUMAT subroutine

Application of the VUMAT Subroutine

The modified ductile damage Abaqus model can be used to predict prediction of damage growth and failure in various mechanical processes. For example; the modified ductile damage model is applied to predict initiation of the micro-void as a central burst along the bar axis during the forward extrusion (Figure 3), and prediction of fracture initiation area in the upsetting test of tapered axisymmetric specimen (Figure 4).

Ductile Damage Abaqus

Figure 3: Prediction of central burst along the bar axis during the forward extrusion

Ductile Damage AbaqusDuctile Damage Abaqus

Figure 4: Evolution of damage in tapered axisymmetric specimen

What is the Lemaitre damage model?

This model is a model whose hardening is isotropic and rate-dependent. Also, the yield is based on the von Mises criterion, which is combined with the Lemaitre damage model.

Is the Lemaitre damage model very different from the ductile damage models? And what is the difference between them?

Yes, this model is different from the normal damage model that exists in ABAQUS and other software. In the Lemaitre damage model, yielding and plasticization occur simultaneously with damage, but in the normal models that exist, the damaged area and the plasticity area are two separate areas.

Additional information
Expert

Produced in Partnership Plan

Tutorial video duration

75 minutes

Included

.inps,video files, Fortran files (if available), Flowchart file (if available), Python files (if available), Pdf files (if available)

language

English

Level

Advanced

Package Type

Training

Software version

Applicable to all versions

Subtitle

English

Reviews (6)

6 reviews for Ductile Damage Abaqus model for 3D continuum element (VUMAT Subroutine)

  1. Avatar of Lukas Schmidt

    Lukas Schmidt – January 9, 2023

    Rated 5 out of 5

    I want to connect with the lecturer to collaborate to produce a new subroutine and article. How I can connect to him? I think we can have some gain for each other!

    1 product
  2. Avatar of Amanda dos Santos

    Amanda dos Santos – February 15, 2023

    Rated 5 out of 5

    Ok. that was good. I want to buy a business membership for the university to use all packages for my students without any time limitations. how I can order it? the number of my students is 5 and I need to use Abaqus packages only!

    1 product
  3. Avatar of Patricia Garcia

    Patricia Garcia – March 1, 2023

    Rated 5 out of 5

    This VUMAT subroutine is stronger than the previous one in the package Lemaitre Damage model implementation with VUMAT Abaqus. This subroutine also has veification. That’s great. Keep making professional products

    1 product
  4. Avatar of Marie Dupont

    Marie Dupont – March 6, 2023

    Rated 5 out of 5

    That was great! it is based on scientific articles and works well. I want to write the VUMAT subroutine for my project. Could you help me to write it?

    1 product
  5. Avatar of Jung DOKGO

    Jung DOKGO – March 8, 2023

    Rated 5 out of 5

    That was good and works for all of my simulations. Could you tell me do you have the UMAT version?

    1 product
  6. Avatar of Samuel

    Samuel – May 8, 2023

    Rated 5 out of 5

    How is the stability, convergence, and accuracy of the numerical implementation of the ductile damage model validated and verified in this package? and can you provide any examples of real world applications of ductile damage modeling and how this training package can help me apply the theory in practice?

Add a review Cancel reply

You must be logged in to post a review.

Shipping and Delivery

All the package includes Quality assurance of training packages. According to this guarantee, you will be given another package if you are not satisfied with the training, or your money is returned. Get more information in terms and conditions of the CAE Assistant.
All packages include lifelong support, 24/7 support, and updates will always be sent to you when the package is updated with a one-time purchase. Get more information in terms and conditions of the CAE Assistant.

Notice: If you have any question or problem you can contact us.
Ways to contact us: WhatsApp/Online Support/[email protected]/ contact form.
Projects: Need help with your project? You can get free consultation from us here.

You can buy this package in two ways

  • Online payment: with MasterCard, VisaCard and etc.
  • Offline payment: In this payment method, you should pay via PayPal and send your payment receipt as an attached file in the offline payment form.

How to send the package

  • via download link After purchase, a download link will be sent to you a zip file included training videos, documents and software files.

How to watch the tutorial videos

  • Send us your machine ID

To access tutorial video run the .exe file on your personal pc and send the generated code to [email protected] and wait for your personal code, which is usable only for that pc, up to 24 hours from CAE Assistant support.

Here you can see the purchase process of packages: Track Order

SKU: msh01 Categories: Subroutine, Civil Engineering, Dynamic Analysis, Fracture/Failure, Mechanical Enginerring, New-Products, Training Package Tags: 3D continuum elements, ABAQUS, abaqus toturial collections, continuum damage mechanics, Damage, ductile damage, Lemaitre, Lemaitre damage, plasticity, SUBROUTINE, VUMAT

You may also like…

New
Abaqus forming process simulation

Simulation of forming in ABAQUS

€ 70.0
Rated 5.00 out of 5
(2)
The forming in Abaqus is one of the most important manufacturing processes that can be used for producing different components. In this package, you will learn how to simulate the forming process in Abaqus and you can see the behavior of the material along this process. This package contains some examples that cover rolling, hydroforming, extrusion, ECAP, Cold forging, and drilling processes. Notice: You can access this package 3 days after purchase. 
Add to wishlist
Add to cart
Quick view
UMAT subroutine | Learn UMAT Abaqus | Umat Abaqus course
UMAT

UMAT Subroutine (VUMAT Subroutine) introduction

€ 190.0
Rated 4.91 out of 5
(12)

This package is usable when the material model is not available in ABAQUS software. If you follow this tutorial package, including standard and explicit solver, you will have the ability to write, debug and verify your subroutine based on customized material to use this in complex structures. These lectures are an introduction to write advanced UMAT and VUMAT subroutines in hyperelastic Martials, Composites and Metal and so on.

Watch Demo
Add to wishlist
Add to cart
Quick view
New
Lemaitre damage

Lemaitre Damage model implementation with VUMAT Abaqus

€ 250.0
Rated 5.00 out of 5
(7)
The Lemaitre damage model is now widely used to deal with coupled damage analyses for various mechanical applications. In this package, Firstly, we try to introduce the Lemaitre damage model, including damage mechanics and formulation of the Lemaitre damage model. Then, writing the Lemaitre subroutine is reached step by step. To do this job, the flowchart of the subroutine, Writing the subroutine line by line, implementation of the subroutine in one element and verification is done. In the last chapter, we implement this subroutine in a complex problem, the upsetting process.  
Add to wishlist
Add to cart
Quick view
3D continuum Composite Damage | Progressive hashin damage
3D continuum Composite Damage in ABAQUS

3D continuum Abaqus HASHIN progressive Damage for composite materials (VUMAT Subroutine)

€ 320.0
Rated 5.00 out of 5
(10)
This tutorial teaches how to simulate damage in 3d continuum composite materials in ABAQUS. As you know, Abaqus does not have any material model for 3d composite materials. So, the user needs to write a customized subroutine to simulate damage initiation and progressive damage for composite materials in ABAQUS. In this package, one of the most practical damage initiation criteria (Hashin) is used to detect failure. It should be mentioned that this subroutine includes gradual progressive damage based on the energy method. This complex subroutine could be used for static and dynamic problems.
Add to wishlist
Add to cart
Quick view
Advanced UMAT Subroutine (VUMAT Subroutine) in Abaqus-Front
Advanced UMAT Subroutine (VUMAT Subroutine) in Abaqus-package

Advanced UMAT Subroutine (VUMAT Subroutine) – Abaqus UMAT tutorial

€ 290.0
Rated 5.00 out of 5
(7)
This training package helps Abaqus users to prepare complex UMAT and VUMAT subroutines. This Abaqus UMAT tutorial package is suitable for those who are familiar with subroutine or want to learn UMAT/VUMAT subroutine Professionally. Equations for computational plasticity based on kinematic stiffness are also discussed. In addition, metal damage has been implemented based on Johnson Cook's model. Watch Demo
Add to wishlist
Add to cart
Quick view
Addresses
Carrer de Jaume II ,46015,Valencia ,Spain
REON INTERNATIONAL GROUP LTD, 21 Hill Street, Unit 5, Haverfordwest, Dyfed, United Kingdom, SA61 1QQ (Sales Representative)
Enviroflex GmbH, Sterngasse 3/2/6 1010, Vienna, Austria (Sales Representative)
With our assistance, consider your simulation project is done; we brought together a set of services and tutorial material to meet all your needs in CAE.
Links
  • About Us
  • Portfolio
  • Contact Us
  • Privacy Policy
  • Terms & Conditions
  • Cookie Policy
  • Join Us
  • FAQs
  • CAE Assistant All Rights Reserved
    • Menu
    • Categories
    • Package Shop
      • Full PackagesTo be Expert
      • Mechanical Engineering
        • Forming
        • Dynamic Analysis
        • Fracture/Failure
        • Fatigue
        • Impact
        • Composite
        • Cohesive
      • Civil Engineering
        • Acoustic and shock analyses
        • Buckling and post buckling
        • Geostatic
      • Special OffersHot
        • Free Packages
      • Coding/Utility
        • Subroutine
        • Scripting
        • Utility
    • Blog
      • Abaqus Tutorial & CoursesNew
      • Article
      • Questions and Answers
      • Video Gallery
    • Business Membership
    • Collaboration with usNew
      • Teaching on CAE Assistant
      • Online Tutoring/consulting
    • Package Shop
      • Full PackagesTo be Expert
      • Mechanical Engineering
        • Forming
        • Dynamic Analysis
        • Fracture/Failure
        • Fatigue
        • Impact
        • Composite
        • Cohesive
      • Civil Engineering
        • Acoustic and shock analyses
        • Buckling and post buckling
        • Geostatic
      • Special OffersHot
        • Free Packages
      • Coding/Utility
        • Subroutine
        • Scripting
        • Utility
    • Blog
      • Abaqus Tutorial & CoursesNew
      • Article
      • Questions and Answers
      • Video Gallery
    • Business Membership
    • Collaboration with usNew
      • Teaching on CAE Assistant
      • Online Tutoring/consulting
    • Wishlist
    • Login / Register
    Shopping cart
    Close
    Sign in
    Close

    Lost your password?

    Or login with

    Facebook Google

    No account yet?

    Create an Account
    We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.OkPrivacy policy