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VUEL abaqus
Introduction to VUEL Subroutine in ABAQUS-Package
HomeSubroutine Introduction to VUEL Subroutine in ABAQUS

Introduction to VUEL Subroutine in ABAQUS

Rated 4.50 out of 5 based on 2 customer ratings
(2 customer reviews)

€ 210

VUEL is the UEL subroutine for the Explicit solver. UEL is for the Standard solver, and VUEL is for the Explicit solver. Of course, there are some other differences between these two subroutines as well, such as in inputs, variables, etc. This tutorial package is used for writing the most sophisticated subroutines in ABAQUS, VUEL, which are applicable to customized problems. The stiffness matrix and nodal forces are the output of the subroutine, which can be defined based on several variables. This tutorial package contains two workshops: the first is divided into three sections, which model truss elements, and the second workshop explains how to use VUEL and VUMAT subroutines in one model.

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Description

Introduction to VUEL Subroutine in ABAQUS

VUEL subroutine is one of the most difficult subroutines which works with Abaqus/Explicit solver. Only advanced users could use this complex subroutine. This training package help users to learn this subroutine easily step by step.
In this Subroutine, element-based equations and relationships between the element stiffness, node forces, and mass matrix should be defined.

This subroutine will be called for each element that is of a general user-defined element type each time element calculations are required, and should perform all of the element calculations to appropriate in the current activity of the analysis.

In this subroutine, the properties of the material change to an arbitrary dependent variable. It should be mentioned, The general information is available in Abaqus Documentation.

The Abaqus user subroutine allows the program to be customized for particular applications which are not available through the main Abaqus facilities. You should write a user subroutine if you cannot run your analysis by ABAQUS built-in models for materials, loads, properties, elements, etc. for example, if you need to model a user-defined nonlinear stress-strain relation, which is not provided by Abaqus, then look for UMAT user subroutine. A more advanced subroutine is UEL, which allows the creation of user-defined elements. If it is your first time writing a subroutine like UEL please read the Start Writing an Abaqus Subroutine: Basics & Recommendations article. After reading this post and watching this tutorial’s Demo video, you will definitely decide to save your time in Abaqus modelling and get this UEL training package. If you have questions, ask here on our live chat on the left.

Some examples of Abaqus UEL/VUEL usage:

Some examples of Abaqus UEL\VUEL usage:

Here, we have listed examples of using Abaqus VUEL subroutines in scholarly research. You can get some idea about that, but notice this package does not cover the below topics, and this section is just for your information.

  1. Geo-structures used to dispose of municipal solid waste are called sanitary landfills (MSW). Leachate, which contains a lot of contaminants, makes it so that a landfill’s failure could result in both immediate geotechnical disaster and long-term environmental catastrophe. An advanced numerical approach was done considering material and contact nonlinearity for seismic analysis of landfills. The formulation of this numerical approach was applied by the VUEL subroutine in Abaqus.
  2. A research was done for RC Structures Seismic Damage Analysis Model Based on Concrete Plastic Damage Model. Concrete’s plastic deformation equations, damage evolution equations, and damage constitutive equations are derived. Second, by examining a segment of the fiber beam-column element, which was generated with the VUEL subroutine based on the ABAQUS/Explicit platform, a Fiber Damage Analysis Model (FDAM) for RC beam-column member is established.
  3. Solid-shell elements are a family of typical double-surfaced shell elements without rational degrees of freedom that are more suited than traditional shell elements for the analysis of double-sided contact problems. In a research, the explicit finite element program ABAQUS/Explicit is used to create a solid-shell finite element model as a user-defined element (VUEL), through which the sheet metal forming processes are simulated. As opposed to earlier studies on the solid-shell elements under the implicit finite element framework, the primary characteristic of this finite element model is that the solid-shell element formulation is integrated into an explicit finite element approach.
  4. For major deformation issues like forging and high-velocity impact, an analysis used a thermomechanical total Lagrangian SPH formulation that was better suited to solid mechanics. The work was completed in two steps: (a) developing internal FORTRAN code; and (b) extending a VUEL subroutine (user’s element) for Abaqus users. In actuality, there aren’t many options when it comes to modelling solid materials with SPH. The SPH formulation is present in Abaqus, but it has less utility (Eulerian formulation only). The second contribution will then contribute to better SPH usage in Abaqus.
  5. Long and expensive testing campaigns are required since composite failure phenomena are still complex and result in oversize buildings in many sectors. Numerical methods are a good substitute for reducing sizing costs. The construction of a new zero-thickness interface element is thus presented in this study in order to mimic delamination between layers of volume elements without coinciding nodes. This element is created as a user-defined element so that it can be utilized in an industrial setting and implemented in a piece of commercial finite element software. For this study, a VUEL function was used to define the user-element in Abaqus/Explicit.
  6. In a research, a multi-mechanism model was created for cutting simulations based on the idea of generalized stresses, where the austenite phase fraction is treated as an additional degree of freedom and its first gradient is involved. In this investigation, a novel interpretation of the Ginzburg-Landau equation’s phase gradient was presented, whose derivation is based on the idea that free energy consists of a gradient component and a potential part. The finite element matrix is created using the isoparametric idea for quadrilateral elements and the strong and weak formulations of the model. The integration strategy and local iteration are then introduced. For studying cutting simulations, the model is coupled to the FE-program ABAQUS and implemented as a user-defined element subroutine for explicit (VUEL).
  7. A very effective user-defined finite element created in-house is used to study the load distribution in multi-fastener joints under various loading circumstances and is contrasted against various joint configurations with experimental data. In order to create precise and effective joint models that can take time-dependent loading into account, our one-dimensional analytical spring model for bearing loads was expanded to three dimensions in this study and implemented as a user-defined finite element (VUEL) in Abaqus/Explicit.

Preview

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

You can watch demo here.

Watch Video

Introduction

  • When do you need to use a VUEL Subroutine?
  • What are the uses of this subroutine?
  • How does this subroutine work?
  • How to use a VUEL Subroutine?
  • Where is the subroutine block?
  • Which variable is required and which is optional?
  • What are the variables of subroutines?
  • What are the tips to use VUEL subroutine?

Workshop 1-1: Analysis of a one-element truss structure using VUEL subroutine

  • Problem description
  • Initial equations to write subroutine
  • Calculation of element matrix stiffness
  • Calculation of mass matrix
  • Calculation of internal energy
  • What commands lines should be added in input file for VUEL usage
  • Description of the input file line by line completely
  • Description of flowchart for the subroutine
  • Writing the subroutine line by line
  • Commands for print in the subroutine
  • ABAQUS input file settings
  • Discussion about the results

Workshop 1-2: Analysis of a one-element truss using user-coded external loads

  • Problem description
  • How to define external load via VUEL
  • What is modification in input file for external load via VUEL
  • How to add force in VUEL subroutine instead of GUI
  • Discussion about the results in log file
  • Discussion about the results in visualization

Workshop 1-3: Analysis of multiple truss elements connected in series

  • Problem description
  • Which commands line should be changed for using VUEL subroutines in multiple elements
  • Discussion about the results

Workshop 2: How to use VUEL and VUMAT subroutines in one model

  • Problem description
  • Which command lines should be added
  • Description of the input file line by line completely
  • Discussion about the results
Additional information
Included

.for, .inp, .jnl, .odb, .pdf

Tutorial video duration

120 Minutes

language

English

Level

Advanced

Package Type

Training

Software version

Applicable to all versions

Subtitle

English

Reviews (2)

2 reviews for Introduction to VUEL Subroutine in ABAQUS

  1. Rated 5 out of 5

    Maja Berg – December 22, 2021

    Thanks for the tutorial of this subroutine. I could not find any useful tutorial for the VUEL subroutine before. Please update this package to the new version soon!

    1 product
    • Experts Of CAE Assistant Group – December 22, 2021

      It would be updated soon a few days later to the new version. You can use it for free

      • Experts Of CAE Assistant Group – January 2, 2022

        The final version is now available. You can download it from your dashboard

  2. Rated 4 out of 5

    Anders Karlsson – February 1, 2022

    Thanks for your tutorial. I learned what I needed, although it would be better if there were more examples.
    Do you also teach UEL subroutine?

    1 product
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SKU: AM6950 Categories: Civil Engineering, Mechanical Enginerring, Subroutine Tags: ABAQUS, SUBROUTINE, VUEL

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Introduction to UEL SUBROUTINE in ABAQUS
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Introduction to UEL Subroutine in ABAQUS

Rated 5.00 out of 5
€ 210
UEL stands for User-defined Elements. When you have a finite element analysis that requires an element type that doesn't exist in the Abaqus element library, you must write a UEL subroutine. Or, when you want to define various element shape functions, the UEL would be the best choice. This subroutine is one of the most sophisticated in the Abaqus and is intended for advanced users. With this tutorial package, you can become an advanced user and learn how to write such a complex subroutine. This package contains two workshops: writing a UEL subroutine for a planar beam element with nonlinear section behavior and writing a UEL subroutine for a beam element with specific boundary conditions and loading. Watch Demo
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