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USDFLD AND VUSDFLD SUBROUTINES in ABAQUS
USDFLD AND VUSDFLD SUBROUTINES in ABAQUS
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HomeDynamic Analysis Introduction to USDFLD and VUSDFLD Subroutine
Produced in Partnership Plan

Introduction to USDFLD and VUSDFLD Subroutine

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

€ 170,00

In this usable tutorial, the material properties can change to an arbitrary dependent variable. One of the most important advantages of this subroutine is simplicity and applicability. Various and high usage examples are unique characteristics of the training package.

This training package includes 5 workshops that help you to fully learn how to use USDFLD and VUSDFLD subroutines in Abaqus software. By means of these subroutines, you will have expertise redefine field variables at a material point by the solution dependence of standard and explicit respectively.

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Categories: B-Grade Abaqus, Civil Engineering, Cohesive, Composite, Dynamic Analysis, Explosion, Fatigue, Fracture/Failure, Mechanical Enginerring, Subroutine Tags: ABAQUS, Cohesive, Damage, explosion, fatigue, FORTRAN, getvrm, hashin, khoramishad, SUBROUTINE, SUBROUTINES, USDFLD, vgetvrm, VUSDFLD
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  • Description
  • Additional information
  • Reviews (2)
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Description

Introduction to USDFLD and VUSDFLD Subroutine

Using USDFLD and VSDFLD enables you to simulate models in which the properties of their materials are related to some parameters or conditions. For example, modeling an adhesive joint whose cohesive damage properties are related to a parameter that is not in Abaqus GUI. Analyzing soil that the elastic modulus is related to its depth is a practical example. You will learn how to code these two subroutines as well as the differences between them. In addition, you will be able to change one of them to another one. To sum up, using this subroutine there will be no limitation for you to simulate models containing variables function to other parameters. In addition, we explain how to get access to the interfaces of subroutines, essential settings in GUI, getting familiar with each subroutine’s parameters, etc.

USDFLD and VSDFLD have a very broad scope, and in general, you can use these two subroutines whenever you a parameter in the software material environment that you want to rely on another variable. The difference between the two subroutines is in their solver, where Abaqus standard and Abaqus Explicit solvers use USDFLD and VUSDFLD, respectively. You will learn about how to connect Abaqus and subroutine as well as an overview of subroutine writing in Abaqus.

Workshop 1 Simulation of elastic properties of soil in different depth with USDFLD subroutine :

In this workshop, we will use a simple example to use the USDFLD subroutine. We compare two Abaqus GUI and subroutine methods for simulating soil with changing modulus of elasticity at different depths under compressive loading. At last, we compare the results in both models.

Workshop 2 analyzing a crack path in Spherical FGM:

We will model a functionally graded material (FGM) with a crack on its spherical geometry in this workshop. The USDFLD subroutine is used since we wanted to simulate this by the Abaqus standard. In this model, pressure is applied from the inner part of an empty sphere, and the distribution of stress in this sphere is discussed. Further, the XFEM method is used to define the material for crack and to locate a crack in the Interaction module. In this exercise, we’ve also discussed parameters related to crack analysis and finally checked the results.

Workshop 3 composite shell plane explosion with a sticky connector in the layers:

In this workshop, the main subject is to use the VUSDFLD subroutine to damage an explosive structure as we used Abaqus Explicit solver. In this model, we show how to use the VGETVRM subroutine in the VUSDFLD subroutine. Furthermore, we explain utterly how to define different possible conditions based on damage numbers in subroutines of the VUSDFLD. Finally, view the deflection results and other variables in composite layers.

Workshop 4 Fatigue Cohesive analysis of two AL specimens in the adhesive single lap joint:

we will use the VUSDFLD subroutine at this workshop to simulate fatigue cohesive in a single lap adhesive joint. The evolution of the damage and the cohesive damage are described in full. It is noteworthy that we used the Benzeggagh-Kenane Fracture Criterion relationship for progressive damage as well.

Preview

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

You can watch demo here.

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Introduction

  • When do you need to use?
  • How to use USDFLD and VUSDFLD Subroutines?
  • What is the difference between USDFLD and VUSDFLD Subroutines?
  • How to convert USDFLD and VUSDFLD and vice versa?
  • How to use in example step by step
  • How to verify the subroutine with ABAQUS Software?

Workshop 1: Simulation of elastic properties of soil in different depth with USDFLD subroutine

  • How to use USDFLD subroutine in a simulation?
  • How to connect subroutine to Abaqus software?
  • What is the benefit of using a subroutine?
  • How to relate soil elastic modules to its depth?

Workshop 2 analyzing a crack path in Spherical FGM

  • How to analyze a n FGM model?
  • How to define a formula in the USDFLD subroutine?
  • How to relate material property of a sphere to its radius?
  • Verify the subroutine and export results from visualization module in ABAQUS

Workshop 3: Composite shell plane explosion with a sticky connector in the layers.:

  • How to define material property in varying criterion status?
  • How to use the VGETVRM inner subroutine?
  • How to define cohesive properties while using subroutines?

Workshop 4: Fatigue Cohesive analysis of two AL specimens in the adhesive single lap joint

  • How to write a subroutine for the evolution of the damage and the cohesive damage?
  • How to create fatigue cycles in each step?
  • How to omit damaged cohesive element in a single lap joint?
Additional information
Expert

Produced in Partnership Plan

Included

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

Tutorial video duration

120 Minutes

language

English

Level

Advanced

Package Type

Training

Software version

ABAQUS 6.12

Subtitle

English

Reviews (2)

2 reviews for Introduction to USDFLD and VUSDFLD Subroutine

  1. Rated 5 out of 5

    cheng uangli – July 28, 2021

    The workshops in this package were so rich. I could not find them somewhere else.

  2. Rated 4 out of 5

    wang zhang – August 1, 2021

    I am a mechanical engineer and I bought this package. I learned a lot from this package include modeling and simulating FGM and fatigue in various situations.
    Thanks CAE Assistnat Team!!

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Teaching Plan

Subroutine Introduction

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Writing some Advanced USDFLD/VUSDFLD Subroutines

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