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Introduction to umat subroutine
Introduction to umat subroutie abaqus tutorial video writing umat subroutine
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Introduction to UMAT Subroutine

$ 210.00

Introduction to UMAT Subroutine course helps you to learn the process of writing UMAT as quickly as possible with the help of practical examples. All the tips and details that you encounter to write the code are taught in this course and you can implement the material model in the subroutine. Because you may have questions while watching the course, an expert will answer your questions online.

Abaqus tutorial video (*.mp4)
Lecture notes (PDF)
Abaqus workshop files (*.cae, *.inp, *.jnl, *.odb)
Fortran subroutines
15-day money-back guarantee
  Free 24/7 online mentoring

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SKU: 2024-3 Categories: Abaqus, Abaqus Subroutines, Training courses, Tutorial
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Description

Introduction to UMAT Subroutine

In ABAQUS/Standard, the user can implement any general constitutive equations through the interface provided. This is achieved using the user subroutine UMAT. It is utilized when the existing material models in the ABAQUS/Standard material model library do not accurately represent the material’s behavior. These interfaces enable the definition of any proprietary constitutive model of arbitrary complexity. User-defined material models can be applied to any ABAQUS/Standard structural element type, and multiple user materials can be implemented in a single UMAT routine and used together. The implementation of material models in UMAT will be covered in this course, along with illustrative examples.

What is UMAT?

In Abaqus, UMAT stands for “User MATerial“. It is a user-defined subroutine that allows you to define custom material models for use in finite element simulations. With UMAT, you can implement your material behavior laws, such as plasticity, viscoelasticity, damage, and more, by specifying the constitutive equations and material properties.

The UMAT subroutine is written in Fortran and is used to define the material behavior at integration points within the finite element model. It allows for the implementation of complex and specialized material models that are not available in the standard material model library of Abaqus.

By defining a UMAT subroutine, you can extend the capabilities of Abaqus to simulate the behavior of advanced materials or material models specific to your research or industry application. However, it requires a good understanding of material behavior and programming in Fortran.

What you’ll learn

In this Abaqus tutorial video course, you will learn about writing UMAT subroutine in Abaqus, ways to debug the code, and also verification of that.

Upon completion of this course, you will be able to:

  • Write your own material model
  • Choose the proper element type
  • Debugging the code
  • Verification of the code
  • Postprocessing and visualization of the results

Overview of the course

Lecture 1 Introduction to User Material Subroutines

  • Overview of Some User Subroutines
  • Understanding the purpose and capabilities of UMAT subroutines in Abaqus
  • When to use UMAT?
  • UMAT or VUMAT?
  • How to convert UMAT and VUMAT?
  • Our portfolio of coding user material subroutines
  • Quiz 1

Lecture 2 Fortran Programming

  • Basic concepts of Fortran programming language
  • Essential FORTRAN Statements
  • Naming Conventions
  • Learn More
  • Quiz 2

Lecture 3 Material Modeling

  • Brief introduction of material behavior and constitutive modeling, including plasticity, viscoelasticity, damage, and other material phenomena.
  • How to get started?
  • UMAT Interface
  • Including User Subroutines in a Model
  • UMAT Variables
  • UMAT Conventions
  • Formulation Aspects
  • Solution-Dependent State Variables
  • Quiz 3

Lecture 4 UMAT Subroutine Implementation

  • Hands-on training in implementing custom material models using UMAT subroutines, including defining material properties, constitutive equations, and integration within the finite element framework.
  • Example 1: Using More than One User-Defined Material Model
  • Example 2: Elastic/Plastic Material with Kinematic Hardening
  • Example 3: Elastic/Plastic Material with Isotropic Hardening
  • Example 4: 2D Puck Failure Criteria
  • Example 5: Neo-Hookean (NH) Hyperelasticity Model
  • Quiz 4

Lecture 5 Debugging

  • Debugging Techniques and Proper Programming Habits
  • Possible Errors
  • Quiz 5

Lecture 6 Verification and Validation

  • Techniques for verifying and validating user-defined material models through comparison with experimental data or analytical solutions.
  • Single-element model  test
  • Multiple element model test
  • Testing Suggestions
  • Example 6: Rotating cylinder

Lecture 7 Postprocessing VUMAT Subroutine Results

  • Introduction
  • Results Visualization
  • Quiz 6

Appendix 1: Utility Routines

    • Introduction
    • Work with utility routines

 

Knowledge Prerequisites

This course is recommended for engineers with experience using Abaqus.

Available Releases

Abaqus 2024, Abaqus 2023, Abaqus 2022, Abaqus 2021, Abaqus 2020, Abaqus 2019, Abaqus 2018, Abaqus 2017, Abaqus 2016, Abaqus V6.14, Abaqus V6.13, Abaqus V6.12

Duration

5 hours

Discipline

Advanced Abaqus

This course is designed to cover the utilization of the Abaqus user subroutine. However, the course material can also be valuable for modeling various other types of material models. It is aimed at engineers who are involved in the programming of Fortran subroutines and wish to enhance their comprehension of the intricate mechanical behavior associated with complex material models.

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Additional information
Software

Abaqus FEA

Type

Abaqus Training Course

Level

Advanced Abaqus

Files

Abaqus files: *.cae, *.jnl, *.inp, *.odb
Fortran subroutines: *.for
Video: *.mp4
Lecture notes: *.pdf

Language

English

Category

Fortran Programming
Plasticity
Failure & Damage Analysis
Material Modelling

Solver

Standard/Implicit

Material

Metals, Composite, and Hyperelastic materials

Payment & Delivery
All products available on the website come with a guarantee of customer satisfaction. The products can be used immediately after purchase through the download link. There is also online consulting/mentoring for all customer reassurance products.
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Content

Contents

  • Abaqus tutorial video (*.mp4)
  • Lecture notes (PDF)
  • Abaqus workshop files (*.cae, *.inp, *.jnl, *.odb)
  • Fortran subroutines
  • 15-day money-back guarantee
  •   Free 24/7 online mentoring

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