Composite Fatigue Simulation with UMAT Subroutine in ABAQUS (unidirectional)
€ 420.0
The composite fatigue training package completely teaches how to simulate and analyze a fatigue composite model with the help of UMAT Subroutine in Abaqus software. In this training package, we have provided all the files needed for your training, including articles, theories, how to write subroutines, and software settings.
| Expert | |
|---|---|
| Included |
.inps,video files, Fortran files (if available), Flowchart file (if available), Python files (if available), Pdf files (if available) |
| Tutorial video duration |
60 Minutes |
| language |
English |
| Level | |
| Package Type | |
| Software version |
Applicable to all versions |
| Subtitle |
English |
42
People watching this product now!
Frequently Bought Together
Description
Composite Fatigue Abaqus Simulation with Subroutine
In this package, we try to teach you step-by-step, from the theory of the problem to the final results of the simulation on composite fatigue specimens. As you know, to perform this analysis using Abaqus software, we need to use UMAT subroutine writing. To get familiarity with this subroutine, you can purchase the subroutine training package of UMAT and VUMAT through our website. This training package helps you to perform the analysis easily you need in the field of Composite Fatigue Abaqus. Consequently, the following is a detailed description of this workshop. Composite fatigue Abaqus is presented here in this training package.
Introduction to Composite fatigue
Fatigue life is defined as the loading cycle’s number (stress) of a specified character. That is a specimen sustains before happening any kind of failure. We can determine the composite fatigue life by the strain, stress, or energy approach. Due to the increasing growth of science and industry, there is a need to develop advanced materials with more profits. Composite materials, due to higher efficiency and economic benefits, have become a suitable alternative to traditional materials in various industries. Therefore the development of these materials by understanding how to produce and study their properties. How to calculate the final life of fatigue for them is essential. Follow this description to understand the Composite Fatigue Abaqus capabilities and features.
Workshop 1 part 1: Theory
In the first part of this workshop, we first mention the importance of material fatigue. To check for fatigue in composite materials, you need to know how to write subroutines. In the following, we will introduce how subroutine works. The theory that governs this subroutine writing is the theory of “Shokrieh”(for more information, you can refer to this article).
The equations in this theory are based on the “Hashin” criterion. We explained it in this package’s part. In this theory, we have dealt with how to calculate the final
composite Fatigue Life in three dimensions based on the loading cycle’s number.
Workshop 1 part 2: Subroutine writing
In this part, we have presented how to write subroutine UMAT in Fortran language based on the flowchart provided in the initial part to calculate the amount of fatigue and final composite fatigue life (Composite fatigue Umat).
Firstly, the loading method in this example is periodic and based on the number of loading cycles. We calculate the reduction of properties and their effects on the model’s life. In addition, how to define the parameters, define the initial values, and writing the relationships in Fortran code we completely taught.
Due to the fact that composite materials consist of matrix and fiber, similar conditions have been studied separately for fatigue in both material’s parts. You can watch the demo video to understand more about composite fatigue Umat applied in this training package.
Workshop 1 part 3: Implement modelling in Abaqus software
In the last part, we will go to the Abaqus software and explain how to implement the written subroutine on the model designed in the software. The required settings for each module are trained. Finally, this subroutine will be able to display the final composite fatigue life, behavior of the material, including the reduction of elastic properties, strengths along with other parameters such as stress, strain, displacement, fatigue failure criteria in different modes as output. The written subroutine can be used for a variety of complex to simple models.
If you are not familiar with this subroutine, you can see some information about this subroutine in ABAQUS documentation. However, you can get advanced teaching about these types of subroutines by purchasing these two packages “UMAT Subroutine (VUMAT Subroutine) introduction” and Advanced UMAT subroutine(VUMAT subroutine) in ABAQUS package.
If you are working on composites and need some resources about composite FEM simulation click on the composite analysis page to get more than 20 hours of video training packages of composite materials simulation.
In comparison to metals, composites’ damage mechanisms are less well known. Composite materials and structures are susceptible to defects, whether they appear during material processing, component fabrication, or in-service use. Understanding how the damage or defect affects the structural integrity of the composite component is crucial to determining how critical the defect is. If we can somehow determine these damages and tend to them in time, the maintenance cost would be severely decreased. Also, our design will be better and well-optimized.
It’s true that the composite structures have sufficient strength and stiffness but like other structures, they may get damaged during the service. The damages could be caused by impact, low resistance to the service environment, overloading, Staff carelessness, etc.
In-service damages include:
- Impact damage
- Fatigue
- Cracks
- Delamination
- Fiber fracturing
- …
Service flaws in composite structures are typically caused by impact damages. Delamination is the most frequent impact-related damage. Delamination occurs when layers in a laminated composite are split, creating a mica-like structure with a considerable loss in mechanical properties. Delamination is the separation of the laminate at the boundary between two layers as a result of shock, impact, or repeated cyclic pressures. Individual fibers can pull away from the matrix, for instance.
It is the engineer’s duty to analyze the structures and determine the defects and damages so that the structure can keep working properly and lower the cost of maintenance. With the help of Computer-aided engineering (CAE) and finite element method (FEM), you would be able to do this task in the best way possible.
We are here at the CAE Assistant to explain some about composite material damage and introduce some FEM tools to simulate these damages correctly. Also, we will help you out learn how to simulate and analyze your model and structure. With our high-quality education, you can learn how to work with the Abaqus and analyze composite structures. I recommend you read the topics of this training package on the right side of this page and if you have more questions about this package and its content and quality, ask on the live chat on the left side of this page.
Read More: All about fatigue composite
Users ask these questions
In social media, users asked questions regarding fatigue analysis, cyclic loading, composite fatigue, etc. We answered some of them, which you can see below.
I. Long cycle simulation with the ABAQUS
Q: Can we use Abaqus directly to run a long cycle simulation similar to an experiment, or do we need to add a subroutine?
A: Hello,
Depending on your material and formulation for the cycling, you need to use UMAT or USDFLD subroutine to do such a simulation. I can recommend you some tutorial videos for now:
https://www.youtube.com/watch?v=96sfwnvLHkA
https://www.youtube.com/watch?v=Go8entmePiQ
Simulation of Fatigue in Abaqus
Composite Fatigue Simulation with UMAT Subroutine in ABAQUS (unidirectional)
II. Fatigue analysis with UMAT
Q: Hello Abaqus users,
I’m writing UMAT for fatigue analysis. I use direct cyclic step for calculations. My properties depend on N cycles or total time. Do you know how to define the total time step or a number of cycles in UMAT?
Now, I calculate the total time by KINC parameter (increment number). It works fine until my results converge. If not, the total time reset to zero, but the increment number does not. I tried to call TIME(1) and TIME(2), but they just show step time, not the total time.
Abaqus experts, how to address this problem?
A: Hi,
I didn’t understand your question. However, when you want to use a subroutine to simulate fatigue in the composite structures, you define steps, and for each step, you define a specified number of cycles. Then, you can observe the effects of fatigue on material properties in each step.
I recommend checking the link below. You will learn many things about implementing subroutines to simulate composite fatigue.
Composite Fatigue Simulation with UMAT Subroutine in ABAQUS (unidirectional)
Best regards.
III. Fatigue and the number of increments
Q: How to increase the number of step increments in the ABAQUS standard?
The problem is that the ABAQUS has a limit number of 10e7 (one billion) for the number of time increments. Is any way to use more than one billion?
I need it for fatigue analysis.
Thank you.
A: Hi,
I don’t know what method you used for fatigue simulation. However, you can create multiple steps and divide the increments between the steps.
Check the link below. You might find something useful in it.
Simulation of Fatigue in Abaqus
Another recommendation is to write a subroutine (UMAT or VUMAT). You can define the number of cycles you need, define several increments, and assign the cycles to the increments. For example, you have 100 million cycles; then, define 100 increments and assign every 1 million cycles to one increment.
Something like this is done on a composite model in the package that I sent you its link:
Composite Fatigue Simulation with UMAT Subroutine in ABAQUS (unidirectional)
Best wishes.
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/Support@CAEassistant.com/ contact form.
Projects: Need help with your project? You can get free consultation from us here.
To access tutorial video run the .exe file on your personal pc and send the generated code to shop@caeassistat.com 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
Features
16 reviews for Composite Fatigue Simulation with UMAT Subroutine in ABAQUS (unidirectional)
You must be logged in to post a review.
You may also like…
Composite Fatigue Simulation with Subroutine in ABAQUS (unidirectional) for 3D Element
Fatigue in composites refers to the weakening of a material caused by repeatedly applied loads or stress cycles over time. When a composite material is subjected to cyclic loading, small cracks or microdamage can form within the material, which may grow and lead to failure after a certain number of loading cycles. This is a significant consideration in the design and analysis of composite structures, especially in applications subjected to repeated stress, such as in aerospace, automotive, or civil engineering.
In one of our other packages, we have used the UMAT subroutine in Abaqus to simulate fatigue in composites in two-dimensional space. The current project is more comprehensive, as it addresses composite fatigue in both 2D and 3D spaces. So you can use it for the simulation of both shells and solids. In this project, you will first become familiar with simulating composite fatigue in 3D space using the Abaqus UMAT subroutine. Then, we will provide a complete UMAT code along with Abaqus files for extending the simulation to 3D space, enabling the 3D simulation of composite fatigue in Abaqus.
Composite Fatigue Simulation with VUMAT Subroutine in ABAQUS
This training package consists of four chapters that help engineers and researchers in the industry to understand the fundamental concepts and necessary tools for simulating composite fatigue using VUMAT subroutine in ABAQUS. The first chapter provides an overview of the fatigue behavior of composite materials, including the factors contributing to fatigue failure. The second chapter explores the failure mechanisms of composite materials and the types of damage that can occur. The third chapter discusses the effects of fatigue on composite materials, including how it affects the material's properties and performance. Finally, the fourth chapter focuses on using the VUMAT subroutine in ABAQUS for composite fatigue analysis, including the material models and criteria used to simulate the behavior of composite materials under various loading conditions. By mastering the concepts and tools presented in this package, engineers can develop more durable and reliable composite structures that can withstand cyclic loading over extended periods of time.
Simulation of composite Puck damage in 3d continuum element in Abaqus (UMAT-USDFLD-VUMAT)
The Puck criterion is an essential damage model for composite materials, considering both fiber and matrix failures simultaneously. It provides a practical way to predict the onset of damage in composites under various loading conditions. This training package is focused on simulating composite PUCK damage in 3D continuum elements using UMAT, VUMAT, and USDFLD subroutines in Abaqus. It covers different types of failure in composites, including fiber failure, matrix cracking, delamination, and interfacial failure, as well as criteria for predicting failure modes in composites that are dependent or not dependent on each other, such as the Tsai-Wu and Tsai-Hill criterion, respectively. Additionally, the package covers composites' most commonly used damage criteria, including the Puck criterion. The package provides step-by-step guidance on simulating composite Puck damage using each of the subroutines mentioned above in Abaqus.
Simulation of composite Hashin damage in 3d continuum element in Abaqus (UMAT-VUMAT-USDFLD)
In this training package, the 3D continuum HASHIN damage initiation model is prepared via three subroutines (USDFLD, UMAT and VUMAT).This training package teach you subroutines line-by-line. It should be noted that after damage initiation, failure occurs suddenly and in the form of a reduction in properties in the model. The HASHIN theory for this package is based on Kermanidis article titled” FINITE ELEMENT MODELING OF DAMAGE ACCUMULATION IN BOLTED COMPOSITE JOINTS UNDER INCREMENTAL TENSILE LOADING “.
Abaqus Fatigue Tutorial
This Abaqus fatigue tutorial package includes workshops that teach you the XFEM method to simulate crack growth. This tutorial package enables you to model crack propagation in any 2D and 3D dimensional model. In addition, you will learn about the Paris law, direct cyclic approach, traction-separation law, and other theories that help you to simulate a crack growth problem in this package
3D continuum Abaqus HASHIN progressive Damage for composite materials (VUMAT Subroutine)
The Hashin failure criteria is a set of failure criteria developed specifically for composite materials. It predicts different failure modes in composites based on the stresses experienced by their constituents (fiber and matrix). The criteria are widely used in engineering and computational models to assess composite material performance under mechanical loading. The criteria, while highly efficient and widely used, pose challenges when implemented in numerical simulations. Abaqus has emerged as a powerful tool to address these challenges, enabling the prediction of damage initiation and its progression (via stiffness reduction) based on the Hashin criteria. However, a key limitation of Abaqus is its applicability being restricted to 2D plane stress elements. To overcome this limitation, we developed a VUMAT subroutine in this project. This custom subroutine extends the capabilities of Abaqus, allowing for the simulation of damage initiation and propagation in 3D problems in accordance with the Hashin criteria. 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.
A notable point is that in one of our other packages, we also provide training on using Abaqus subroutines to analyze the Hashin criterion. However, in that package, damage occurs instantaneously. In the current package, we have modeled the progressive Damage, which is more complex but could be more beneficial for solving your specific problems.
Tim Wöhler –
very good. I think a team should have made this subroutine because it was so complex.
Experts of CAE Assistant Group –
Thanks.Yes. The CAE Assistant Group wrote this subroutine as a team.
Amanda Diaz –
Hello, CAE assistant team., wonderful package, I used the context of this package for some researches in Fatigue of composite materials Field.
alex-1193 –
Hi, why there are no description for workshops or some preview or pictures of workshops?
Alder-oz –
The step-by-step approach used in this training package makes it easy to understand and follow, from the theory of the problem to the final results of the simulation on composite fatigue specimens.
Dr.Rohit –
It helped me understand some of the basics of writing UMAT subroutine for composite fatigue behaviour
Edmundo –
I’m thrilled with the accuracy and reliability of the fatigue simulations. The insights have been crucial for my analysis. Are there any upcoming updates or new features planned for the package?
Valerio –
The package delivered exactly what I needed for my composite material simulations. I’m interested in learning more about how to fine-tune parameters for specific applications. Any tips?
Albaida –
Fantastic product! The ease of use and detailed results were just what I needed. Can you provide advice on how to integrate this tool with other analysis methods or software?
Jacinta –
The fatigue simulation package has made a significant difference in my project outcomes. I’d like to know if there are any additional modules or extensions that could complement this tool?
Ciro –
Excellent tool with user-friendly documentation. I was able to implement it quickly and effectively. What’s the process for requesting support if I encounter issues with the subroutine?
Quispe –
“This package is a game-changer for my projects. The ability to accurately simulate composite fatigue is invaluable. I’m curious about any additional resources or case studies that could help enhance my understanding further.”
Claudiu –
The composite fatigue simulation package exceeded my expectations! The setup was straightforward, and the results were highly accurate. My only question is: how do I update the subroutine for future versions of Abaqus?
Ion –
Impressive performance! The integration with Abaqus was seamless, and the detailed analysis has helped me optimize my designs significantly.
Ramiro –
Great experience with the composite fatigue simulation package. The results were precise and actionable.
Quispe –
This package is a game-changer for my projects. The ability to accurately simulate composite fatigue is invaluable. I’m curious about any additional resources or case studies that could help enhance my understanding further.
Caridad –
Very satisfied with the results and the support provided. The simulations were highly accurate. How can I access more advanced training or workshops on utilizing the package effectively?