Showing all 23 results

Brittle Damage in Abaqus

 240.0

Brittle materials, such as ceramics, glass, and concrete, break or fracture easily under stress without extensive deformation. Unlike ductile materials, brittle materials snap suddenly, lacking flexibility to rearrange their atomic structure under strain. These materials have low tensile strength but strong compressive resistance, which makes them vulnerable to cracking when stretched or pulled.

Understanding brittle material damage is crucial in safety-critical fields like civil engineering, aerospace, and manufacturing, where unexpected fractures can lead to catastrophic failures. Simulations help engineers predict when and how brittle materials may break, guiding safer design choices. Abaqus, a popular software for these simulations, offers methods like the Johnson-Holmquist (JH) model, XFEM, and energy-based approaches, each suited to different types of loading conditions.

For dynamic, high-strain applications like impacts, the JH model is effective, particularly in Abaqus/Explicit with specific damage parameters. For general crack modeling, XFEM is versatile, allowing cracks to form naturally without predefined paths. The energy-based method is useful for slow-loading scenarios, defining an energy threshold for fracture initiation. Each method requires careful input of material properties, mesh refinement, and load conditions to reveal potential failure points and improve material performance in real applications.

Abaqus Kelvin Voigt Model (Viscoelastic) Simulation Using UMAT and VUMAT Subroutines

 270.0

This research presents a precise three-dimensional mechanical response of viscoelastic materials using Abaqus kelvin voigt viscoelastic model. We performed this kelvin voigt model Abaqus simulation using both UMAT and VUMAT subroutines for standard and explicit solvers.

The behavior of viscoelastic materials is a state between the behavior of a liquid and a solid. In other words, they behave both like liquids and solids. That is to say, there are many natural and synthetic materials that are classified as viscoelastic materials; From the biological structures of the body such as skin, cartilage and tissue to concrete, foams, rubbers, and synthetic polymers. Due to these unique properties, viscoelastic materials have many applications.

In this regard, the primary goals of this study include the development and implementation of an accurate three-dimensional Abaqus kelvin voigt viscoelastic model, and the integration of viscoelastic properties into the analysis, which can improve the prediction of viscoelastic materials response under different boundary and loading conditions.

This tutorial, by customizing the UMAT and VUMAT subroutines to simulate flexible samples behavior, contributes to the advancement of viscoelastic materials design and analysis.

Implementation of Soil Constitutive Models in Abaqus | With a Special Focus on CSJ Models

 240.0

Constitutive model implemented in calculation code, play an important role in the material behaviors prediction. In the field of geotechnical engineering there are numerous soil constitutive models. By installing these models in a finite element code such as Abaqus, their development, efficiency and advancement can be increased. Also, more and more complex engineering problems can be solved by this method. But to do this, you need a proper understanding of the mathematical and programming basics of these models. This tutorial focuses on implementing advanced constitutive models in Abaqus, particularly for simulating soil behavior. Focusing on the CJS model, this tutorial tries to teach how to work and how to program these models in Abaqus code. It includes detailed explanations of VUMAT and UMAT subroutines and practical examples of implementing the CJS model.

3D Simulation of Gurson-Tvergaard-Needleman (GTN) Damage Model

 190.0
The GTN (Gurson-Tvergaard-Needleman) damage model is a robust continuum damage model used to simulate ductile fracture in materials. It accounts for porosity, a key damage parameter, to predict material behavior under various loading conditions. The model's benefits include comprehensive fracture analysis, accurate damage prediction, versatility, and enhanced simulation capabilities. Despite these advantages, implementing the GTN model in software like Abaqus (GTN model Abaqus) is challenging. It is due to the need for custom subroutines, such as VUMAT. However, writing the subroutine requires proficiency in Fortran programming and an understanding of finite element analysis. This project provides a detailed guide for using the VUMAT subroutine to define the GTN model in Abaqus. It addresses challenges like high computational costs and the need for extensive experimental data. The tutorial demonstrates the model's application in material design, failure analysis, structural integrity assessment, research and development, and manufacturing process simulation. By exploring stress distribution, nodal temperatures, and displacement fields, the project aims to enhance the understanding and predictive capabilities of the GTN damage model.

Viscoplasticity Abaqus Simulation Using UMAT Subroutine | Perzyna Viscoplastic Model

 270.0

Viscoplasticity describes the rate-dependent inelastic behavior of materials, where deformation depends on both stress magnitude and application speed. This concept is crucial in many engineering applications, such as designing structures under dynamic loads, modeling soil behavior during earthquakes, and developing materials with specific mechanical properties. Viscoplasticity Abaqus simulation, especially using Abaqus with UMAT subroutines, are vital for understanding, predicting, and optimizing the behavior of viscoplastic materials. This tutorial focuses on implementing the Perzyna viscoplasticity model in Abaqus. The Perzyna viscoplastic model, a strain rate-dependent viscoplasticity model, relates stress to strain through specific constitutive relations. This involves defining plastic strain rate based on stress state, internal variables, and relaxation time. The tutorial provides general UMAT codes for viscoplastic analysis, yielding results like stress fields essential for various engineering applications. These simulations help in predicting permanent deformations, assessing structural failure points, and analyzing stability under different loads, benefiting fields such as aerospace, automotive, civil engineering, and energy.

Composite pressure vessel analysis with Semi-Geodesic winding

 400.0
(12)
Nowadays, pressure vessels are produced using various methods, one of which is filament winding. This package teaches the simulation of composite pressure vessels produced using the filament winding method. Filament winding itself has different methods, and one of the most widely used winding methods for producing composite vessels is the semi-geodesic filament winding method. In this package, first, the semi-geodesic method is described. Then, the simulation of a semi-geodesic vessel is performed using a Python script. Additionally, a UMAT subroutine is used to simulate the failure of composite materials used in the vessel.

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

 320.0
(16)
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.      

Composite Fatigue Simulation with VUMAT Subroutine in ABAQUS

 420.0
(8)
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.

Composite simulation for experts-Part-3

 1340.0
(1)

Pay attention to the syllabus and availability file details. some of the packages are fully available and some of them are partially available. If this is partially available it takes at least two months to be completely available.

If you are a graduate or Ph.D. student, if you are a university professor or an expert engineer in the industry who deals with simulation software, you are definitely familiar with the limitations of this software in defining the material properties, loading or meshing, interaction properties, and etc. You have certainly tried to define the properties of materials based on advanced fracture theories in finite element software and are familiar with their limitations and problems. Now, here is your solution. Start writing subroutines in finite element software and overcome the limitations. With the tutorials in the Golden Package, you will learn how to write 8 subroutines in Abaqus software professionally.

Composite simulation for experts-Part-2

 1460.0
(3)
Pay attention to the syllabus and availability file details. some of the packages are fully available and some of them are partially available. If this is partially available it takes at least two months to be completely available.

If you are a researcher, student, university professor, or  Engineer in the company in the field of composite materials, this training package in simulating these materials in Abaqus software is the best selection. This training package is the second part of the composite for expert package and is focusing on the Simulation of woven composite damage in Abaqus, Composite Fatigue Simulation, Analysis of Composite pressure vessel with Semi-Geodesic winding,  Simulation of composite Hashin damage in 3d continuum element  (UMAT-VUMAT-USDFLD), and  Abaqus composite modeling of Woven & Unidirectional + RVE method.

 

Hardening plasticity in Abaqus

 180.0
(13)
In this package, hardening plasticity in the Abaqus software using Abaqus material models or UMAT subroutine or UHARD subroutine is discussed. It should be mentioned using a subroutine to define hardening could be more professional and this package tries to familiarize users with these subroutines for hardening definitions. So, if you want to write these subroutines for your customized project in the hardening plasticity field, I recommend you the "UMAT Subroutine (VUMAT Subroutine) introduction" and "UHARD Subroutine (VUHARD Subroutine) in ABAQUS".  

Simulation of composite Puck damage in 3d continuum element in Abaqus (UMAT-USDFLD-VUMAT)

 250.0
(18)
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.  

Johnson Cook plasticity and damage simulation

 140.0
(11)
To drive new ideas, we occasionally need to modify the theory of Johnson-equations. Cook's As a result, we learn how to use the Abaqus model for Johnson Cook theory as well as how to create subroutines for this model in this training package. There are already two written subroutines. You will learn how to apply Johnson-Cook progressive damage in the second one after learning how to apply Johnson-Cook plasticity and damage initiation in the first.

Simulation of woven composites damage in Abaqus

 320.0
(1)
Woven composites are net-shaped composite structures that are fully interconnected by their yarns. Like a piece of cloth, the yarns are weaved together as warp and weft to create a composite structure. This package includes several components. First, it begins with an introduction to woven composites. Next, it provides a detailed explanation of macro modeling and offers guidance on how to perform it. The damage criteria employed in this package is a modified version of the Hashin criteria specifically designed for woven composites. Furthermore, the package demonstrates how to model damage using the USDFLD subroutine and Hashin relations. The subroutine is thoroughly explained, line by line, and a workshop is conducted to facilitate learning and practical application. Finally, the subroutine's validity is confirmed through a verification process.

Simulation of woven composite fatigue in Abaqus

 420.0
(2)
The training package focuses on simulating woven composite fatigue using Abaqus software and the modified Hashin fatigue damage model based on the article titled  "Life prediction of woven CFRP structure subject to static and fatigue loading ". Woven composites have high strength and stiffness-to-weight ratios, but the interlacing pattern can affect stress distribution and damage mechanisms, making fatigue analysis crucial. The package includes four lessons covering different types of composite fatigue models, material characterization, generalization of the failure model, and the implementation of the UMAT subroutine. Two workshops provide hands-on experience in implementing the UMAT subroutine on one element in cyclic tension and a complex model. Fatigue analysis predicts material behavior under cyclic loading and helps design safe and reliable structures.

UMAT Subroutine (VUMAT Subroutine) in ABAQUS-Free Version- UMAT Abaqus example

 0.0
(16)
This package includes the free version of the two following packages. The following packages include 11 workshops for writing different types of subroutines and give you instructions and points to write your own UMAT/VUMAT subroutine. Here, a UMAT Abaqus example is free to download.

"UMAT Subroutine (VUMAT Subroutine) introduction" is used 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 the introduction to writing advanced UMAT and VUMAT subroutines in hyperelastic Martials, Composites, and Metal, and so on. Watch Demo

"Advanced UMAT Subroutine (VUMAT Subroutine)" training package helps Abaqus users to prepare complex UMAT and VUMAT subroutines. This training 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

Simulation of composite Hashin damage in 3d continuum element in Abaqus (UMAT-VUMAT-USDFLD)

 250.0
(11)
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 “.

Lemaitre Damage model implementation with VUMAT Abaqus

 250.0
(17)
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.  

Composite simulation for experts-Part-1

 930.0
(18)
If you are a graduate or Ph.D. student, if you are a university professor or an expert engineer in the industry who deals with simulation software, you are definitely familiar with the limitations of this software in defining the material properties, loading or meshing, interaction properties, and etc. You have certainly tried to define the properties of materials based on advanced fracture theories in finite element software and are familiar with their limitations and problems. Now, here is your solution. Start writing subroutines in finite element software and overcome the limitations. With the tutorials in the Golden Package, you will learn how to write 8 subroutines in Abaqus software professionally.

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

 320.0
(20)
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.

Module by module Abaqus Training

 60.0
If you are new to Abaqus software and the topic of finite element analysis, you definitely need to get acquainted with the user interface of this software and the general features of each module. In this software, we perform different simulation steps in the following different modules and at the end, we receive the analysis results from the software solver. In this package, you will learn how to work with the software in each module and perform your simulation in each module properly.

Advanced UMAT Subroutine (VUMAT Subroutine) – Abaqus UMAT tutorial

 240.0
(18)
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

UMAT Subroutine (VUMAT Subroutine) introduction

 190.0
(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