SUBROUTINE
Simulation of SMA in Abaqus with UMAT
Shape-memory alloys (SMAs) have the ability to recover their original shape, thanks to the shape-memory effect and superelasticity. These unique characteristics have led to the broad usage of SMAs in engineering and medical applications. Simulations offer cost-effective methods for analyzing SMAs’ behavior, ultimately enhancing their reliability and performance. Consequently, researchers frequently employ simulations to investigate SMA-based systems. This educational package begins by exploring the fundamentals of SMA wires, presenting their various types and specific capabilities. It then provides the necessary constitutive equations to describe the behavior of SMAs in simulation. The package includes a flowchart and a step-by-step guide for writing a subroutine to model SMAs in Abaqus. Users will also discover a workshop that uses Abaqus to simulate the superelasticity effect in SMA wires. This workshop not only offers guidance on the simulation and the implementation of the subroutine, but also compares the result with an analytical solution for verification.
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 “.
Lemaitre Damage model implementation with VUMAT Abaqus
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.
Introduction to VUEL Subroutine in ABAQUS
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.
Composite simulation for experts-Part-1
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.
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)
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.
Introduction to USDFLD and VUSDFLD Subroutine
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.
Abaqus DLOAD Subroutine and VDLOAD Subroutine
This training package helps Abaqus users to prepare complex DLoad and VDLoad subroutines. With the help of these workshops, you can get acquainted with the basic and comprehensive way of DLoad and VLoad subroutine writing and their applications. By viewing this package as an engineer, you can do basic projects with complex loads.
Module by module Abaqus Training
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.
Introduction to VFRICTION and VFRIC Subroutines in ABAQUS
This tutorial help you in cases where the classical Columbian equations are more complex and cannot be implemented by the graphical ABAQUS environment. This package introduces and teaches how to write these two subroutines. This introduction contains explaining different optional and mandatory parameters of VFRICTION and VFRIC subroutines.
Composite Fatigue Simulation with UMAT Subroutine in ABAQUS (unidirectional)
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.
Advanced UMAT Subroutine (VUMAT Subroutine) – Abaqus UMAT tutorial
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
Introduction to UEL Subroutine in ABAQUS
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
UMESHMOTION subroutine in ABAQUS
If you want to define motion for mesh nodes, you must use the UMESHMOTION subroutine. This subroutine helps you to specify Mesh Motion constraints during adaptive meshing. In this tutorial package, you will learn when you need to use the UMESHMOTION subroutine and how to use it. This package contains three workshops: “writing UMESHMOTION subroutine in forming process”, “writing UMESHMOTION subroutine in rolling process”, and “Tread wear simulation via UMESHMOTION”. The Archard model is used in the wear process, which is very popular in academic and industrial projects.
UAMP subroutine (VUAMP subroutine) in ABAQUS
This package introduces UAMP and VUAMP subroutines in Abaqus. The UAMP and VUAMP refer to User-Defined amplitude. In Abaqus, load amplitude refers to the time-varying function that defines the magnitude and pattern of a load applied to a model during analysis. This amplitude can be defined using predefined amplitude functions or by creating a user-defined amplitude using the UAMP or VUAMP subroutines. The load amplitude can be applied to various types of loads including force, pressure, displacement, and temperature, allowing for a wide range of loading scenarios to be simulated in the analysis. The load amplitude plays a critical role in determining the response of the model over time. The UAMP and VUAMP subroutines can be determined by a mathematical time-dependent function or using sensor values that are defined by the user in analysis. In Abaqus, sensors are used to monitor and extract data from a simulation during its execution. In this package, you will learn all about the UAMP and VUAMP subroutines, all of their variables, how to work with them, their differences, and other things along with educational workshops to help you understand working with these subroutines.
HETVAL is a user subroutine specifically developed to address the limitations of Abaqus in accurately handling volumetric heat flux resulting from internal heat generation within materials. The subroutine’s functionality depends on factors such as time, temperature, or evolving state variables, stored as solution-dependent variables. Accordingly, it can tackle scenarios involving phase changes during simulations. Moreover, the subroutine allows the integration of kinetic theory to account for phase changes associated with internal heat release, such as predicting crystallization in polymer casting processes. Such a multi-functional subroutine finds applications in heat transfer analyses, coupled thermal-electric studies, or temperature-displacement analyses. In this package, our primary goal is to provide valuable insights into the HETVAL subroutine and its diverse applications. Afterward, through a series of comprehensive workshops, we will guide participants in utilizing HETVAL under various conditions. In the final workshop, a problem will be presented, allowing you to explore a realistic example and gain hands-on experience in simulating the curing process within fiber-reinforced composites using HETVAL. Furthermore, to assist those unfamiliar with fiber-reinforced composites, we have included an introductory lesson covering their applications, significance, and an explanation of the importance of accurately simulating the curing process. By completing this package, you will have gained a comprehensive understanding of utilizing HETVAL across various conditions and scenarios. Moreover, you will have acquired the ability to simulate the heat generated during the curing process of fiber-reinforced composites, demonstrating a real-world application of HETVAL.
UHARD Subroutine (VUHARD Subroutine) in ABAQUS
UHARD stands for user-defined hardening models. For isotropic plasticity or combined hardening models, UHARD is a user subroutine to define the yield surface size and hardening parameters. In this tutorial package, you will learn when you need to use this subroutine first; Next, how to use the UHARD & VUHARD subroutine; After that, the difference between the UHARD & VUHARD subroutines and last, there will be four workshops to teach how to use them in action. The workshops are: Implementation of UHARD Subroutine for isotropic hardening (formulation based) in a simple model, Deep Drawing simulation with VUHARD Subroutine or isotropic hardening Data-based with element removal, Simulation of material under pressure with UHARD Subroutine as internal subroutine combined with UMAT, and Simulation of incremental forming with VUHARD Subroutine Dharmasena modified Based.
DFLUX Subroutine (VDFLUX Subroutine) in ABAQUS
DFLUX subroutine (VDFLUX Subroutine) is used for thermal loading in various body flux and surface flux states in heat transfer and temperature displacement solvers when flux load is a function of time, place, or other parameters. In this package, you will learn “when do you need to use this subroutine?”, “how to use the DFLUX subroutine”, “what is the difference between DFLUX & VDFLUX?”, “how to convert DFLUX to VDFLUX and vice versa?”, and “How to use it in an example?”. Three workshops are presented so you can learn all these stuff in action: Simulation of welding between two plate with DFLUX subroutine, Simulation of Arc welding between two tube with DFLUX, and Simulation of different types of functional heat flux(Body-surface-Element) in plate with Johnson-cook plasticity with VDFLUX subroutine(Thermomechanical Analysis).
