John Garcia is a highly skilled professional with expertise in writing various types of subroutines in Abaqus. He has made significant contributions to the field of computational mechanics and has a deep understanding of finite element analysis. With his exceptional programming abilities and extensive knowledge of Abaqus, John has emerged as a leading expert in the industry.

Early Life and Education:
Born and raised in a small town in the United States, John developed an early interest in mathematics and computer programming. He excelled in his academic pursuits and earned a Bachelor’s degree in Mechanical Engineering from the prestigious Massachusetts Institute of Technology (MIT). During his undergraduate years, John was drawn to the field of computational mechanics, which fueled his passion for developing innovative solutions using advanced numerical methods.

Career and Professional Accomplishments:
After completing his education, John joined a renowned engineering consultancy firm, where he quickly established himself as a valuable asset. His expertise in programming and finite element analysis caught the attention of industry leaders, and he was soon working on challenging projects in the aerospace, automotive, and civil engineering sectors.

John’s career reached new heights when he started specializing in writing subroutines for Abaqus, the industry-leading finite element analysis software. His ability to develop customized subroutines for complex simulations became his trademark. His subroutines enabled engineers to perform advanced analyses, such as material modeling, contact mechanics, and dynamic simulations, with improved accuracy and efficiency.

To further enhance his knowledge and stay at the forefront of the field, John pursued a Master’s degree in Computational Mechanics from Stanford University. His research focused on the development of advanced constitutive models and their implementation in Abaqus subroutines. His work received accolades and was published in reputable journals, solidifying his reputation as an expert in the field.

Expertise and Contributions:
John’s expertise lies in writing different types of subroutines in Abaqus, including user-defined material models, element types, and boundary conditions. He possesses an in-depth understanding of the Abaqus scripting interface, Fortran, and Python programming languages, enabling him to create robust and efficient subroutines tailored to specific engineering problems.

Throughout his career, John has collaborated with numerous clients and engineering teams, providing them with his expertise and support. His ability to grasp complex engineering challenges, translate them into mathematical models, and implement them within the Abaqus framework has been instrumental in solving critical problems and optimizing designs.

John is also a passionate educator and has conducted workshops and training sessions on Abaqus programming. His ability to explain complex concepts in a clear and concise manner has made him a sought-after instructor in the field. He believes in sharing his knowledge and empowering others to leverage the full potential of Abaqus for their engineering projects.

Personal Life:
Outside of his professional endeavors, John enjoys spending time with his family and exploring the great outdoors. He is an avid hiker and finds solace in nature, which helps him maintain a balanced perspective and fuels his creativity. John is also passionate about giving back to the community and actively volunteers in organizations that promote STEM education for underprivileged youth.

Conclusion:
John Garcia ‘s expertise in writing different types of subroutines in Abaqus, combined with his educational background and professional accomplishments, has made him a highly respected figure in the field of computational mechanics. His ability to develop custom solutions, his dedication to knowledge sharing, and his commitment to empowering others have solidified his position as a leading expert. Through his contributions, John continues to push the boundaries of what is possible in the realm of finite element analysis, making a profound impact on engineering practices and enabling innovative solutions to complex engineering problems.

Showing all 18 results

DISP and VDISP Subroutines in ABAQUS

 120.0
(2)
In a very simple form, DISP and VDISP subroutines are used to define user-defined boundary conditions. For example, when you need to define a boundary condition to be time-dependent, location-dependent, or even both, you should use the DISP and VDISP subroutines. ABAQUS features cannot be sufficient for problems with location-dependent and time-dependent boundary conditions simultaneously. In these cases, this subroutine can be useful to solve the challenges. In This package, you will understand the usages of these subroutines and how to work with them in three conceptual and simple workshops.

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

Introduction to VUEL Subroutine in ABAQUS

 210.0
(3)
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.

Introduction to USDFLD and VUSDFLD Subroutine

 170.0
(15)

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

 120.0
(5)
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.

UHYPER Subroutine in ABAQUS

 70.0
(2)

This tutorial teaches you how to define the strain energy of hyperlastic isotropic materials dependent on the field variable or state variable. This Training package including mandatory and optional parameters, and the results of the Subroutine for verification are compared with the ABAQUS results.

Introduction to VFRICTION and VFRIC Subroutines in ABAQUS

 130.0
(3)

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.

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

Introduction to UEL Subroutine in ABAQUS

 210.0
(19)
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

 240.0
(15)
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

 250.0
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 subroutine in ABAQUS

 210.0
(9)
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

 140.0
(10)
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

 180.0
(18)
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).

UVARM subroutine in ABAQUS

 75.0
(9)
"UVARM subroutine  in ABAQUS" package teaches how to specify user-defined output variables at all material calculation points of elements for academic and industrial projects.

UEXPAN and VUEXPAN Subroutine

 120.0

In this tutorial, how to define increments of thermal strains, in order to model thermal expansion, is taught. The implementation of thermal expansion in model is done with UEXPAN and VUEXPAN subroutines for Abaqus/Standard solver (implicit method). In user subroutines UEXPAN or VUEXPAN, the increments of thermal strains can be defined as functions of predefined field variables, temperature, and state variables.

UEXPAN and VUEXPAN are called for all integration points of part elements where the definition of material or gasket behavior includes user-subroutine-defined thermal expansion.

The subroutines are used when the material’s thermal expansion behavior is too complex to model with the "EXPANSION" option in the Abaqus software environment. For example, the subroutines are used in problems where the thermal strains are complexly dependent on temperature, predefined field variables, and state variables, and there is a need to update these variables.

The user subroutine UEXPAN is called twice per element point in each iteration during coupled thermal-electrical-structural or coupled temperature-displacement analyses.

UGEN Subroutine in ABAQUS

 100.0

This tutorial is given the shear and bending forces as the output of the subroutine where the shell mechanical behavior is nonlinear and can only be presented on the basis of general terms of the shell matrix and such behavior is not present in the ABAQUS graphical environment.

UMATHT Subroutine in ABAQUS

 180.0
UMATHT stands for User Material Heat Transfer. This subroutine is used to define a material's thermal behavior. When you have a thermal analysis and want to define the material's behavior and properties, which the Abaqus CAE cannot support, you need to use the UMATHT subroutine. This subroutine needs to define different variables, including the internal thermal energy per unit mass, the variation of internal thermal energy per unit mass with respect to temperature, etc. In this package, you will learn what the UMATHT subroutine is? When do we need to use it? And how it works, with some examples.