Composite
Fiber-reinforced composites, widely used across various industries, consist of reinforcing fibers embedded in a matrix. During the curing process, this mixture transforms into a stable material. Curing is a critical step to ensure the durability and strength of the final product. In one of our intermediate packages, we used Abaqus to analyze the curing process in composites with linear elastic models. While these models are straightforward and user-friendly, their accuracy is limited because composites exhibit viscoelastic behavior during curing, rather than elastic behavior.
To address this limitation, the current package introduces two more advanced and accurate models for analyzing residual stresses in composites: the viscoelastic model and the path-dependent model. These models offer significantly greater accuracy compared to linear elastic ones but involve added complexity. To simplify this complexity for users, the package begins with a comprehensive overview of the underlying theories and formulations for the viscoelastic and path-dependent models. It then provides detailed guidance on implementing these models using Abaqus subroutines. Finally, workshops are included to demonstrate how the viscoelastic model significantly improves the prediction of residual stresses in composites compared to the elastic models featured in our intermediate package.
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Machine Learning for Composite Materials with Abaqus
This tutorial package delves into an advanced inverse modeling approach for predicting carbon fiber properties in composite materials using a machine learning (ML) technique. Specifically, it covers the use of Gaussian Process Regression (GPR) to build a surrogate model for accurate predictions of fiber properties based on data from unidirectional (UD) lamina. By leveraging Finite Element (FE) homogenization, synthetic data is generated for training the GPR model, accounting for variations in fiber, matrix properties, and volume fractions. This framework’s efficiency and accuracy are validated using real-world data, highlighting its potential as a computational alternative to traditional experimental methods. The package includes detailed explanations, case studies, and practical exercises, equipping users with hands-on experience in applying this ML-based approach to composite material analysis.
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An Efficient Stiffness Degradation Composites Model with Arbitrary Cracks | An Abaqus Simulation
Composite materials are critical in high-performance applications due to their exceptional strength-to-weight ratios and customizable properties. They are widely used in aerospace, automotive, and civil engineering. However, their complex structure makes them susceptible to various damage mechanisms, such as tunnel cracking and delamination, which can significantly affect their structural integrity. Accurate damage prediction is essential for effective use and maintenance. Traditional methods often rely on extensive experimental testing, but finite element analysis (FEA) has become a valuable alternative. Abaqus is particularly effective for modeling composite damage due to its comprehensive material modeling and customizable subroutines. The research presented utilizes Abaqus to develop a model for predicting Stiffness Degradation Composites laminates with arbitrarily oriented cracks, offering valuable insights into damage progression and stiffness loss under various loading conditions. To achieve this, UEL, UMAT, and DISP subroutines are used. Additionally, a Python script is provided to import the model into Abaqus.
MASTER COMPOSITE SIMULATION IN ABAQUS
In this comprehensive online course, you'll explore composite material modeling using Abaqus software. We’ll guide you through the process of creating precise finite element models for various composites, including unidirectional, woven, and chopped fiber configurations. You'll also learn to model different types of damage within these composites, including wood composites like balsa wood.
But the course goes further, equipping you to develop custom material models and damage functionalities using subroutines that build on Abaqus' built-in capabilities, such as 3D continuum, Hashin, and Puck models. Additionally, you'll delve into simulating curing and fatigue behavior in composites, applying these advanced techniques for more accurate analysis.
Advanced Finite Element Analysis of Off-Axis Tunnel Cracking Laminates
The project investigates off-axis oriented tunnel cracking laminates. It focuses on cracks growing at an angle to the primary fiber direction in layered laminates. By examining factors such as ply thickness, crack spacing, and material properties, the study analyzes how these elements influence the energy release rate and mode mix during crack propagation. The project employs Abaqus CAE, along with UEL and UMAT subroutines, to model and analyze these cracks. It offers comprehensive insights into crack growth mechanics under various loading conditions. Moreover, a Python script is used to automate the entire simulation process. It handles tasks such as geometry creation, defining model properties, setting boundary conditions, generating and modifying input files, and post-processing. So, it enables us to calculate crack profiles and energy release rates. The project benefits researchers, engineers, academics, and industry practitioners by providing valuable methodologies and insights into the behavior of composite materials.
Pultrusion Crack Simulation in Large-Size Profiles | Pultrusion Abaqus
Pultrusion is a crucial task for producing constant-profile composites by pulling fibers through a resin bath and heated die. Simulations play a vital role in optimizing parameters like pulling speed and die temperature to enhance product quality and efficiency. They predict material property changes and aid in process control, reducing reliance on extensive experimental trials. However, simulations face challenges such as accurately modeling complex material behaviors and requiring significant computational resources. These challenges underscore the need for precise simulation methods to improve Pultrusion processes. This study employs ABAQUS with user subroutines for detailed mechanical behavior simulations, including curing kinetics and resin properties. Key findings include insights into crack formation (pultrusion crack simulation), material property changes, and optimization strategies for enhancing manufacturing efficiency and product quality. This research (pultrusion Abaqus) provides practical knowledge for implementing findings in real-world applications, advancing composite material production.
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Short fiber composite damage (Mean Field Homogenization Model)
Short-fiber reinforced thermoplastics, popular due to their strength, lightness, and cost-effectiveness, are often manufactured using injection molding to create complex parts with dispersed short fibers. However, failure in these materials is complex, involving mechanisms like fiber cracking and plastic deformation. Current models for damage and failure are either macroscopic or simplified.
A new method tackles this challenge by evaluating stiffness using continuum damage mechanics with a multistep homogenization approach. This new method is called “Mean Field Homogenization”. This approach involves a two-stage process: first, the fibers are split into groups (grains). Then, mean-field homogenization is employed within Abaqus using a UMAT subroutine to average stiffness across these phases, followed by overall homogenization. This use of mean-field homogenization Abaqus simplifies the modeling of the composite's intricate geometry.
The method was validated through testing on a distal radius plate. Calibration was achieved through experiments, and the simulation was performed using Abaqus finite element software. It's important to note that the Abaqus short fiber damage mean field homogenization process was implemented within Abaqus through the INP code.
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Curing process simulation in Abaqus
Fiber-reinforced composites have found widespread use across various fields due to their remarkable properties. This necessitates a careful design of their manufacturing processes to attain industrial application quality. The critical factor influencing their quality is the curing process, wherein the resin transforms into a solid state under temperature cycles. However, the challenge lies in achieving optimal curing quality while maintaining production efficiency. To overcome this challenge, an effective approach involves utilizing numerical simulations to optimize temperature cycles during curing. Nonetheless, creating such a model is complex as it must consider multiple factors concurrently, including temperature release from chemical reactions, shrinkage strains, and stress resulting from temperature variations, topics covered in this package. The package begins with an introduction to fiber-reinforced composites, exploring their advantages, applications, and categorization. It guides you through the fabrication process, detailing curing techniques and associated challenges. Furthermore, the package introduces constitutive equations for simulating the curing process and the necessary Abaqus subroutines for implementation. Additionally, two practical workshops are included to offer experience in modeling the curing process with Abaqus. These workshops enable you to evaluate internal heat generation and analyze strain and stress distributions. They not only provide guidance on simulation and subroutine implementation but also are provided for verification purposes.
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Damage Properties of Thermoplastic Polymers with UMAT Subroutine
Thermoplastic polymers are materials composed of long molecular chains primarily consisting of carbon. These polymers possess the unique ability to be shaped and molded under heat and pressure while retaining their stability once formed. This high formability makes them widely used in various industries, including furniture production, plumbing fixtures, automotive components, food packaging containers, and other consumer products. This package introduces a thermodynamically consistent damage model capable of accurately predicting failure in thermoplastic polymers. The implementation of this model is explained through the use of an ABAQUS user material (UMAT) subroutine.
The package is structured as follows. The introduction section Provides an overview of thermoplastic polymers and their mechanical properties. In the Theory section, the constitutive damage model and its formulation are reviewed. Then, an algorithm for numerically integrating the damage constitutive equations is presented in the Implementation section. In the UMAT Subroutine section, a detailed explanation of the flowchart and structure of the subroutine is provided. Finally, two simulation examples, namely the T-fitting burst pressure test and the D-Split test, are performed and the obtained results, are investigated.
Notice: Software files and A full PDF guideline (Problem description, theory, ...) are available; Videos are coming soon.
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Low-Velocity Impact simulation
Low-velocity impact refers to the collision between objects at relatively low speeds. While the impact energy may be lower compared to high-speed impacts, low-velocity impacts can still cause significant damage and deformation. Assessing the effects of low-velocity impact is crucial for various industries to ensure the structural integrity, safety, and performance of their products. For example, in the automotive industry, understanding the response of vehicles to low-velocity impacts is essential for designing crashworthy structures and improving occupant safety. In aerospace, assessing the impact resistance of aircraft components, such as fuselage panels or wings, helps ensure their ability to withstand ground handling incidents or bird strikes. In this package, you will learn how to do low-velocity impact simulations with several practical examples.
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UHPFRC (Ultra-High-Performance Fiber Reinforced Concrete) structures in Abaqus
UHPFRC (Ultra-High-Performance Fiber Reinforced Concrete) structures have emerged as a groundbreaking innovation in construction. These structures offer exceptional strength, durability, and performance, revolutionizing the industry. UHPFRC incorporates a precise combination of Portland cement, fine aggregates, admixtures, and steel or synthetic fibers, resulting in an extraordinarily dense and robust composite material. With compressive strengths exceeding 150 MPa, UHPFRC structures exhibit enhanced resistance to cracking, increased load-bearing capacity, and improved durability against environmental factors such as corrosion and freeze-thaw cycles. The superior mechanical properties of UHPFRC enable the design of slimmer and lighter elements, leading to reduced material consumption and more sustainable construction practices. UHPFRC structures find applications in various fields, including bridges, high-rise buildings, marine structures, and precast elements, offering long-term performance and contributing to the advancement of modern construction. In this package, you will learn how to simulate these structures with many practical examples.
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High Velocity Impact Simulation
High-velocity impact refers to the collision between two bodies at extremely high speeds, typically involving projectiles and targets. It is a phenomenon of great interest in various fields, including defense, aerospace, and automotive industries. High-velocity impact simulation in Abaqus is a computational approach used to analyze and predict the behavior of materials and structures subjected to such impacts. Abaqus, a powerful finite element analysis software, enables engineers and researchers to model and simulate the complex interactions between impacting bodies, accurately predicting factors like stress, strain, deformation, and damage. By simulating high-velocity impacts in Abaqus, engineers can gain valuable insights into the performance and integrity of materials and structures, ultimately aiding in the design of safer and more resilient systems. In this package, you will learn how to do these simulations in many practical examples.
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Composite Pressure Vessel simulation in ABAQUS
Pressure vessels are made using different methods today, and one of them is filament winding. This package shows the simulation of composite pressure vessels made using the filament winding method.
In this training package, three winding methods, planar, geodesic, and isotensoid, have been taught for filament winding pressure vessels. In this tutorial, two general methods also have been presented for simulating filament wound pressure vessels. One uses the Abaqus graphical user interface(GUI), and the other uses the Python script. On the other hand, two criteria, Tsai-Hill and Puck, have been used to model damage in the composite. A UMAT subroutine has been used to use the Puck criterion.
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Composite pressure vessel analysis with Semi-Geodesic winding
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.
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Full Composite fatigue Add-on (Academic and industrial usage)
This package is designed to instruct users on how to utilize the composite fatigue modeling Add-on, which removes the need to write a subroutine for composite fatigue modeling. Instead, users can select the composite type, input material properties, and generate the subroutine by clicking a button. The Add-on includes four types of composites, and the generated subroutine for all types is the UMAT. These four types are Unidirectional, Woven, short fiber composites (chopped), and wood. The fatigue criteria used for each type are the same as its respective package. For example, the fatigue criteria for woven composites are identical to that used in the "Simulation of woven composite fatigue in Abaqus" package. This Add-on provides a simple graphical user interface for composite fatigue modeling, which can be utilized for both academic and industrial applications.
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Full Composite damage Add-on (Academic and industrial usage)
This package will teach you how to use the composite damage modeling Add-on. The Add-on eliminates the need for writing a subroutine for composite damage modeling. Instead, you only need to select the desired composite type, input the material properties, and click a button. The Add-on will then generate the subroutine for you. The Add-on includes four types of composites: Unidirectional, Woven, short fiber composites (chopped), and wood. The generated subroutine for all types is the VUSDFLD. The damage criteria used in each type is the same as the one used in its respective package. For instance, the damage criteria for the woven composite is identical to the one used in the "Simulation of woven composite damage in the Abaqus" package. This Add-on offers a user-friendly graphical user interface for composite damage modeling, which can be used for academic and industrial purposes.
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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.
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Composite simulation for experts-Part-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 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.
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Composite simulation for experts-Part-2
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.
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Masonry wall Abaqus simulation
The term masonry can refer to the construction materials brick, stone, etc. An assembly of masonry units, such as concrete blocks, burnt clay bricks, sundried bricks, stone bricks, and natural stones, linked together with mortar or grout is referred to as a masonry wall. It is important to know how these structures behave under different loading conditions, such as explosion, tension, earthquake, etc. to have the best design. In this package, you’ll learn all of that in four workshops: Behavior of a masonry wall under a couple Eulerian-Lagrangian explosion, micro modeling of a masonry wall, modeling of reinforced bricks masonry beams using GFRP reinforcement, earthquake simulation over masonry wall.
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Geostatic Relates to the pressure exerted by the earth or similar substance. Total stress at a point due to the combined weight of the soil or rock (solids plus water) and the load on the foundation is called Geostatic stress. Geostatic analysis is used in cases such as earthquakes, designing a dam, analyzing the foundation of a structure, etc. In this package, three workshops are presented to learn the Geostatic analysis: The first workshop analyzes a water column broke under the weight of gravity, the second workshop simulates an earthquake load over a gravity dam in contact with water and dirt, the last workshop models cylindrical tank's water sloshing phenomenon.
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A mathematical model called the Mohr-Coulomb theory describes how brittle materials, such as concrete or rubble piles, react to both shear stress and normal stress. This rule is followed by the majority of traditional engineered materials in at least some of their shear failure envelope. In this package, you will learn how to use this theory in four practical examples: Analysis of surface explosion damage to an underground box tube in ABAQUS, dynamic analysis of a tunnel in soil subjected to internal blast loading, An internal explosion-related numerical simulation of the behavior of a pipeline's damage mechanics, and for cases utilizing crashworthiness, simulate an Eulerian method to soil impact analysis.
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Steel materials are everywhere and used in almost every structure, from the building you live into the car you drive. Therefore, it’s essential to know the steel properties and behaviors when it’s under different loading conditions such as compression, tension, cyclic load, impact, etc. moreover, knowing the damage mechanism of steel structures helps to have better designing. In this tutorial package, you will learn how to analyze steel structures when they’re damaged with practical examples. There are five workshops here that could teach you the damage mechanism of steel structures: Simulation of bolt failure on the steal beam, reinforced concrete containment damage mechanism under internal explosion, tensile test of a steel specimen, impact on ceramic plate reinforced by steel plate, water jet cutting simulation.
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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.
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