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tunnel cracking laminates

Advanced Finite Element Analysis of Off-Axis Tunnel Cracking Laminates

€ 0.0
(5)
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.
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bolting steel to concrete

Bolting Steel to Concrete in Composite Beams: ABAQUS Simulation Validated Against Experiments

€ 140.0
Composite beams with welded stud shear connectors pose challenges in terms of disassembly and reuse, which impacts their sustainability. By bolting steel to concrete, we can aquire a more sustainable alternative, facilitating easier disassembly and reuse. Engineers value concrete-steel bolted shear connections for their fatigue resistance, secure connections, and ease of disassembly. These factors make them suitable for various applications. Proper design is crucial for these connections to ensure effective shear force transfer and durability. This project provides valuable insights into analyzing bolted concrete-steel connections. It helps utilizing advanced modeling techniques in ABAQUS to simulate their behavior under different loading conditions. By addressing the benefits and challenges of experimental and numerical methods, this project enhances our understanding of composite connections. It enables improved construction practices. To ensure model’s accuracy, we compared the results with the experimental data, for steel concrete bolts. The project specifically helps you to simulate the bahavior of steel concrete composite beams in the following paper. “A study on structural performance of deconstructable bolted shear connectors in composite beams” Note: The Abaqus file will be delivered upon purchase, and the PDF will become available one week after payment.
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Abaqus shaft slip ring simulation | Using Python scripts for parametric analysis

€ 270.0
The shaft slip ring is a crucial component enabling the transfer of power and signals in rotating systems. So, this tutorial delves into the intricate Abaqus shaft slip ring analysis. It focuses primarily on the mechanical aspects, offering insights into displacement, stress fields, and strains through the shaft analysis Abaqus model. The tutorial utilizes parametric modeling and Python scripting for the Abaqus shaft slip ring simulation. So, it enables you to optimize geometric parameters, material properties, and loading conditions, enhancing efficiency in modeling processes. It addresses complexities such as creep behavior and material interactions, providing a comprehensive approach tailored for realistic simulations. The tutorial meets various project requirements, supporting them with practical examples and adaptable simulation files. Note: The Abaqus file will be delivered upon purchase, and the video will become available one week after payment.
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Gurson-Tvergaard-Needleman

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.
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Abaqus user element tutorial

Abaqus User element tutorial | UEL advanced level

€ 270.0
(10)
User element (UEL) subroutine (user-defined element) is the highest level of a subroutine that Abaqus offers to its users. This subroutine allows the user to program the basic building block of a finite element simulation. This subroutine becomes very powerful when the user wants to implement a type of element that is not available in Abaqus. Using this subroutine, user can define different types of shape functions, introduce element technology that is not available in Abaqus, or simulate multiphysical behavior that is not possible otherwise. This Abaqus user element tutorial package will give a brief introduction to the user element subroutine followed by theory and algorithm to write subroutine small strain mechanical analysis. First, we will highlight the UEL element stiffness matrix and element residual vector which are to be programmed in the first example. We will also cover shape functions and numerical integration. Next, we’ll talk about UEL inputs and outputs. The first example contains the detailed development procedure of a general-purpose subroutine for 2D plane-strain and 3D simulations using triangular, quadrilateral, tetrahedral, and hexahedral type of elements with reduced and full integration scheme. The second example demonstrates the procedure to build UEL-compatible model in Abaqus/CAE. It also demonstrates how to apply complicated boundary conditions with UEL as well as perform Abaqus analysis on structures which has standard and user elements. As an outcome, user can write their own UEL subroutine afterwards using this program as template.
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Turbine Blade Creep

Theta Protection Creep Model | Turbine Blade Creep Life Accurate Prediction | Creep Failure in Turbine Blades

€ 250.0
(10)

Creep is one of the most significant failure modes in many components where the working temperature and stresses are high for a prolonged period of time. Existing creep models in commercial analysis software like Abaqus are not adequate to model all stages of creep namely – primary, secondary, and tertiary stages. Theta projection method is a convenient method proven to predict all stages of creep, especially the tertiary stage where strain rates are high leading to internal damage and fracture. The aim of the project is to develop a user subroutine for Abaqus to model creep in components using the Theta projection method. The constitutive model for the Theta projection method based on the accumulation of internal state variables such as hardening, recovery, and damage developed by (R.W.Evans, 1984) is adopted to compile a Fortran code for the user subroutine. The user subroutine is validated through test cases and comparing the results with experimental creep data. Creep analysis of a sample gas turbine blade (Turbine Blade Creep) is then performed in Abaqus through the user subroutine and the results are interpreted.

Results of test cases validate the accuracy of the Theta Projection Method in predicting all primary, secondary, and tertiary stages of creep than existing creep models in Abaqus (Creep Failure in Turbine Blades). Results at interpolated & extrapolated stress & temperature conditions with robust weighted least square regression material constants show the convenience in creep modeling with less input data than existing models. The results of creep analysis not only predicted the creep life but also indicated the internal damage accumulation. Thus, creep modeling of components through the user subroutine at different load conditions could lead us to more reliable creep life predictions and also indicate the regions of high creep strain for improvements in the early stages of design.

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