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Abaqus Simulation of Cracking in Large-Size Profiles During Pultrusion


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, material property changes, and optimization strategies for enhancing manufacturing efficiency and product quality. This research provides practical knowledge for implementing findings in real-world applications, advancing composite material production.

Hyperelastic modeling of elastomeric foams| Using Abaqus subroutines

This study focuses on modeling the mechanical behavior of open-cell, isotropic elastomeric foams. It is essential for applications in materials science and engineering. The project offers insights into designing customized elastomeric foam materials tailored for impact protection in automotive, sports equipment, and aerospace industries. Numerical simulations, using software like Abaqus, enable the prediction of complex behaviors such as hyperelasticity and viscoelasticity under various loading conditions. The study includes theoretical formulations for hyperelastic constitutive models based on logarithmic strain invariants, crucial for accurately describing large deformations. Practical benefits include the implementation of user-material subroutines in Abaqus, facilitating future extensions to incorporate strain-rate sensitivity, and microstructural defects analysis. This comprehensive approach equips learners with theoretical knowledge and practical tools to advance elastomeric foam modeling. Moreover, it enhances their capability to innovate and optimize materials for diverse applications.

Theta Projection Creep Life Model| Using Abaqus User-Subroutines for Creep Modelling of Gas Turbine Blades

Creep is one of the most significant failure modes in gas turbine 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 gas turbine 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 several test cases and comparing the results with experimental creep data. Creep analysis of a sample gas turbine blade 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. 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. Results of creep analysis in a sample gas turbine blade not only predicted the creep life but also indicated the internal damage accumulation. Thus, creep modeling of gas turbine 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.

Dynamic Analysis Bundle.

 0.0 419.2
Conquer Dynamic Events with the Dynamic Analysis Bundle The Dynamic Analysis Bundle equips you with the knowledge and skills to

piezoelectric Bundle

Master Piezoelectric Material Behavior: The Piezoelectric Bundle The Piezoelectric Bundle equips you with the knowledge and tools to effectively simulate

Full Composite Material Bundle

 0.0 3923.0
Unleash the Potential of Composites: The Full Composite Material Bundle The Full Composite Material Bundle equips you with the knowledge

Python Scripting Bundle

 0.0 1156.0
Automate and Enhance Your Abaqus Workflows: The Python Scripting Bundle The Python Scripting Bundle empowers you to unlock the power

Welding Bundle

 0.0 303.0
Master the Art of Welding Simulation: The Welding Bundle The Welding Bundle equips you with the knowledge and tools to

Wood Damage and Fatigue

Master Wood Behavior: Damage and Fatigue Analysis Bundle This comprehensive Damage and Fatigue Analysis Bundle equips you with the expertise

UMat/VUMat Subroutines Bundle

Master Material Modeling with the UMat/VUMat Subroutines Bundle This comprehensive UMat/VUMat Subroutines Bundle equips you with the knowledge and skills

Unidirectional Composite Bundle

 0.0 1328.0
Comprehensive Unidirectional Composite Analysis Bundle This comprehensive Unidirectional Composite Analysis Bundle equips you with the knowledge and skills to tackle

Composite Damage Models Bundle

 0.0 1023.0
Master the Art of Composite Damage Analysis: Composite Damage Models Bundle The Composite Damage Models Bundle equips you with the

Steel Bundle

 0.0 960.2
Conquer Advanced Steel Behavior: The Advanced Steel Bundle The Advanced Steel Bundle equips you with the knowledge and tools to

Cohesive Bundle

Master Cohesive Zone Modeling: The Cohesive Bundle The Cohesive Bundle equips you with the knowledge and tools to effectively model

Fatigue Bundle

 0.0 600.2
Master Fatigue Analysis: The Fatigue Bundle The Fatigue Bundle equips you with the knowledge and tools to tackle fatigue analysis

Meshing Bundle

Master the Art of Meshing with the Meshing Bundle This comprehensive Meshing Bundle empowers you to tackle the critical first

Simulation of an Ultrasonic Transducer (3D Ultrasonic Vibration Assisted Turning Tool)


Since the invention of ultrasonic vibration assisted turning, this process has been widely considered and investigated. The reason for this consideration is the unique features of this process which include reducing machining forces, reducing wear and friction, increasing the tool life, creating periodic cutting conditions, increasing the machinability of difficult-to-cut material, increasing the surface quality, creating a hierarchical structure (micro-nano textures) on the surface and so on. Different methods have hitherto been used to apply ultrasonic vibration to the tip of the tool during the turning process. In this research, a unique horn has been designed and constructed to convert linear vibrations of piezoelectrics to three-dimensional vibrations (longitudinal vibrations along the z-axis, bending vibrations around the x-axis, and bending vibrations around the y-axis). The advantage of this ultrasonic machining tool compared with other similar tools is that in most other tools it is only possible to apply one-dimensional (linear) and two-dimensional (elliptical) vibrations, while this tool can create three-dimensional vibrations. Additionally, since the nature of the designed horn can lead to the creation of three-dimensional vibrations, there is no need for piezoelectric half-rings (which are stimulated by a 180-phase difference) to create bending vibrations around the x and y axes. Reduction of costs as well as the simplicity of applying three-dimensional vibrations in this new method can play an important role in industrializing the process of three-dimensional ultrasonic vibration assisted turning.

In this example, how to model all the components of an ultrasonic transducer and its modal and harmonic analysis are taught in full detail.