ABAQUS learning: Fracture & Fatigue theory & implementation.

Fatigue represents the most common cause of mechanical structure failures. To investigate this phenomenon, studies have conducted experiments, conducting actual fatigue experiments demands extensive time, substantial financial resources, and is constrained by size limitations. The solution lies in the development and validation of precise numerical models. This is the primary driver behind our course, as it enables accurate and reliable predictions of crack growth. This course delves into the advanced simulation of fatigue crack growth using the eXtended Finite Element Method (XFEM) combined with the Paris Law formulation, fully implemented in ABAQUS software. The course emphasizes the direct cyclic and low cycle fatigue approaches, providing a comprehensive framework for analyzing the degradation of materials under cyclic loading.

You Will Learn:

1. Fundamentals of fracture mechanics and Fatigue Crack Growth:

2. Finite Element Method (FEM) and eXtended Finite Element Method (XFEM)

    – Core principles of FEM and how they apply to crack propagation simulations.

    – Coverage of XFEM, including enrichment functions, and  level-set methods.

    – How to model cracks without remeshing the mesh during propagation and how XFEM handles discontinuities.

3. Fatigue Crack Propagation Regimes:

    – Understanding the relationship between crack size and cycles, including factors like stress ratio effects.

    – Detailed exploration of crack growth laws, including Paris Law, Walker Law, and NASGRO formulations.

    – Methods for life prediction, failure criteria, and assessing the factor of safety in fatigue analysis.

4. Model Creation in ABAQUS:

    – Step-by-step guidance on part creation and material definition, including damage models for traction separation.

    – Implementation of direct cyclic and low cycle fatigue steps, focusing on Fourier representations, and convergence criteria.

    – Special interaction properties like pre-crack definitions and Paris Law implementation for fatigue analysis.

5. Results Interpretation and Post-Processing:

    – Visualizing crack propagation patterns across different cycles.

    – Generating and analyzing key outputs such as crack length vs. cycle graphs and fatigue crack growth rates (da/dN vs. ΔK).

6. Three different case studies.

Course Features:

– Detailed theoretical background paired with practical modeling exercises in ABAQUS.

– Real-world case studies and examples, including complex geometries.

– Guidance on setting up simulations for brittle materials using LEFM principles.

Who Should Enroll:

This course is designed for engineers, researchers, and under graduate or graduate students who wanted to get a very good  understanding of finite element analysis and wish to expand their knowledge in the field of fracture and fatigue analysis using ABAQUS. It is particularly beneficial for those interested in crack growth modeling and the application of advanced methods like XFEM and direct cyclic analysis in practical engineering scenarios.

By the end of the course, participants will be able to simulate, analyze, and interpret fatigue crack growth in various materials and loading conditions, providing them with a competitive edge in the field of structural analysis and design.

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Frequently Asked Questions

How long do I have access to the course materials?

You can view and review the lecture materials indefinitely, like an on-demand channel.

Can I take my courses with me wherever I go?

Definitely! If you have an internet connection, courses on Udemy are available on any device at any time. If you don’t have an internet connection, some instructors also let their students download course lectures. That’s up to the instructor though, so make sure you get on their good side!