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Basic FEA ahead of Pressure vessel, Centrifugal pumps and compressors, wind structures

Dr.Joel Daniel

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₹0

Last updated Mon, 22-Apr-2024
29 Lessons 00:00:00 Hours English
This course is essential to start any further FEA course including pressure vessel design, pumps, compressors, wind structures, gas turbines, and aerostructures. This is a free course for the people who are going to take any advanced course.
  • Fundamentals of FEA
  • Meshing Techniques: Hexa and Tet
  • Link Elements applications
  • Beam Elements applications.
  • Shell element applications
  • Solid Element applications
  • Best Practices of applying boundary conditions
  • Best Practices of applying loading conditions
  • Results Interpretation
  • Symmetry applications: Cyclic, axisymmetric
  • Examples: Centrifugal Pump Casings
  • Examples: Propeller shaft
  • Examples: Test Rig
  • Examples: multistage centrifugal pumps
  • Examples: Gear box
  • Examples: Spur gears
ANSYS Training: Mechanical Vibrations

Dr.Joel Daniel

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₹30000

Last updated Sat, 27-Jan-2024
33 Lessons 00:00:00 Hours English
FEA is a valuable tool in the analysis and design of mechanical systems to ensure that vibrations are well-understood and controlled, leading to the development of reliable and efficient structures and machinery. It allows engineers to assess the dynamic behavior of structures under various conditions and make informed design decisions to prevent potential issues related to mechanical vibrations.
  • Understanding of FEA Basics: ANSYS training in mechanical vibrations typically covers fundamental concepts of FEA, ensuring participants have a solid understanding of how the software works, including meshing, material properties, boundary conditions, and solving techniques
  • Modelling Complex Structures: Participants learn how to create accurate 3D models of complex structures and mechanical components relevant to mechanical vibrations analysis using ANSYS
  • Meshing Techniques: The training includes meshing strategies and techniques for generating high-quality meshes that capture the geometry and structural features effectively, especially in areas prone to stress concentrations
  • Material Modeling: Engineers gain expertise in assigning appropriate material properties and models within ANSYS, considering isotropic or anisotropic behavior, and accounting for damping characteristics relevant to mechanical vibrations
  • Boundary Conditions and Loading: Training covers the proper application of boundary conditions and loading scenarios to simulate real-world conditions, ensuring the accuracy of the simulation results
  • Modal Analysis: Participants learn how to perform modal analysis using ANSYS, allowing them to extract natural frequencies, mode shapes, and participation factors critical for understanding the vibrational behaviour of structures.
  • Harmonic Analysis: Training includes techniques for performing harmonic analysis in ANSYS, enabling engineers to study the response of structures to periodic excitations and identify potential resonance issues
  • Transient Analysis: Engineers gain the ability to simulate transient dynamic events, such as start-up, shutdown, or impact loading, to understand the time-dependent response of structures to dynamic forces
  • Post-Processing and Result Interpretation: Training covers post-processing tools in ANSYS for interpreting results, visualizing mode shapes, stress distributions, and displacement patterns critical for assessing the vibrational characteristics of structures
  • Fatigue Analysis: Participants learn how to perform fatigue analysis within ANSYS, helping them assess the durability and fatigue life of components subjected to cyclic loading
  • Optimization Strategies: Training may cover optimization techniques within ANSYS, allowing engineers to iteratively optimize designs to reduce vibrations, improve performance, and meet design criteria
Basic FEA Training for Beginners

Dr.Joel Daniel

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₹20000

Last updated Tue, 02-Jan-2024
16 Lessons 00:00:00 Hours English
Online Training/Classroom For Basic FEA Course using ANSYS By Dr. Joel Daniel M.Tech., Ph.D., MISTE, MIE, MIPE
  • Step 1: Theoretical approach: Students will use theoretical concepts to solve problems. Every one of these classes aids pupils in reviewing the fundamentals and comprehending the issue in depth.
  • Step 2:FEA Approach: Students will use FEA to solve the same issue. This part assists students in validating FEA results using manual calculations.
  • Step 3: Industrial applications: Industrial applications on similar concepts will be explained in detail. In the third step,
  • In the third step, students will be familiar with FEA and the theoretical approach. He will be in a position of handling practical engineering problems
ANSYS Training: Centrifugal pump and Compressor Design and Analysis as per API, Non-API, Euro Code, ASME codes.

Dr.Joel Daniel

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₹20000

Last updated Sun, 14-Apr-2024
18 Lessons 00:00:00 Hours English
  • Torsional stiffness for base skid as per HIS standards
  • Stress calculations for the base plate under lifting conditions, transportation conditions, wind and seismic load conditions
  • Modal analysis assessment of base skid
  • Harmonic analysis of the base skid
  • Random analysis of the base skid
  • Stiffness test acceptance criteria for base skid as per API 610, clause 6.3.7
  • Structural assessment of centrifugal pump casing under MAWP and nozzle loads as per API 610 clause 5.3.4
  • Leakage assessment of the casings as per API 610 clause 5.3.3
  • Calculations of stiffness and damping values for short and long bearings (wear rings, sleeves, and hydraulic bearings)
  • Rotor dynamics: Lateral critical speed analysis as per API 610, Annex I.
  • Torsional critical speed analysis as per API 610 clause 5.9.2
  • Bolt assessment
  • Weld assessment as per DNV codes
  • Stress analysis for casings and impellers under variable pressure load conditions
  • Ultimate Limit State (ULS) for the compressor skid
  • Serviceability Limit States (SLS) for the compressor skid
  • Accidental Limit States (ALS) for the compressor skid
  • Blast Load analysis for the compressor skid.
Offshore wind turbine structures

Dr.Joel Daniel

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₹20000

Last updated Sat, 28-Oct-2023
32 Lessons 00:00:00 Hours English
This training includes FEA modelling of the weld structures of the wind structures as per DNV guidelines, SCF, Ultimate Limit States (ULS) and Serviceability Limit States (SLS), Accidental limit states, fatigue damage calculations of the K-joint, X-joint, J-joint of the wind foundation structures.
  • Participants will have developed a thorough grasp of structural design using FEA, including the use of advanced nonlinear simulations, by the conclusion of this course. They will be prepared to confidently design and assess wind structures, guaranteeing their safety and optimum performance.
  • Introduction to Wind Turbine Foundation Structures and DNV Codes
  • Introduction to Finite Element Analysis
  • Modeling Wind Turbine Foundations for FEA
  • Load and Boundary Conditions
  • Ultimate Limit State (ULS) Analysis
  • Fatigue Limit State (FLS) Analysis
  • Serviceability Limit State (SLS) Analysis
  • Weld strength Calculations as per DNV codes
  • Optimization and Design Review
  • Case Studies and Practical Applications
  • Real-world case studies of wind turbine foundation projects
  • Hands-on exercises in FEA software for ULS, FLS, and SLS analysis
  • Practical examples of weld calculations and hotspot analysis
Pressure vessel design using ANSYS software as per ASME

Dr.Joel Daniel

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₹50000

Last updated Sun, 10-Dec-2023
129 Lessons 00:00:00 Hours English
The design and verification of pressure vessels are regulated by the design requirements outlined in the ASME Boiler and Pressure Vessel Code (BPVC). Designing a convention that meets the standards of the ASME BPVC code would result in a design that is characterized by a cautious approach. The present scenario may be effectively addressed via the use of contemporary finite element analysis (FEA) commercial software packages such as ANSYS. This training session will focus on the discussion of size optimization for pressure vessels that adhere to the design-by-analysis standards outlined in the ASME Sec. VIII Division 2 specification. The integration of ANSYS is used to do stress analysis, hence achieving the desired outcome.
  • 1. This course aims to provide a comprehensive understanding of the fundamental concepts and advanced methods involved in the design of pressure vessel structures using Finite Element Analysis (FEA).
  • 2. Acquire a comprehensive understanding of solid-shell components in order to effectively develop a finite element analysis (FEA) model for the pressure vessel.
  • 3. Acquire the necessary skills to effectively implement the American Society of Mechanical Engineers (ASME) norms and standards in the realm of pressure vessel design.
  • 4. To enhance proficiency in doing experiments involving nonlinear materials, contact mechanics, and large deformations, as well as to improve the ability to analyze and comprehend stress-strain relationships.
  • 5. This program aims to cultivate and strengthen individuals' critical thinking and problem-solving skills specifically in the context of difficult design issues pertaining to pressure vessel constructions.
Rotordynamics Analysis

Dr.Joel Daniel

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₹40000

Last updated Thu, 08-Feb-2024
65 Lessons 00:00:00 Hours English
1. Analyzing and predicting vibration behavior of structures is important in the design and development of mechanical systems. 2. A rotor refers to a mechanical system in which at least one part rotates with a very high angular momentum. Vibration analysis of rotor systems requires special knowledge because of several unique behaviors of the structure stemming from rotation effect, which is not observed in non-rotating structures. 3. These concepts specific to rotors are the gyroscopic effect, Coriolis effect, spin softening, rotating damping, and mode directivity. The concepts of the gyroscopic effect, Coriolis effect, and spin softening are critical in the rotor dynamics field. 4. The application of finite element analysis (FEA) to rotordynamics allows for modeling rotors that have complex geometry, which however requires sound understanding of basic concept and theory of rotordynamics and the constraints of existing FEA software.
  • Carry out the basic end-to-end rotordynamics analysis process in Ansys Mechanical.
  • Understand the underlying technical and analysis features that are unique to rotordynamics.
  • Describe and apply the essential rotordynamics analysis capabilities: computation of critical speeds, prediction of rotor whirl and system stability, computation of unbalance response, and consideration of start up and shut-down transient responses.
  • Results Validation
  • Training on Rotor Dynamics tool, ROSS {Open Forum)
  • Exercise 1: Lateral critical speed analysis of multi sage centrifugal pump casings
  • Exercise 2: Forced response analysis of multi sage centrifugal pump casings
  • Exercise 3: Torsional critical speed analysis of multi sage centrifugal pump casings
  • Exercise 4: Torsional critical speed analysis of multi sage centrifugal pump casings (VFD)
  • Exercise 5: Steady state responce analysis of multi sage centrifugal pump casings (VFD)
  • Hydrodynamic Bearing Calculations
  • Short bearings (Wear rings, seals, sleeves) calculations
  • Gyroscopic Effects
  • Rotor Mounted on Bearings
  • Design Optimization using DesignXplorer
Advanced Finite Element Analysis using ANSYS Workbench and APDL

Dr.Joel Daniel

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₹100000

Last updated Tue, 23-Apr-2024
0 Lessons 00:00:00 Hours English
The Finite Element Analysis (FEA) is the simulation of any given design concept using the numerical technique called Finite Element Method (FEM). Engineers/Product Companies use FEA to reduce the number of physical prototypes and experiments and optimize components in their design phase to develop better products, faster while saving on expenses. ANSYS is a leading FEA software used in wire range of industries Ansys structural analysis software enables engineers to solve complex structural engineering problems and make better, faster design decisions. With the finite element analysis (FEA) solvers available in the suite, you can customize and automate solutions for your structural mechanics problems and parameterize them to analyze multiple design scenarios. You can also connect easily to other physics analysis tools for even greater fidelity. Ansys structural analysis software is used across industries to help engineers optimize their product designs and reduce the costs of physical testing This course is all about solving industrial design problems using ANSYS Workbench & APDL by learning and completing the series of training and workshops. By the end of the course you will be able to uses ANSYS toot effectively for static and dynamic engineering problems with thermal coupling.
  • Upon completion of the course, participants will acquire the necessary skills to proficiently use the ANSYS software in addressing both static and dynamic engineering issues, particularly those including thermal coupling.
  • Understanding of FEA Basics: ANSYS training in mechanical vibrations typically covers fundamental concepts of FEA, ensuring participants have a solid understanding of how the software works, including meshing, material properties, boundary conditions, and solving techniques
  • Modelling Complex Structures: Participants learn how to create accurate 3D models of complex structures and mechanical components relevant to mechanical vibrations analysis using ANSYS
  • Meshing Techniques: The training includes meshing strategies and techniques for generating high-quality meshes that capture the geometry and structural features effectively, especially in areas prone to stress concentrations
  • Material Modeling: Engineers gain expertise in assigning appropriate material properties and models within ANSYS, considering isotropic or anisotropic behaviour, and accounting for damping characteristics relevant to mechanical vibrations
  • Boundary Conditions and Loading: Training covers the proper application of boundary conditions and loading scenarios to simulate real-world conditions, ensuring the accuracy of the simulation results
  • Basic FEA: Introduction of FEA,Thermal-structural Analysis,Symmetry Applications FEA Guidelines,3D Solid Element,Plane stress/plane strain elements, Plate element /Membrane element and shell elements,3D Beam elements 3D Link/Spar Elements, Vibration Analysis
  • Non-Linear Analysis: Overview of Non-linear analysis, Non-Linear Analysis Procedure in ANSYS, Factors influencing the problem's convergence: Contact Settings, Guidelines for obtaining contact convergence, Case Studies to demonstrate convergence issue and resolve it, exercises on Material Nonlinear Analysis, exercises on Material and Contact Nonlinear Analysis, exercises on Large Deformation Nonlinear analysis, Workshop on Contact Non-linearity analysis
  • Vibration Analysis: Introduction to Mechanical Vibrations, Free Vibrations. Single-Degree-of-Freedom (SDOF) and Multi-Degree-of-Freedom (MDOF) Systems , Numerical approach and ANSYS approach to solve the problems, HARMONICALL Y EXCITED VIBRATION, TRANSIENT VIBRATIONS, Modal Analysis using ANSYS, Prestress Modal analysis, Scaled model analysis, Random Vibrations, Harmonic Analysis Using ANSYS, Impact Analysis or shock load analysis
  • Rotor Dynamics: rotor dynamics overview,gyroscopic effects,rotor mounted on bearings,simple rotor systems,theory of bearing characteristics calculations, fea approach (ansys and ross) to find the bearing characteristics (stiffness and damping),instability in rotor systems,theoretical approach of finding lateral critical speeds,forced response analysis (unbalance response analysis),fea simulation of lateral critical speed analysis using ansys and ross,fea simulation of lateral critical speed analysis uisng ansys and ross,theoretical approach of finding torsional vibrations,fea simulation of torsional critical speed analysis using ansys and ross,fatigue life calculations in ansys,exercise on stiffness and damping values for long bearings and short bearings using ansys and ross,exercise on lateral analysis study of the multistage centrifugal pump using ansys and ross, exercise on torsional analysis of the pump-motor and direct coupling in ansys,exercise on torsional analysis of the pump-motor and flexible coupling-gear box in ansys,exercise on field fix of boiler feed pump -lateral and torsional analysis
  • Offshore wind turbine structures: Introduction to Wind Turbine Foundation Structures and DNV Codes, Foundation Design and Loads, Weld Modeling in FEA, Ultimate Limit State (ULS) Analysis for Welded Joints, Serviceability Limit State (SLS) Analysis for Welded Joints, Accidental Limit States and Load Cases, Fatigue Damage Calculations for Welded Joints, Reporting and Documentation for Weld Analysis, Case Studies and Practical Applications
  • Centrifugal Pump and Compressors: Torsional stiffness for base skid as per HIS standards, Stress calculations for the base plate under lifting conditions-transportation conditions- wind and seismic load conditions,Modal analysis assessment of base skid,Harmonic analysis of the base skid,Random analysis of the base skid,Stiffness test acceptance criteria for base skid as per API 610, clause 6.3.7,Structural assessment of centrifugal pump casing under MAWP and nozzle loads as per API 610 clause 5.3.4,Leakage assessment of the casings as per API 610 clause 5.3.3,Calculations of stiffness and damping values for short and long bearings (wear rings, sleeves, and hydraulic bearings),Rotor dynamics: Lateral critical speed analysis as per API 610- Annex I,Torsional critical speed analysis as per API 610 clause 5.9.2,Bolt assessment,Weld assessment as per DNV codes,Stress analysis for casings and impellers under variable pressure load conditions,Ultimate Limit State (ULS) for the compressor skid,Serviceability Limit States (SLS) for the compressor skid,Accidental Limit States (ALS) for the compressor skid, Blast Load analysis for the compressor skid ,Wind and Seismic Load Analysis,
  • Pressure Vessel Design: Plastic collapse protection using the elastic stress approach, in accordance with the guidelines outlined in ASME VIII Div. 2,Protection against Plastic Collapse-Global Criteria: Limit Load Analysis,Plastic collapse protection using the elastic-plastic approach, in accordance with the guidelines outlined in ASME VIII Div. 2,Protection against Plastic Collapse-Local Criteria: Elastic Analysis-Triaxial stress Limit,Protection against Plastic Collapse-Local Criteria: Elastic Plastic Analysis-Local strain Limit,Protection against collapse from buckling using elastic , elastic-plastic analysis approach (as per ASME VIII Div.2),Fatigue Life Estimation of Pressure Vessel as per ASME Section VIII Div 2, Lifting Lug strength assessment,Weld assessment,Bolt strength assessment, Thermal ratcheting analysis for pressure vessel as per ASME,Creep assessment for pressure vessel for high temperature applications, Practice Exercises, Lifting Lug strength assessment
  • High Cycle Fatigue in FEA Simulation: Introduction to Fatigue, Stress-Life Curves, Mean Stress Effects on S-N Behavior, and Factors affecting S-N Behavior, S-N curve representation and approximations, S-N approach for Notched Members, Example of life estimation using the S-N approach,Workshop1: HCF calculations for Gas turbine components,Workshop2:HCF calculations for automobile components
  • Low cycle Fatigue Simulation in FEA Simulation: Introduction to LCF, Strain-Life Curves, Mean Stress Effects on strain-life Behavior, and Factors affecting strain-life Behavior, Strain-Based approach to life estimation, Strain-life approach for Notched Members, Finding stresses in plastic region using Nuber’s rule, Strain energy density or glinka’s rule, Workshop3: LCF calculations for Gas turbine components
  • Fatigue from Variable Amplitude Loading in FEA Simulation, Spectrum loads and cumulative damage,Damage quantification, damage fraction, and accumulation,Load interaction and sequence effects,Cycle counting methods; rain flow, and other cycle counting methods,Life estimation using the stress-life approach,Life estimation using a strain-life approach,Crack growth and life estimation models, Workshop 4: LCF and HCF calculations for Gas turbine components
  • Fracture Mechanics:Mechanisms of Fatigue and Creep Fatigue,Fundamentals of LEFM and applications to Fatigue Crack Growth Contribution,FRACTURE TOUGHNESS - Kc , KIc,Crack Tip Plastic Zone,Fatigue crack growth,Mean stress effect,Cyclic Plastic Zone Size,Crack Closure,Small Fatigue Cracks and LEFM Assumption,Plastic Extension of LEFM and Elastic Plastic Fracture Mechanics,Applications of Fracture Mechanics to crack growth at notches,SIF for residual stresses,Crack growth and life estimation for variable amplitude loading,Crack growth and life estimation for multiaxial stresses,Fatigue crack growth of weldments ( Constant amplitude Fatigue) Environmental effects: Fatigue crack growth behavior, Corrosion Fatigue, Fretting Fatigue, Low temperature Fatigue, High temperature Fatigue
  • Exercises of Fracture Mechanics: Computation of SIF for solid cylinder block through (Elliptical Crack,Pre meshed crack,Arbitrary crack),Crack Propagation simulation for three-point bend specimen (LEFM),Plasticity accountability through LEFM –Spur gear example through perturbation approach,Crack Propagation due to High cycle Fatigue for turbine blade.
  • Workshops on Fracture Mechanics :3D Fracture Mechanics Simulation Procedure through ANSYS Workbench (Elliptical Crack- pressure vessel with internal pressure,Pre meshed crack – Rail track from publication,Arbitrary crack- Spur gear root fillet ),Crack Propagation simulation in ANSYS Workbench,LEFM (Linear Elastic Fracture Mechanics)- Spur gear tooth ( ASME publication),LEPM (Linear elastic-plastic Fracture Mechanics)- Gas turbine blade,Thermal Mechanical Fatigue (TMF)- Gas turbine blade, Crack Propagation due to High cycle Fatigue - Gas turbine blade.
  • Steady-state thermal-structural analysis of Gas turbine components: Need of steady-state thermal structural analysis, Preparation of FEA model for thermal analysis at steady state point,Preparation structural FEA for stress calculations at steady state point, Results evaluation, Failure criteria as per ASME
  • Transient thermal-structural analysis of Gas turbine components: Need of steady-state thermal structural analysis,Preparation of FEA model for thermal analysis at steady state point,Preparation structural FEA for stress calculations at steady state point, Results evaluation
  • Thermal Mechanical Fatigue Assessment of Gas Turbine Components: Theoretical concept of CREEP, Method of finding CREEP Coefficients through strain hardening approach, Performing transient thermal-structural analysis by considering CREEP, Evaluation of the CREEP rupture and creep strength as per Stress approach,Evaluation of the CREEP rupture and creep strength as per Strain approach
ANSYS Training: Non-Linear Analysis

Dr.Joel Daniel

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₹20000

Last updated Tue, 31-Oct-2023
47 Lessons 00:00:00 Hours English
Design engineers often encounter materials, components, and assemblies that exhibit intrinsic nonlinear behaviour in their daily work. The neglect of these nonlinearities may have a significant impact on the precision of simulations. Many engineers, nonetheless, continue to avoid engaging in nonlinear simulation due to the perception that it is excessively intricate and time-consuming. Several years ago, such was actually the situation. The process of establishing and conducting nonlinear simulations required a greater level of expertise and a longer time commitment. Furthermore, there has been a longstanding apprehension about the intricate numerical techniques used to depict nonlinear reactions. Simulation specialists were often responsible for doing nonlinear analysis if it was conducted at all. The previously held beliefs on the complexity of nonlinear simulation have been rendered obsolete due to advancements in finite element analysis (FEA) software and processing technology. Contemporary structural analysis software integrates automated processes and pre-set parameters, facilitating user-friendly execution of nonlinear simulations. The continuous advancement in processing power, seen in both the engineer's personal computer and the server room, has facilitated the feasibility of conducting nonlinear simulations, even for rapid design iterations. Throughout this series of lectures, participants will engage with the fundamental principles of nonlinearity, explore algorithms designed to address nonlinear problems and examine strategies aimed at resolving convergence challenges. In this course, participants will engage in a series of over six sessions aimed at comprehending the finite element analysis (FEA) technique for problem-solving. These workshops will cover various approaches to addressing convergence concerns, resolving such challenges, and exploring industrial applications where nonlinear analysis is useful. We are excited to announce ANSYS Training for Nonlinear Analysis Initiative. The program involves 20 hours of online interactive training sessions and 20 recorded sessions for practice. It is designed to provide comprehensive instruction on nonlinear analysis using ANSYS software. The program covers a range of topics, such as material nonlinearities, contact, large deformation, and more. The training is suitable for engineers and researchers who want to learn how to use ANSYS software for nonlinear analysis. Upon completion of the training, participants will have the skills and knowledge needed to perform complex nonlinear analyses with ANSYS software. After every online interactive session, a recording of the session will be uploaded into the PE-FEA database. This will benefit users who cannot attend the sessions as they can watch the recorded sessions and practice the exercises at their convenience. The program will be conducted through Zoom. For more information on fees and program structure, please contact info@fea.com and dr.joeldaniel@gmail.com.
  • What is the concept of nonlinearity and where may we see its application in real-time engineering applications
  • The issue of convergence in the non-linear problem
  • What are the different kinds of nonlinearity in finite element analysis
  • Factors Influencing Convergence Difficulties
  • Best Practices for Contact Modelling
  • 10 different case studies to help resolve the convergences
  • 6 Exercises: Applications of nonlinear analysis in the real world, focusing on subsea drilling, Matine structures, automobiles, and gas turbines
ANSYS Training: Fatigue and Fracture Mechanics

Dr.Joel Daniel

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₹20000

Last updated Mon, 22-Apr-2024
0 Lessons 00:00:00 Hours English
SDasd
  • High Cycle Fatigue in FEA Simulation: Introduction to Fatigue,Stress-Life Curves,Mean Stress Effects on S-N Behavior, and Factors effecting S-N Behavior,S-N curve representation and approximations,S-N approach for Notched Members,Example of life estimation using the S-N approach,Workshop1: HCF calculations for Gas turbine components,Workshop2:HCF calculations for automobile components
  • Low cycle Fatigue Simulation in FEA Simulation: Introduction to LCF,Strain-Life Curves,Mean Stress Effects on strain-life Behavior, and Factors effecting strain-life Behavior,Strain-Based approach to life estimation,Strain-life approach for Notched Members,Finding stresses in plastic region using Nuber’s rule , Strain energy density or glinka’s rule ,Workshop3: LCF calculations for Gas turbine components
  • Fatigue from Variable Amplitude Loading in FEA Simulation,Spectrum loads and cumulative damage,Damage quantification, damage fraction, and accumulation,Load interaction and sequence effects,Cycle counting methods; rain flow, and other cycle counting methods,Life estimation using the stress-life approach,Life estimation using a strain-life approach,Crack growth and life estimation models, Workshop 4: LCF and HCF calculations for Gas turbine components
  • Fracture Mechanics:Mechanisms of Fatigue and Creep Fatigue,Fundamentals of LEFM and applications to Fatigue Crack Growth Contribution,FRACTURE TOUGHNESS - Kc , KIc,Crack Tip Plastic Zone,Fatigue crack growth,Mean stress effect,Cyclic Plastic Zone Size,Crack Closure,Small Fatigue Cracks and LEFM Assumption,Plastic Extension of LEFM and Elastic Plastic Fracture Mechanics,Applications of Fracture Mechanics to crack growth at notches,SIF for residual stresses,Crack growth and life estimation for variable amplitude loading,Crack growth and life estimation for multiaxial stresses,Fatigue crack growth of weldments ( Constant amplitude Fatigue)
  • Environmental effects: Fatigue crack growth behavior,Corrosion Fatigue,Fretting Fatigue,Low temperature Fatigue,High temperature Fatigue
  • Exercises of Fracture Mechanics: Computation of SIF for solid cylinder block through (Elliptical Crack,Pre meshed crack,Arbitrary crack),Crack Propagation simulation for three-point bend specimen (LEFM),Plasticity accountability through LEFM –Spur gear example through perturbation approach,Crack Propagation due to High cycle Fatigue for turbine blade.
  • Workshops on Fracture Mechanics :3D Fracture Mechanics Simulation Procedure through ANSYS Workbench (Elliptical Crack- pressure vessel with internal pressure,Pre meshed crack – Rail track from publication,Arbitrary crack- Spur gear root fillet ),Crack Propagation simulation in ANSYS Workbench,LEFM (Linear Elastic Fracture Mechanics)- Spur gear tooth ( ASME publication),LEPM (Linear elastic-plastic Fracture Mechanics)- Gas turbine blade,Thermal Mechanical Fatigue (TMF)- Gas turbine blade,Crack Propagation due to High cycle Fatigue - Gas turbine blade.
Course Image

Protection against Plastic Collapse-Global Criteria: Elastic Stress Analysis Method.

The design approach is followed as per ASME BPVC.VIII.2-2019, Part 5, Subpart 5.2.2. This class focuses on the ANSYS submodeling process.

What is Submodeling:

Submodeling is a technique used in finite element analysis to obtain more detailed results in a specific region of interest within a larger model. This can be useful when you want to focus on a smaller area of your structure where high stresses or complex behaviour is expected. The submodeling approach involves creating a smaller, more refined model of the region of interest within the larger model.

The initial model is run with a coarse mesh and identifies peak stress location. To extract accurate results at the critical region, a submodeling approach is used. The membrane and membrane + bending stress are calculated using the stress linearization technique.

Steps followed for the sub-modeling process in ANSYS:

<!--[if !supportLists]-->1.     <!--[endif]-->Create the Initial Model

Start using a coarse mesh for the analysis. Ensure that your global mesh has a more sensible size. It must pass the aspect ratio test at the element quality level. Tet mesh analysis might be used to begin.The pressure vessel model has been built using tet mesh. The loads and boundary conditions are implemented in accordance with ASME BPVC.VIII.2-2019, Part 5, Subpart 5.2.2.

2. Identify the Region of Interest

Determine the specific region within the global model where you need more detailed results. Define a new model that represents the smaller region of interest. This model typically has a finer mesh and more accurate boundary conditions. Generate a mesh for the submodel, ensuring that it captures the details of the structure in the region of interest.

3. Apply Boundary Conditions

Transfer the boundary conditions from the global model to the submodel to ensure consistency.

4. Results

The vonMises stress plot for the submodel is shown in Fig. Nice stress distribution at the area of interest can be seen in Fig.

 

5. Stress Linearization Results

The Stress Classification Line (SCL) is considered at the region of maximum stress through the wall thickness. ASME rules are used to compute the allowable limits for the membrane and membrane plus bending. The membrane stress and membrane plus bending stresses from the stress linearization are compared to the permitted limits. The FEA findings are within the permitted limitations.

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On Going Training: Pressure Vessel Design As per ASME Sec-VIII Div 2. Please contact at info@pe-fea.com for the training details.

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