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Overview of pressure vessel failure modes
Fatigue cracking vs plastic collapse vs buckling
Cyclic loading sources in pressure vessels
Fatigue damage accumulation concepts
Difference between strength-based design (Part 4) and fatigue-based design (Part 5)
Types of stresses relevant to fatigue (primary, secondary, peak)
Stress categorization for fatigue assessment
Linear elastic FEA assumptions and limitations
Mesh requirements and convergence for fatigue analysis
Stress linearization through thickness
Identification of fatigue hot spots
Purpose and philosophy of fatigue screening
Applicability limits and conservative assumptions
Screening Method A – Material and load-cycle based screening
Screening Method B – Elastic stress range screening
Screening Method C – Welded joint screening
Decision flow for detailed fatigue analysis
Stress-life fatigue theory fundamentals
High-cycle vs low-cycle fatigue behavior
ASME fatigue design curves
Mean stress effects and correction models
Goodman method
Gerber method
Rainflow cycle counting technique
Constant amplitude fatigue damage calculation
Variable amplitude fatigue damage using Miner’s Rule
Onset of plasticity and local strain concentration
Limitations of purely elastic fatigue analysis
Strain-life (ε–N) approach fundamentals
Coffin–Manson and Basquin relationships
Mean stress effects in strain-life fatigue
Morrow model
Smith–Watson–Topper (SWT) parameter
Local strain estimation using Neuber’s Rule
Ratcheting behavior under cyclic pressure and thermal loads
ASME ratcheting acceptance criteria
Elastic and elastic-plastic ratcheting assessments
Shakedown concepts and cyclic stabilization
Relationship between ratcheting, shakedown, and fatigue life
Fatigue behavior of welded joints
Stress concentration and crack initiation at weld toes
ASME weld fatigue evaluation approaches
Equivalent Structural Stress Method (ASME Method C)
Fatigue acceptance criteria for welded joints
Role of inspection, pressure testing, and life management
End-to-end fatigue assessment workflow
Load definition → FEA → stress extraction → fatigue evaluation
Typical mistakes and best practices
Case studies on pressure vessels and nozzles
Documentation and reporting as per ASME requirements
Fatigue Analysis for Pressure Vessels ASME Section VIII Division 2 – Part 5 24 Sessions | 45 Minutes Each | Practical + Code-Oriented
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