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Design by Analysis Requirements in ASME BPV Code, Section VIII, Division 2: Alternative Rules

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Monday,20 April 2020

  • Day One

    Background and Development of Section VIII Division 2

    • Organization of VIII-2
    • Overview Of VIII-2, Parts 1 through 9

    Comparison: VIII-1 vs VIII-2 with a Focus on Cost

    • ASME VIII-1 PLUS Construction, (It's what most refinery & petrochemical companies do!)
    • Comparison - ASME VIII-1 vs ASME VIII-2
    • Comparison - tmin & The VIII-2 Class 2 Allowable Stress Bases
    • Comparison - ASME VIII-1 vs ASME VIII-2 - Summary

    References - ASME PTB-1 & PTB-2

    Basic Concepts in Section VIII, Division 2, Part 5 - Design by Analysis

    • Design-By-Analysis (DBA)
    • The Force Method
    • Stress Definitions
    • Primary Stress & Limits
    • VIII-2 Allowable Stress Basis
    • Secondary Stress & Limits
    • Peak Stress & Limits
    • Stress Classification - The Hopper Diagram
    • Stress Classification - Nozzles
    • Stress Calculations for Code Compliance

    Supplemental Information for VIII-2, Part 5 Design-By-Analysis Applicability

    • Applicability
    • Numerical Analysis
    • Numerical Analysis & Material properties
    • Material Properties

    Protection Against Plastic Collapse

    • Overview
    • Elastic Stress Analysis Method
    • Limit Load Analysis Method
    • Elastic-Plastic (EP) Analysis Method
    • Stress Measure for Multiaxial Stress States
    • Elastic Stress Analysis Method - Example 1
    • Limit Load Analysis Method - Example 1
    • Elastic-Plastic (EP) Analysis Method - Example 1
    • Comparison of Methods - Example 1
    • Example 2

    Protection Against Local Strain

    • Overview
    • Elastic Stress Analysis Method
    • Elastic-Plastic (EP) Analysis Method

Tuesday,21 April 2020

  • Day Two

    Design for the Protection of Buckling

    • The Lecture Covers
    • What is Buckling?
    • Bifurcation or Eigenvalue Analysis
    • Buckling Analysis Options
    • Type 1 Buckling Analysis
    • Design Margin
    • Effects of Imperfections On Buckling Loads
    • Type 2 Buckling Analysis
    • Type 3 Buckling Analysis
    • Load Cases in Buckling Analysis
    • Example
    • References

    Design for the Protection of Fatigue

    • Definition
    • Fatigue Basics
    • VIII-2 Fatigue Analysis - Overview
    • Fatigue Screening
    • Fatigue Assessment Methods
    • Fatigue Assessment Methods - Comparison
    • Fatigue Assessment Methods - Examples
    • Fatigue Assessment Methods - References

    Development Of The ASME Smooth Bar Fatigue Curves

    The Infamous Ke and Kv Factors

Wednesday,22 April 2020

  • Day Three

    Fundamentals of Ratcheting for Design by Analysis

    • Ratcheting Definition
    • Ratcheting Overview
    • Ratcheting Assessment - Elastic Stress Analysis
    • Ratcheting Assessment - Bree Diagram
    • Ratcheting Assessment - Bree Diagram - Loading Conditions
    • Ratcheting Assessment - Bree Diagram - Effect of Yield Stress
    • Ratcheting Overview - Elastic-Plastic Stress Analysis
    • Elastic-Plastic Modeling of Ratcheting Using FEA
    • Cyclic Plasticity
    • Ratcheting Summary
    • References - Ratcheting

    Summary of Section VIII Division 2 Code Case 2605

    • Background of ASME VIII-2 Code Case 2605 (CC2605)
    • Technical Background of CC2605
    • Highlights of CC2605
    • Modifications to CC2605
    • Example Problem

    What's New in Fatigue - see API 579-1/ASME FFS-1, Part 14

    Fatigue Analysis Using A Fracture Mechanics Approach

    Material Toughness Requirements Using A Fracture Mechanics Approach

    • Brittle Fracture Overview
    • VIII-2 Toughness Rules
    • Using Fracture Mechanics To Determine the MDMT
    • Technical Basis Of VIII-2 Toughness Rules
    • Summary
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