Fitness-for-Service Fracture Assessment of Structures Containing Cracks

Fitness-for-Service Fracture Assessment of Structures Containing Cracks

A Workbook based on the European SINTAP/FITNET procedure

1st Edition - September 12, 2007

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  • Authors: Uwe Zerbst, Manfred Schödel, Stephen Webster, Robert Ainsworth
  • eBook ISBN: 9780080552835

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Description

The purpose of Fitness-for-Service Fracture Assessment of Structures Containing Cracks is to facilitate the use of fracture mechanics based failure assessment procedures for the evaluation and design of structures and components. All practical structures contain flaws and the optimum combination of cost efficiency and safety whilst achieving the required capability, can only be realised by using state of the art methods such as that represented by the European flaw assessment method SINTAP/FITNET to analyse the safety risk. This book is written by practitioners with extensive experience in both the development and use of integrity assessment methods and provides comprehensive information on the basic principles and use of analytical flaw assessment. It provides an introduction to the method, its background, how it can be applied, its potential and, importantly, its limitations. The explanations are complimented by using a large number of worked examples and validation exercises which illustrate all aspects of the procedure. In addition, for students and engineers who are new to the subject, a comprehensive glossary of basic terms used in fracture mechanics based integrity evaluations is included. The topics addressed include: Crack driving force (CDF) and failure assessment diagram (FAD) type analyses Preparation of the input parameters (crack dimensions, stress-strain properties, fracture toughness, statistical aspects) Determination of the model parameters, (stress intensity factor and yield load solutions) Treatment of combined primary and secondary loading, together with residual stress effects Analysis of the effect of constraint effects (treatment of small defects and section size effects) Treatment of mixed mode loading Consideration of the influences of strength mismatch Reliability aspects

Key Features

  • Comprehensive description of the use of structural integrity methods to optimise cost effectiveness and safety
  • Detailed description of how to evaluate the integrity of structures containing cracks
  • Valuable background information for understanding the methods, their potential and limitations
  • Large number of worked examples, which demonstrate all aspects of the methods
  • Descriptive, readable writing style
  • Applicable to a wide range of interests, from the student (university or self study) to the expert who requires a 'state of the art' document

Readership

University researchers (materials, engineering, mechanics). Researchers in interdisciplinary areas of structural integrity, damage tolerance, failure analysis, NDT. Practitioners in industry such as energy supply, aerospace, chemistry, petrochemicals, pipelines, offshore structures, railways.

Table of Contents

  • 1. INTRODUCTION
    1.1 SINTAP
    1.2 FITNET
    1.3 The Topic of the Present Book

    2. BRIEF OVERVIEW ON THE DEVELOPMENT OF FLAW ASSESSMENT
    2.1 General Aspects
    2.2 Ligament yielding
    2.3 The TWI Design Curve Approach
    2.4 The Early FAD Approach of CEGB
    2.5 The EPRI Approach
    2.6 The Reference Stress Method of CEGB
    2.7 The R6-Revision 3 Approach of CEGB
    2.8 The ETM Approach of GKSS
    2.9 The SINTAP Approach

    3. BASIC FEATURES OF SINTAP/FITNET
    3.1 Fitness-for-Service
    3.2 Potential Tasks of a SINTAP/FITNET Analysis
    3.3 Multi-Optional Concept
    3.4 FAD Versus CDF Analyses
    3.5 Integrated Concept

    4. THE INPUT PARAMETERS
    4.1 Loading Input Parameters
    4.2 Flaw Characterisation
    4.3 Deformation Characteristics of the Material
    4.4 Toughness Characteristics of the Material

    5. THE MODEL PARAMETERS
    5.1 The Stress Intensity Factor (K Factor)
    5.2 Net Section Yield Load FY, Reference Stress and Ligament Yielding

    6. STRUCTURAL ASSESSMENT
    6.1 Acceptable or Critical Conditions of a Component
    6.2 Assessment Based on the FAD Philosophy
    6.3 Assessment Based on the CDF Philosophy
    6.4 The f(Lr) Function According to the Different Analysis Levels
    6.5 Examples of SINTAP/FITNET Analyses
    6.6. Combined Primary and Secondary Stresses
    6.7 Constraint Effects
    6.8 Mixed Mode Loading
    6.9 Rapid Loading and crack arrest
    6.10 Thin Wall Structures
    6.11 Strength Mismatch
    6.12 Weld shape imperfections
    6.13 Reliability Aspects and Significance of the Results
    6.14 Potential Benefit of Applying Advanced Options and Modules

    7. VALIDATION EXAMPLES

    8. REFERENCES

    9. APPENDIX: Fracture Toughness Test Standards

    10. GLOSSARY

Product details

  • No. of pages: 320
  • Language: English
  • Copyright: © Academic Press 2007
  • Published: September 12, 2007
  • Imprint: Academic Press
  • eBook ISBN: 9780080552835

About the Authors

Uwe Zerbst

Affiliations and Expertise

Bundesanstalt für Materialforschung und Prüfung (BAM), Berlin, Germany

Manfred Schödel

Affiliations and Expertise

ALSTOM Baden

Stephen Webster

Affiliations and Expertise

CORUS RD&T, UK

Robert Ainsworth

Affiliations and Expertise

British Energy Generation Limited, Gloucester, UK

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