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Techniques for Multiaxial Creep Testing

  • D. J. Gooch
  • I. M. How

Table of contents

  1. Front Matter
    Pages i-xvi
  2. Data Requirements

  3. Biaxial Testing

    1. Front Matter
      Pages 29-29
    2. W. Trąmpczyński, Z. Kowalewski
      Pages 79-92
    3. P. Delobelle, D. Varchon, C. Oytana
      Pages 93-101
    4. M. S. Shammas, K. D. Marchant
      Pages 103-109
    5. C. J. Morrison
      Pages 111-126
  4. Triaxial Testing

  5. Pressurised Tubes and Components

    1. Front Matter
      Pages 243-243
    2. M. Rödig, W. Hannen, H. Hellwig, J. Klomfass
      Pages 295-304
    3. K. Rae, J. T. Boyle, J. Spence
      Pages 305-310
    4. M. C. Coleman, R. Fidler, J. A. Williams
      Pages 333-356
  6. Back Matter
    Pages 357-360

About this book

Introduction

The design and assessment of modern high temperature plant demands an understanding of the creep and rupture behaviour of materials under multi axial stress states. Examples include thread roots in steam turbine casing bolts, branch connections in nuclear pressure vessels and blade root fixings in gas or steam turbine rotors. At one extreme the simple notch weakening/notch strengthening characterization of the material by circumferentially vee-notched uniaxial rupture tests, as specified in many national standards, may be sufficient. These were originally intended to model thread roots and their conservatism is such that they frequently are considered adequate for design purposes. At the other extreme full size or model component tests may be employed to determine the safety margins built into design codes. This latter approach is most commonly used for internally pressurized components, particularly where welds are involved. However, such tests are extremely expensive and the use of modern stress analysis techniques combined with a detailed knowledge of multiaxial properties offers a more economic alternative. Design codes, by their nature, must ensure conservatism and are based on a material's minimum specified properties. In the case of high temperature components the extension of life beyond the nominal design figure, say from 100000 to 200000 h, offers very significant economic benefits. However, this may require a more detailed understanding of the multiaxial behaviour of a specific material than was available at the design stage.

Keywords

alloy computer damage design distribution machine materials modeling nature pressure safety stress structure surface testing

Editors and affiliations

  • D. J. Gooch
    • 1
  • I. M. How
    • 2
  1. 1.CEGB, Central Electricity Research LaboratoriesLeatherheadUK
  2. 2.ERA Technology LtdLeatherheadUK

Bibliographic information

  • DOI https://doi.org/10.1007/978-94-009-3415-3
  • Copyright Information Springer Science+Business Media B.V. 1986
  • Publisher Name Springer, Dordrecht
  • eBook Packages Springer Book Archive
  • Print ISBN 978-94-010-8027-9
  • Online ISBN 978-94-009-3415-3
  • Buy this book on publisher's site