Techniques for Multiaxial Creep Testing

Kids, Natural World, Nonfiction, Reference & Language, Education & Teaching, Science & Nature, Science
Cover of the book Techniques for Multiaxial Creep Testing by , Springer Netherlands
View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart
Author: ISBN: 9789400934153
Publisher: Springer Netherlands Publication: December 6, 2012
Imprint: Springer Language: English
Author:
ISBN: 9789400934153
Publisher: Springer Netherlands
Publication: December 6, 2012
Imprint: Springer
Language: English

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.

View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart

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.

More books from Springer Netherlands

Cover of the book Infectious Agents and Cancer by
Cover of the book A Patient’s Guide to Dialysis and Transplantation by
Cover of the book Vagueness: A Guide by
Cover of the book The Argument of Mathematics by
Cover of the book Leadership, Gender, and Organization by
Cover of the book Quantitative Coronary Arteriography by
Cover of the book Questions and Answers by
Cover of the book Marine Clastic Sedimentology by
Cover of the book High Performance Polymers: Their Origin and Development by
Cover of the book Arguments, Stories and Criminal Evidence by
Cover of the book ‘In Considerable Variety’: Introducing the Diversity of Australia’s Insects by
Cover of the book Structural Biology and Functional Genomics by
Cover of the book ROV ’86: Remotely Operated Vehicles by
Cover of the book The Origins of Life by
Cover of the book Philosophical Papers and Letters by
We use our own "cookies" and third party cookies to improve services and to see statistical information. By using this website, you agree to our Privacy Policy