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Methods of analysis and solutions of crack problems

Recent developments in fracture mechanics Theory and methods of solving crack problems

  • George C. Sih
Book

Part of the Mechanics of fracture book series (MEFA, volume 1)

Table of contents

  1. Front Matter
    Pages I-XLV
  2. J. P. Benthem, W. T. Koiter
    Pages 131-178
  3. R. J. Hartranft, G. C. Sih
    Pages 179-238
  4. I. N. Sneddon
    Pages 315-367
  5. F. Erdogan, G. D. Gupta, T. S. Cook
    Pages 368-425
  6. Back Matter
    Pages 516-517

About this book

Introduction

It is weH known that the traditional failure criteria cannot adequately explain failures which occur at a nominal stress level considerably lower than the ultimate strength of the material. The current procedure for predicting the safe loads or safe useful life of a structural member has been evolved around the discipline oflinear fracture mechanics. This approach introduces the concept of a crack extension force which can be used to rank materials in some order of fracture resistance. The idea is to determine the largest crack that a material will tolerate without failure. Laboratory methods for characterizing the fracture toughness of many engineering materials are now available. While these test data are useful for providing some rough guidance in the choice of materials, it is not clear how they could be used in the design of a structure. The understanding of the relationship between laboratory tests and fracture design of structures is, to say the least, deficient. Fracture mechanics is presently at astandstill until the basic problems of scaling from laboratory models to fuH size structures and mixed mode crack propagation are resolved. The answers to these questions require some basic understanding ofthe theory and will not be found by testing more specimens. The current theory of fracture is inadequate for many reasons. First of aH it can only treat idealized problems where the applied load must be directed normal to the crack plane.

Keywords

fracture fracture mechanics mechanics resistance structure

Editors and affiliations

  • George C. Sih
    • 1
  1. 1.Department of Mechanical Engineering and MechanicsLehigh UniversityBethlehemUSA

Bibliographic information

  • DOI https://doi.org/10.1007/978-94-017-2260-5
  • Copyright Information Springer Science+Business Media B.V. 1973
  • Publisher Name Springer, Dordrecht
  • eBook Packages Springer Book Archive
  • Print ISBN 978-90-481-8246-6
  • Online ISBN 978-94-017-2260-5
  • Buy this book on publisher's site
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