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Elastic-Plastic Fracture Mechanics (EPFM) and Applications

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Fracture Mechanics of Metals, Composites, Welds, and Bolted Joints

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Abstract

As discussed in Chapters 2 and 3, the application of the LEFM approach to structural life assessment is limited to a low load environment where the bulk of the structure is elastic and crack tip plastic deformation is highly localized. In many structural parts that are made of low-strength, tough material, however, an appreciable amount of crack tip plastic deformation and stable crack growth (also called stable tearing or simply tearing) can occur prior to instability. Application of the LEFM theory, using the stress intensity factor, K, is not adequate to characterize the crack tip field behavior in the presence of large yielding and extensive stable crack growth. Fracture mechanics concepts other than the LEFM approach are therefore necessary to address structural integrity analysis of components that are ductile. Two fracture mechanics approaches are discussed in this book for the analysis of tough metals used in building aerospace, aircraft, and nuclear structures, where fracture behavior often extends beyond the elastic dominant regime. The first approach is called the Elastic-Plastic Fracture Mechanics (EPFM) theory and it uses the J-Integral concept first proposed by Rice (1968) as a path independent integral for characterizing crack tip stresses and strains [1].

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Authors
  1. Bahram Farahmand Ph.D.
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© 2001 Springer Science+Business Media New York

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Farahmand, B. (2001). Elastic-Plastic Fracture Mechanics (EPFM) and Applications. In: Fracture Mechanics of Metals, Composites, Welds, and Bolted Joints. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-1585-2_4

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  • DOI: https://doi.org/10.1007/978-1-4615-1585-2_4

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-5627-1

  • Online ISBN: 978-1-4615-1585-2

  • eBook Packages: Springer Book Archive

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