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Application of Fracture Mechanics to Prevention and Control of Subcritical Crack Growth and Fracture in Advanced High-Performance Ship Structures

  • R. J. Goode
  • R. W. Judy
Chapter
Part of the Sagamore Army Materials Research Conference Proceedings book series (SAMC)

Abstract

Advanced surface craft and ships such as hydrofoils and surface-effect ships represent one area in the ship structures design field where fracture mechanics must be applied for prevention of fracture and control of crack growth. These vehicles feature the unique problem of weight-critical, monolithic structures fabricated of high-strength metals operating in an aggressive environment at exceptionally high levels of performance.

The integrity of high-performance surface craft and ships depends on both the resistance to propagation of cracks and resistance to fracture of the structural material. Design procedures based on engineering application of fracture mechanics principles to assure structural integrity have been established. These procedures enable designers to systematically take into account applicable metal crack tolerance parameters and their relation to structural performance. The three-part Ratio Analysis Diagram (RAD) system, developed to provide an analysis technique for determining the significance of stress-corrosion cracking, sustained load cracking, and fracture in terms of critical flaw size and stress level, is presented. Considerations on the effects of electrochemical coupling on corrosion fatigue and stress-corrosion cracking are also discussed.

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Copyright information

© Springer Science+Business Media New York 1979

Authors and Affiliations

  • R. J. Goode
    • 1
  • R. W. Judy
    • 1
  1. 1.Naval Research LaboratoryUSA

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