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AFGROW | DTD Handbook

Handbook for Damage Tolerant Design

  • DTDHandbook
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    • Sections
      • 1. Introduction
      • 2. Fundamentals of Damage Tolerance
      • 3. Damage Size Characterizations
        • 0. Damage Size Characterizations
        • 1. NDI Demonstration of Crack Detection Capability
          • 0. NDI Demonstration of Crack Detection Capability
          • 2. NDI Capability Evaluation for Cracks
          • 3. NDI Capability Evaluation for Corrosion
        • 2. Equivalent Initial Quality
        • 3. Proof Test Determinations
        • 4. References
      • 4. Residual Strength
      • 5. Analysis Of Damage Growth
      • 6. Examples of Damage Tolerant Analyses
      • 7. Damage Tolerance Testing
      • 8. Force Management and Sustainment Engineering
      • 9. Structural Repairs
      • 10. Guidelines for Damage Tolerance Design and Fracture Control Planning
      • 11. Summary of Stress Intensity Factor Information
    • Examples

Section 3.1.0. NDI Demonstration of Crack Detection Capability

Non-destructive inspection (NDI) methods are commonly used to determine the condition of a structure during production and at in-service inspections.  Detailed descriptions of the principles and use of these methods are generally available (see, for example, Nondestructive Testing Handbook, Volume Ten [1996]).  The objectives of this subsection are to briefly describe and compare the common NDI methods and to discuss the statistically based demonstration programs that are required to quantify the detection capability of an NDI system.  A distinction between inspections for cracks and for corrosion is made for capability evaluations even though the physical principles of the techniques are common.