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DTD Handbook

Handbook for Damage Tolerant Design

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    • Sections
      • 1. Introduction
      • 2. Fundamentals of Damage Tolerance
      • 3. Damage Size Characterizations
      • 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
        • 0. Guidelines for Damage Tolerance Design and Fracture Control Planning
        • 1. Design Loads Spectrum
        • 2. Material Selection
          • 0. Material Selection
          • 1. Crack Growth Resistance and Fracture Toughness
          • 2. Material Property Control
        • 3. Structural Configuration Analysis
        • 4. Manufacturing Process
        • 5. References
      • 11. Summary of Stress Intensity Factor Information
    • Examples

Section 10.2.0. Material Selection

The selection of materials for damage tolerant design is one of the most important functions.  Materials must be evaluated and selected on both their static strength and their toughness and flaw growth characteristics.  The properties used for these comparisons are:

·        Yield strength, Fty

·        Ultimate strength, Ftu

·        Fracture toughness, Kc or KIC

·        Stress corrosion factor, KIscc

·        Crack growth rate, da/dN vs. DK

Figure 10.2.1 shows how some of these properties can be compared.  In addition, typical crack growth characteristics for each material are analyzed.

Text Box: Strength (ksi); KIC or KISCC (ksi Öin.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 10.2.1.  A Method of Presenting Comparative Material Data