Analytical Fracture Mechanics

  • Crack driving force (static and dynamic)
    • elastic
    • elastic-plastic
    • elastic-viscoplastic
  • Crack growth prediction in structures and components
    • stable-tearing/instability
    • dynamic crack initiation/growth/arrest
    • fatigue (including weld, notch, spectrum, and block loading effects)
    • environmentally assisted cracking
    • creep crack growth
    • creep-fatigue crack growth
    • simulation/optimization of proof testing
  • Applications
    • airframe/aerospace structures
    • gas turbines
    • steam turbines/electric generators
    • pressure vessels
    • CNG/LNG storage
    • offshore structures
    • petrochemical components

Experimental Fracture Mechanics

  • Fracture toughness
    • static (KIC, JIC)
    • dynamic ( KID, Kid to K=106MPa m1/2/s
    • arrest ( KIA, KIa)
    • stable tearing (K- and J-resistance curves)
  • Subcritical crack growth
    • fatigue/corrosion-fatigue
    • environmentally assisted (KIscc)
    • stress corrosion
    • creep
    • creep-fatigue

Measurements of high temperature creep crack growth properties of Class C and D turbine rotor materials are obtained to contribute to a database used in remaining life assessment of HP and IP rotors.

For more information on materials and structures, contact Dr. Ben H. Thacker, Mechanical Engineering Division, Southwest Research Institute, P.O. Drawer 28510, San Antonio, Texas 78228-0510, Phone (210) 522-3896, Fax (210) 522-6965.

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