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László TÓTH, Nóra SZŰCS Szabolcs SZÁVAI

Handbook of the Crack Propagation sensitivity Index. László TÓTH, Nóra SZŰCS Szabolcs SZÁVAI. Level of. SAFETY. The Basic Terms of Technical-Economic Life. Safety Reliability Risk Costs. At a given technical level !!. Paul GAUGUIN , 1897 (Boston, Museum of Fine Arts).

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László TÓTH, Nóra SZŰCS Szabolcs SZÁVAI

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  1. Handbook of the Crack Propagation sensitivity Index László TÓTH, Nóra SZŰCS Szabolcs SZÁVAI

  2. Level of SAFETY The Basic Terms of Technical-Economic Life Safety Reliability Risk Costs

  3. At a given technical level !!

  4. Paul GAUGUIN, 1897 (Boston, Museum of Fine Arts) Where We come from? What We Are? Where we are going?

  5. The Driving Forces of Development

  6. NDE Background 2006 1950

  7. K, J, G CPSI Crack Size Crack Propagation Sensitivity IndexConcept K-a Crack Growth Resistance Safety Factor dK/da UNIT

  8. Component1 Component2 Required NDE reliability Crack size KIc Stress Intensity Factor

  9. loading conditions, • flaw location, • flawgeometry CPSI= f K=.f(a,geometry) CPSI  CPSI=dK/da= .{[f(a,geometry)]/da}

  10. Example 1 CYLINDERUNDER INTERNAL PRESSURE WITH AXIAL CRACK Through-Thickness Crack

  11. Derivate Functions ,

  12. Example 2 SPHERICAL SHELL UNDER INTERNAL PRESSURE WITH CRACK Embedded Elliptical Crack (Centred)

  13. Derivate Functions

  14. More illustration

  15. The derivate functions are ready yet: • For 74 cases including: • Plates • Pipes and Cylinders • Spherical sells and Spheres • Round bars and bolts • Component with hole • The software for calculating the CPSI=dK/da for 12 cases including: • Plates • Pipes and Cylinders

  16. CONCLUSIONS The integrity of the structures can be evaluated at a given technical level The CPSI concept is the only tool to link the safety requirement of a structure and the NDE requirements Introducing the CPSI concept a COST EFFECTIVE NDE can be achieved Collection of the K-solutions, i.e the K vs. crack geometry (size) in a handbook Preparation of their derivative functions

  17. Further Tasks Preparation ofmore derivative function Preparation ofa guideline for the given type of component (tubes, vessels, turbine blades, etc) Optimization of NDE (method, personnel, equipment, etc.)

  18. Zoltán Bay (1900 - 1992) • He measured the distance between the Earth and theMoon using micro-wave technology (1946),Radar Astronomy • Re-definition of the unit of the distance, meter (1965-1983)

  19. Thank you for your kind attention

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