K Calibration for 'C' Shaped Fracture Toughness Specimens of Various Geometries.
Abstract
Prior collocation results are combined with new collocation data and analyzed using two parameter data approximation methods and fracture mechanics methods. A general K calibration is obtained for 'C' shaped specimens which have outer to inner radius ratios, W = r sub 2/r sub 1, between 1.4 and 2.5. The K calibration for 'C' shaped specimens is found to depend on the load eccentricity to specimen thickness ratio, x/t, as well as the usual crack depth to specimen thickness ratio, a/t. The K results are presented as tabular and plotted values from a cubic spline surface used to approximate the collocation data and as a polynomial approximation of the collocation data over a more limited range of x/t. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1973
- Accession Number
- AD0761102
Entities
People
- D. P. Kendall
- J. H. Underwood
- R. D. Scanlon