Influence of Three Dimensional Effects on the Stress Intensity Factor for Compact Tension Specimens.
Abstract
The stress freezing technique of photoelasticity was utilized to study the stress intensity variation between full thickness and center slices of compact tension specimens for various crack lengths. Specimen geometries covered an a/w range of 0.3 to 0.7 and for values of w/B of 2 and 3.5 Normalized SIF results for geometries within ASTM E 399-72 specifications (i.e. w/B = 2.0, a/w = 0.50) agreed with the ASTM solution to within experimental error. However, for a/w values outside the ASTM range (0.45 to 0.55), experimental results were measurably higher than the ASTM results for w/B = 2.0 and averaged 13% higher for all a/w studied at w/B 3.5. The center slice SIF was found to be 5 to 10% higher than the through the thickness average on all tests. (AN)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1973
- Accession Number
- ADA306196
Entities
People
- C. W. Smith
- M. A. Schroedl
Organizations
- Virginia Tech