SUMMARY OF SOME STUDIES OF BRITTLE-FRACTURE PROPAGATION.
Abstract
Six-foot-wide plain plate specimens tested at an average applied stress of about 20 ksi, a temperature of 0 F, and with the notch-wedgeimpact method of initiation, produced fracture speeds in the range of 2000 to 4000 fps. Sixfoot-wide prestressed steel plates with a region of high tensile residual strain at each edge, and a region of residual compression in the central portion, tested at zero or 3 ksi average applied stress, at 0 F, and with impact initiation, produced fracture speeds of 6000 fps in the tensile zone near the initiation source, and speeds as low as 50 fps. Two-foot-wide centrally notched and welded specimens fabricated in different ways and tested at an average applied stress of about 10 ksi and a temperature of -40 F, produced speed within 1 1/2 inches of the initiation source and in a region of high residual tensile stress as high as 5000 fps; whereas speeds throughout the remainder of the specimen, which initially possessed a low compressive residual stress, were on the order of 1800 fps. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 04, 1963
- Accession Number
- AD0424986
Entities
People
- F. W. Barton
- W. J. Hall
Organizations
- University of Illinois Urbana–Champaign