BRITTLE FRACTURE PROPAGATION STUDIES.
Abstract
This investigation was undertaken to study lowvelocity brittle fracture in wide steel plates. The detailed results of two tests of 6-ft-wide prestressed steel plates are prsented along with pertinent observations from tests of similar specimens; also, results of nineteen tests of 2-ft-wide centrally notched plates. In 6-ft-wide prestressed plates, the residual stress field (longitudinal tensile stresses at the edges of the plate balanced by compressive stresses throughout the central portion) made initiation possible with no external applied stress, and had a significant effect on the fracture propagation. Fracture speeds were high (4000-6000 fps) near the edges of the plates and decreased rapidly to as low as l65 fps as the fracture propagated into the region of compressive stresses. In the lowspeed regions the magnitude and extent of the dynamic strain field associated with the crack tip was considerably less than had been recorded in earlier tests of high-speed fractures in plain plates. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 20, 1963
- Accession Number
- AD0424985
Entities
People
- F. F. Videon
- F. W. Barton
- W. J. Hall
Organizations
- University of Illinois Urbana–Champaign