A STUDY OF THE EFFECT OF SUPERIMPOSED STRESS CONCENTRATIONS.
Abstract
The interaction effects of the stress fields of edge notches and holes or elongated slots have been studied by photoelasticity techniques, in an effort to obtain the basic information required for a fracture analysis of inhomogeneous brittle materials such as ceramics. Actual fracture tests on selected similar geometries were conducted on a brittle titanium alloy to provide an experimental check on the stress analysis and photoelastic work. Both one sided and mutual interaction of the stress fields of the edge notches and holes were observed and their occurrence depends upon the geometry and proximity of the two stress concentrators. The photoelastic results revealed that a simplified uniaxial stress distribution analysis predicts far larger interaction distances than were actually observed. Consideration of the stress field biaxiality together with a more accurate stress distribution analysis is required for a quantitative prediction of the observed effects. A unified interpretation of the interaction effects can be obtained from a graph of stress concentration factor increase versus the relative interflaw spacing xi/r, where r is the root radius of the neighboring notch. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1965
- Accession Number
- AD0476370
Entities
People
- A. Takimoto
- J. Sessler
- V. Weiss
Organizations
- Syracuse University