ASSESSMENT OF THEORIES OF FLOW AND FRACTURE.
Abstract
Experimental initial yield, strain hardening, and fracture data for arccast unalloyed molybdenum tubular specimens are compared with simple theoretical models. The tubular specimens were subjected to various combinations of axial force and internal pressure at testing temperatures of 75F and 212F. Initial yield data are in fairly good agreement with a maximum reduced stress yield criterion which accounts for axially symmetric anisotropy. The theory of kinematic hardening gave good predictions of subsequent yield values during strain hardening for the 75F data. For tests at 212F, markedly poorer predictions of subsequent yield were given. A maximum normal stress theory of fracture was in fair agreement with experimental data. Data are also presented on the behavior of cantilever beams made of Zamak-3 zinc alloy. Strain hardening in Zamak-3 had been investigated previously. These results are in reasonably good agreement with a theoretical load-tip deflection relationship based on an elastic-linear strain hardening model. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1964
- Accession Number
- AD0603497
Entities
People
- D. R. Jenkins
- R. M. Haythornthwaite
Organizations
- University of Michigan