EFFECT OF STATE OF STRESS ON THE FAILURE OF METALS AT VARIOUS TEMPERATURES
Abstract
Experimental observations of initial yielding, strain hardening, and fracture of Zamak-3 tubes for various states of combined stress are presented. Testing temperatures of 32 and 78 F were employed. These observations are compared with predictions of R. von Mises (Keitschrift fur Angew. Math. und Mech., 8:161-185, 1928) Tresca, and maximum reduced stress theories of initial yielding and with isotropic and kinematic theories of strain-hardening. Fracture data are compared with the Griffith theory of rupture for brittle materials. It is concluded that Zamak-3 behaves as an essentially isotropic material in which yielding is independent of mean stress. Multiple loading path test results agree rather well with the predictions of kinematic hardening theory in conjunction with the Tresca yield criterion. Fracture results conform to a maximum normal stress theory which coincides with the Griffith theory for the stress combinations investigated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1962
- Accession Number
- AD0278746
Entities
People
- D. R. Jenkins
- R. M. Haythornthwaite
Organizations
- University of Michigan