Comparison between the rate and temperature dependent plasticity models of Bammann and of Kocks and Mecking

Technical Report · Thu Jun 01 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/6227444· OSTI ID:6227444

Follansbee, P. S.

The strain-rate and temperature dependent plasticity model of Bammann, as implemented in the PRONTO FEM code, is compared with the model of Kocks and Mecking. It is shown that simplified versions of both models can be directly compared. Both models separate the temperature and strain-rate dependent yield stress (in a well annealed condition) from the temperature and strain-rate dependent strain hardening contribution. Equations are derived for the conversion from parameters describing a fit of data to the Kocks and Mecking model to parameters describing a fit to the Bammann model. The application of the results to measurements in U-0.75 Ti and a W-Ni-Fe alloy is presented. 7 refs., 5 figs., 2 tabs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6227444
• Report Number(s): LA-11588-MS; ON: DE89013655
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
99 GENERAL AND MISCELLANEOUS
990230 -- Mathematics & Mathematical Models-- (1987-1989)
ACTINIDE ALLOYS
ALLOYS
COMPARATIVE EVALUATIONS
COMPUTER CODES
HARDENING
IRON ALLOYS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
NICKEL ALLOYS
PLASTICITY
STRAIN HARDENING
STRESSES
TEMPERATURE DEPENDENCE
TITANIUM ALLOYS
TUNGSTEN ALLOYS
URANIUM ALLOYS