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Research and development program for the development of advanced time-temperature dependent constitutive relationships. Volume 1 : Theoretical discussion

Author
Cassenti, B. N.
Published
Jul 1, 1983.
Physical Description
1 electronic document
Online Version

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Summary
The results of a 10-month research and development program for the development of advanced time-temperature constitutive relationships are presented. The program included (1) the effect of rate of change of temperature, (2) the development of a term to include time independent effects, and (3) improvements in computational efficiency. It was shown that rate of change of temperature could have a substantial effect on the predicted material response. A modification to include time-independent effects, applicable to many viscoplastic constitutive theories, was shown to reduce to classical plasticity. The computation time can be reduced by a factor of two if self-adaptive integration is used when compared to an integration using ordinary forward differences. During the course of the investigation, it was demonstrated that the most important single factor affecting the theoretical accuracy was the choice of material parameters.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19840002545.
Accession ID: 84N10613.
NASA-CR-168191-VOL-1.
R83-956077-1.
NAS 1.26:168191-VOL-1.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15711240