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The constitutive representation of high-temperature creep damageThe elastic-viscoplastic constitutive equations of Bodner-Partom were applied to modeling creep damage in a high temperature Ni-alloy, B1900 + Hf. Both tertiary creep in bulk materials and creep crack growth in flawed materials were considered. In the latter case, the energy rate line integral was used for characterizing the crack driving force, and the rate of crack extension was computed using a local damage formulation that assumed fracture was controlled by cavitation occurring within the crack-tip process zone. The results of this investigation were used to assess the evolution equation for isotropic damage utilized in the Bodner-Partom constitutive equations.
Document ID
19890030025
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chan, K. S.
(Southwest Research Institute San Antonio, TX, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Publication Information
Publication: International Journal of Plasticity
Volume: 4
Issue: 4 19
ISSN: 0749-6419
Subject Category
Structural Mechanics
Accession Number
89A17396
Funding Number(s)
CONTRACT_GRANT: NAS3-23925
Distribution Limits
Public
Copyright
Other

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