Phenomenological model of in-pile stress relaxation (LWBR Development Program)
Technical Report
·
OSTI ID:6720379
A phenomenological deformation model for the analysis of uniaxial in-pile stress relaxation is developed from a reference creep model that was proposed by Hesketh. The basis of this creep model is that the inelastic in-pile strain consists of two separate components, one of which is an exponential type of transient strain and the other a steady-state type of strain, with both components being linear functions of stress and fast neutron flux. The assumption of a mechanical equation of state, combined with these creep strain characteristics, gives the Maxwell-Kelvin linear viscoelastic model for the description of in-pile stress relaxation. Equations are derived for uniaxial stress relaxation and some implications of the deformation model are discussed. (NSA 25: 55579)
- Research Organization:
- Bettis Atomic Power Lab., Pittsburgh, PA (USA)
- DOE Contract Number:
- AT(11-1)-GEN-14
- OSTI ID:
- 6720379
- Report Number(s):
- WAPD-TM-943
- Country of Publication:
- United States
- Language:
- English
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