Continuum Damage Mechanics Modeling of High-Temperature Flaw Propagation: Application to Creep Crack Growth In 316H Standardized Specimens and Nuclear Reactor Components
Journal Article
·
· Journal of Pressure Vessel Technology
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Kairos Power LLC, Alameda, CA (United States)
Predicting creep crack growth (CCG) of flaws found during operation in high-temperature alloy components is essential for assessing the remaining lifetime of those components. While defect assessment procedures are available for this purpose in design codes, these are limited in their range of applicability. This study assesses the application of a local damage-based finite-element methodology as a more general technique for the prediction of CCG at high temperatures on a variety of structural configurations. Numerical results for stainless steel 316H, which are validated against experimental data, show the promise of this approach. This integration of continuum damage mechanics (CDM) based methodologies, together with adequate inelastic models, into assessment procedures can therefore inform the characterization of CCG under complex operating conditions, while avoiding excessive conservatism. This article shows that such modeling frameworks can be calibrated to experimental data and used to demonstrate that the degree of tri-axiality ahead of a growing creep crack affects its rate of growth. The framework is also successfully employed in characterizing CCG in a realistic reactor pressure vessel geometry under an arbitrary loading condition. These results are particularly relevant to the nuclear power industry for defect assessment and inspections as part of codified practices of structural components with flaws in high-temperature reactors.
- Research Organization:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- U.S. Industry Opportunities for Advanced Nuclear Technology Development; USDOE Office of Nuclear Energy (NE), Nuclear Science User Facilities (NSUF)
- Grant/Contract Number:
- AC07-05ID14517
- OSTI ID:
- 1992084
- Report Number(s):
- INL/JOU-23-71598-Rev000
- Journal Information:
- Journal of Pressure Vessel Technology, Journal Name: Journal of Pressure Vessel Technology Journal Issue: 5 Vol. 145; ISSN 0094-9930
- Publisher:
- ASMECopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Engineering-scale Modeling of High-Temperature Creep and Creep Crack Growth in Alloy 316H
Creep and Creep Fracture Modeling with Surrogate Creep Models and the Extended Finite Element Method
Creep and Creep-Fatigue Crack Growth at Structural Discontinuities and Welds
Technical Report
·
Mon Jan 30 23:00:00 EST 2023
·
OSTI ID:2279160
Creep and Creep Fracture Modeling with Surrogate Creep Models and the Extended Finite Element Method
Technical Report
·
Fri Sep 27 00:00:00 EDT 2024
·
OSTI ID:2480345
Creep and Creep-Fatigue Crack Growth at Structural Discontinuities and Welds
Technical Report
·
Tue Jan 26 23:00:00 EST 2010
·
OSTI ID:974286