A degradation function consistent with Cocks–Ashby porosity kinetics
Abstract
Here, the load carrying capacity of ductile materials degrades as a function of porosity, stress state and strain-rate. The effect of these variables on porosity kinetics is captured by the Cocks–Ashby model; however, the Cocks–Ashby model does not account for material degradation directly. This work uses a yield criteria to form a degradation function that is consistent with Cocks–Ashby porosity kinetics and is a function of porosity, stress state and strain-rate dependence. Approximations of this degradation function for pure hydrostatic stress states are also explored.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1438703
- Report Number(s):
- LLNL-JRNL-730381
Journal ID: ISSN 0376-9429
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal of Fracture
- Additional Journal Information:
- Journal Volume: 209; Journal Issue: 1-2; Journal ID: ISSN 0376-9429
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 36 MATERIALS SCIENCE; Degradation function; Porosity; Damage; Ductile fracture; Strain-rate dependence
Citation Formats
Moore, John A. A degradation function consistent with Cocks–Ashby porosity kinetics. United States: N. p., 2017.
Web. doi:10.1007/s10704-017-0247-6.
Moore, John A. A degradation function consistent with Cocks–Ashby porosity kinetics. United States. doi:10.1007/s10704-017-0247-6.
Moore, John A. Sat .
"A degradation function consistent with Cocks–Ashby porosity kinetics". United States. doi:10.1007/s10704-017-0247-6. https://www.osti.gov/servlets/purl/1438703.
@article{osti_1438703,
title = {A degradation function consistent with Cocks–Ashby porosity kinetics},
author = {Moore, John A.},
abstractNote = {Here, the load carrying capacity of ductile materials degrades as a function of porosity, stress state and strain-rate. The effect of these variables on porosity kinetics is captured by the Cocks–Ashby model; however, the Cocks–Ashby model does not account for material degradation directly. This work uses a yield criteria to form a degradation function that is consistent with Cocks–Ashby porosity kinetics and is a function of porosity, stress state and strain-rate dependence. Approximations of this degradation function for pure hydrostatic stress states are also explored.},
doi = {10.1007/s10704-017-0247-6},
journal = {International Journal of Fracture},
number = 1-2,
volume = 209,
place = {United States},
year = {2017},
month = {10}
}
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