A degradation function consistent with Cocks–Ashby porosity kinetics

Moore, John A.

doi:10.1007/s10704-017-0247-6

A degradation function consistent with Cocks–Ashby porosity kinetics

Journal Article · Sat Oct 14 00:00:00 EDT 2017 · International Journal of Fracture

DOI:https://doi.org/10.1007/s10704-017-0247-6· OSTI ID:1438703

Moore, John A. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

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.

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1438703

Report Number(s):: LLNL-JRNL--730381

Journal Information:: International Journal of Fracture, Journal Name: International Journal of Fracture Journal Issue: 1-2 Vol. 209; ISSN 0376-9429

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
Damage
Degradation function
Ductile fracture
Porosity
Strain-rate dependence

A degradation function consistent with Cocks–Ashby porosity kinetics

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References (13)

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