A Degradation Function Consistent with Cocks–Ashby Porosity Kinetics

Authors

John A. Moore, Marquette UniversityFollow

Document Type

Article

Language

eng

Publication Date

1-2018

Publisher

Springer

Source Publication

International Journal of Fracture

Source ISSN

0376-9429

Abstract

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.

Comments

Accepted version. International Journal of Fracture, Vol 209, No. 1/2 (January 2018): 231-234. DOI. © 2017 Springer Science+Business Media B.V. Used with permission.

John A. Moore was affiliated with Lawrence Livermore National Laboratory at the time of publication.

Recommended Citation

Moore, John A., "A Degradation Function Consistent with Cocks–Ashby Porosity Kinetics" (2018). Mechanical Engineering Faculty Research and Publications. 232.
https://epublications.marquette.edu/mechengin_fac/232