A degradation function consistent with Cocks–Ashby porosity kinetics

Moore, John A.

doi:10.1007/s10704-017-0247-6

Title: 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:

Moore, John A. ^[1]

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

Publication Date:: 2017-10-14

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.

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                    Moore, John A. A degradation function consistent with Cocks–Ashby porosity kinetics.  United States.  doi:https://doi.org/10.1007/s10704-017-0247-6

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                    Moore, John A. Sat .  
        "A degradation function consistent with Cocks–Ashby porosity kinetics".  United States.  doi:https://doi.org/10.1007/s10704-017-0247-6.  https://www.osti.gov/servlets/purl/1438703.

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@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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DOI: https://doi.org/10.1007/s10704-017-0247-6

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Works referenced in this record:

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Similar Records

Title: A degradation function consistent with Cocks–Ashby porosity kinetics

Abstract

Citation Formats

The constitutive law of nonlinear viscous and porous materials journal, May 1992

Inelastic deformation of porous materials journal, January 1989

A note on the thermal effects upon a Gurson-type material model journal, February 2015

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Intergranular fracture during power-law creep under multiaxial stresses journal, August 1980

Using high energy diffraction microscopy to assess a model for microstructural sensitivity in spall response journal, May 2014

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journal, May 1992

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A note on the thermal effects upon a Gurson-type material model
journal, February 2015

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journal, August 2015

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journal, January 1977

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Creep of Power-Law Material Containing Spherical Voids
journal, June 1992

Associative versus non-associative porous viscoplasticity based on internal state variable concepts
journal, January 1996

Constitutive potentials for dilutely voided nonlinear materials
journal, March 1984

Modeling ductile void growth in viscoplastic materials—Part I: Void growth model
journal, March 1993