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Title: Verification of experimental dynamic strength methods with atomistic ramp-release simulations

Abstract

Material strength and moduli can be determined from dynamic high-pressure ramp-release experiments using an indirect method of Lagrangian wave profile analysis of surface velocities. This method, termed self-consistent Lagrangian analysis (SCLA), has been difficult to calibrate and corroborate with other experimental methods. Using nonequilibrium molecular dynamics, we validate the SCLA technique by demonstrating that it accurately predicts the same bulk modulus, shear modulus, and strength as those calculated from the full stress tensor data, especially where strain rate induced relaxation effects and wave attenuation are small. We show here that introducing a hold in the loading profile at peak pressure gives improved accuracy in the shear moduli and relaxation-adjusted strength by reducing the effect of wave attenuation. When rate-dependent effects coupled with wave attenuation are large, we find that Lagrangian analysis overpredicts the maximum unload wavespeed, leading to increased error in the measured dynamic shear modulus. Furthermore, these simulations provide insight into the definition of dynamic strength, as well as a plausible explanation for experimental disagreement in reported dynamic strength values.

Authors:
 [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1444091
Alternate Identifier(s):
OSTI ID: 1436002
Report Number(s):
SAND-2018-5914J
Journal ID: ISSN 2475-9953; PRMHAR; 663695; TRN: US1900970
Grant/Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 2; Journal Issue: 5; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Moore, Alexander P., Brown, Justin L., Lim, Hojun, and Lane, J. Matthew D. Verification of experimental dynamic strength methods with atomistic ramp-release simulations. United States: N. p., 2018. Web. doi:10.1103/PhysRevMaterials.2.053601.
Moore, Alexander P., Brown, Justin L., Lim, Hojun, & Lane, J. Matthew D. Verification of experimental dynamic strength methods with atomistic ramp-release simulations. United States. doi:10.1103/PhysRevMaterials.2.053601.
Moore, Alexander P., Brown, Justin L., Lim, Hojun, and Lane, J. Matthew D. Fri . "Verification of experimental dynamic strength methods with atomistic ramp-release simulations". United States. doi:10.1103/PhysRevMaterials.2.053601. https://www.osti.gov/servlets/purl/1444091.
@article{osti_1444091,
title = {Verification of experimental dynamic strength methods with atomistic ramp-release simulations},
author = {Moore, Alexander P. and Brown, Justin L. and Lim, Hojun and Lane, J. Matthew D.},
abstractNote = {Material strength and moduli can be determined from dynamic high-pressure ramp-release experiments using an indirect method of Lagrangian wave profile analysis of surface velocities. This method, termed self-consistent Lagrangian analysis (SCLA), has been difficult to calibrate and corroborate with other experimental methods. Using nonequilibrium molecular dynamics, we validate the SCLA technique by demonstrating that it accurately predicts the same bulk modulus, shear modulus, and strength as those calculated from the full stress tensor data, especially where strain rate induced relaxation effects and wave attenuation are small. We show here that introducing a hold in the loading profile at peak pressure gives improved accuracy in the shear moduli and relaxation-adjusted strength by reducing the effect of wave attenuation. When rate-dependent effects coupled with wave attenuation are large, we find that Lagrangian analysis overpredicts the maximum unload wavespeed, leading to increased error in the measured dynamic shear modulus. Furthermore, these simulations provide insight into the definition of dynamic strength, as well as a plausible explanation for experimental disagreement in reported dynamic strength values.},
doi = {10.1103/PhysRevMaterials.2.053601},
journal = {Physical Review Materials},
number = 5,
volume = 2,
place = {United States},
year = {2018},
month = {5}
}

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    Works referencing / citing this record:

    Fast Parallel Algorithms for Short-Range Molecular Dynamics
    journal, March 1995


    New applications for tantalum and tantalum alloys
    journal, March 2000


    High strain rate deformation behaviors of kinetic energy penetrator materials during ballistic impact
    journal, March 1994


    High-pressure strength of aluminum under quasi-isentropic loading
    journal, April 2009


    Sintering of nanophase WC–15vol.%Co hard metals by rapid sintering process
    journal, July 2004

    • Kim, Hwan-Cheol; Oh, Dong-Young; Shon, In-Jin
    • International Journal of Refractory Metals and Hard Materials, Vol. 22, Issue 4-5
    • DOI: 10.1016/j.ijrmhm.2004.06.006

    Intermittent dislocation flow in viscoplastic deformation
    journal, April 2001

    • Miguel, M. -Carmen; Vespignani, Alessandro; Zapperi, Stefano
    • Nature, Vol. 410, Issue 6829
    • DOI: 10.1038/35070524

    Probing the character of ultra-fast dislocations
    journal, November 2015

    • Ruestes, C. J.; Bringa, E. M.; Rudd, R. E.
    • Scientific Reports, Vol. 5, Issue 1
    • DOI: 10.1038/srep16892

    Dislocation Velocities, Dislocation Densities, and Plastic Flow in Lithium Fluoride Crystals
    journal, February 1959

    • Johnston, W. G.; Gilman, J. J.
    • Journal of Applied Physics, Vol. 30, Issue 2
    • DOI: 10.1063/1.1735121

    Effect of initial properties on the flow strength of aluminum during quasi-isentropic compression
    journal, April 2008

    • Asay, J. R.; Ao, T.; Davis, J. -P.
    • Journal of Applied Physics, Vol. 103, Issue 8
    • DOI: 10.1063/1.2902855

    Yield strength of tantalum for shockless compression to 18 GPa
    journal, October 2009

    • Asay, J. R.; Ao, T.; Vogler, T. J.
    • Journal of Applied Physics, Vol. 106, Issue 7
    • DOI: 10.1063/1.3226882

    A self‐consistent technique for estimating the dynamic yield strength of a shock‐loaded material
    journal, July 1978

    • Asay, J. R.; Lipkin, J.
    • Journal of Applied Physics, Vol. 49, Issue 7
    • DOI: 10.1063/1.325340

    Rise‐time measurements of shock transitions in aluminum, copper, and steel
    journal, April 1979

    • Chhabildas, Lalit C.; Asay, James R.
    • Journal of Applied Physics, Vol. 50, Issue 4
    • DOI: 10.1063/1.326236

    Unloading and reloading response of shocked aluminum single crystals: Time-dependent anisotropic material description
    journal, November 2012

    • Winey, J. M.; Johnson, J. N.; Gupta, Y. M.
    • Journal of Applied Physics, Vol. 112, Issue 9
    • DOI: 10.1063/1.4765012

    Extracting strength from high pressure ramp-release experiments
    journal, December 2013

    • Brown, J. L.; Alexander, C. S.; Asay, J. R.
    • Journal of Applied Physics, Vol. 114, Issue 22
    • DOI: 10.1063/1.4847535

    Flow strength of tantalum under ramp compression to 250 GPa
    journal, January 2014

    • Brown, J. L.; Alexander, C. S.; Asay, J. R.
    • Journal of Applied Physics, Vol. 115, Issue 4
    • DOI: 10.1063/1.4863463

    Shockless compression and release behavior of beryllium to 110 GPa
    journal, July 2014

    • Brown, J. L.; Knudson, M. D.; Alexander, C. S.
    • Journal of Applied Physics, Vol. 116, Issue 3
    • DOI: 10.1063/1.4890232

    Fracture and strength of solids
    journal, January 1949


    Visualization and analysis of atomistic simulation data with OVITO–the Open Visualization Tool
    journal, December 2009


    Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene
    journal, July 2008


    Laser Techniques in High-Pressure Geophysics
    journal, August 1987


    A General Theory of Strength for Anisotropic Materials
    journal, January 1971