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Title: Cyclic Plasticity under Shock Loading in an HCP Metal

Abstract

Plate impact experiments with pressures from 2 to 20 GPa, including one shock-partial release-reshock experiment, were performed on vacuum hot-pressed S-200F Beryllium. This hexagonal close-packed (HCP) metal shows significant plasticity effects in such conditions. The experiments were modeled in a Lagrangian hydrocode using an experimentally calibrated Preston-Tonks-Wallace (PTW) constitutive model. By using the shock data to constrain a high rate portion of PTW, the model was able to generally match plasticity effects on the measured wave profile (surface velocity) during the shock loading, but not unloading. A backstress-based cyclic plasticity model to capture the quasi-elastic release (Bauschinger-type effect) was explored in order to match the unloading and reloading portions of the measured wave profiles. A comparison is made with other approaches in the literature to capture the cyclic plasticity in shock conditions.

Authors:
 [1];  [1];  [1];  [1]
  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
DOE/LANL
OSTI Identifier:
1043502
Report Number(s):
LA-UR-12-22056
TRN: US201214%%56
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: SEM XII International Congress & Exposition on Experimental and Applied Mechanics ; 2012-06-11 - 2012-06-14 ; Costa Mesa, California, United States
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; BERYLLIUM; HCP LATTICES; LAGRANGIAN FUNCTION; LOADING; METALS; PLASTICITY; PLATES; PRESSURE RANGE GIGA PA; UNLOADING; VELOCITY

Citation Formats

Prime, Michael B., Hunter, Abigail, Canfield, Thomas R., and Adams, Chris D. Cyclic Plasticity under Shock Loading in an HCP Metal. United States: N. p., 2012. Web.
Prime, Michael B., Hunter, Abigail, Canfield, Thomas R., & Adams, Chris D. Cyclic Plasticity under Shock Loading in an HCP Metal. United States.
Prime, Michael B., Hunter, Abigail, Canfield, Thomas R., and Adams, Chris D. Fri . "Cyclic Plasticity under Shock Loading in an HCP Metal". United States. https://www.osti.gov/servlets/purl/1043502.
@article{osti_1043502,
title = {Cyclic Plasticity under Shock Loading in an HCP Metal},
author = {Prime, Michael B. and Hunter, Abigail and Canfield, Thomas R. and Adams, Chris D.},
abstractNote = {Plate impact experiments with pressures from 2 to 20 GPa, including one shock-partial release-reshock experiment, were performed on vacuum hot-pressed S-200F Beryllium. This hexagonal close-packed (HCP) metal shows significant plasticity effects in such conditions. The experiments were modeled in a Lagrangian hydrocode using an experimentally calibrated Preston-Tonks-Wallace (PTW) constitutive model. By using the shock data to constrain a high rate portion of PTW, the model was able to generally match plasticity effects on the measured wave profile (surface velocity) during the shock loading, but not unloading. A backstress-based cyclic plasticity model to capture the quasi-elastic release (Bauschinger-type effect) was explored in order to match the unloading and reloading portions of the measured wave profiles. A comparison is made with other approaches in the literature to capture the cyclic plasticity in shock conditions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {6}
}

Conference:
Other availability
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