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Title: Experimental technique to obtain material response at strain rates to 10[sup 5]s[sup [minus]1]

Abstract

An experimental technique is under development to probe high strain rate pressure volume material response. The experimental domain consists of strain rates to 10[sup 5] s[sup [minus]1], pressures to 2.2 GPa, and dwell times around 50 [mu]s. The development is focused on providing a standardized testing technique to acquire data for conditions that are difficult to explore using present methods. This technique uses direct projectile impact to pressurize the sample, and radial confinement to maintain the specimen in a known volume for for the duration of the experiment. Varying the projectile length controls the dwell time and projectile velocity controls the peak pressure. This technique bridges the gap between planar impact experiments commonly yielding strain rates of 10[sup 6] s[sup [minus]1] and split Hopkinson bar experiments normally performed at strain rates of 10[sup 3] s[sup [minus]1]. This testing technique is expected to be beneficial in determining material properties used in numerical simulations, and in probing transient deformational processes in the time domain of 50 [mu]s. Examples of such processes include heat conduction from heterogeneous sources, mass diffusion, some types of phase change phenomena, large void collapse, crack and/or damage evolution, and some types of chemical kinetics. This discussion centers aroundmore » the use of numerical experiments to understand how accurately the pressure volume material response can be extracted from this experiment. [copyright]American Institute of Physics« less

Authors:
 [1];  [2]
  1. Southwest Research Institute, San Antonio, Texas 78238 (United States)
  2. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
Publication Date:
OSTI Identifier:
6913438
Report Number(s):
CONF-921145-
Journal ID: ISSN 0094-243X; CODEN: APCPCS
Resource Type:
Conference
Journal Name:
AIP Conference Proceedings (American Institute of Physics); (United States)
Additional Journal Information:
Journal Volume: 309:1; Conference: Production and neutralization of negative ions and beams, Upton, NY (United States), 9-13 Nov 1992; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; IMPACT SHOCK; TEST FACILITIES; COMPUTERIZED SIMULATION; DESIGN; MECHANICAL PROPERTIES; STRAIN RATE; TIME DEPENDENCE; VERY HIGH PRESSURE; SIMULATION; 425000* - Engineering- Power Cycles- (1980-)

Citation Formats

Young, R, and Silliling, S. Experimental technique to obtain material response at strain rates to 10[sup 5]s[sup [minus]1]. United States: N. p., 1994. Web.
Young, R, & Silliling, S. Experimental technique to obtain material response at strain rates to 10[sup 5]s[sup [minus]1]. United States.
Young, R, and Silliling, S. Sun . "Experimental technique to obtain material response at strain rates to 10[sup 5]s[sup [minus]1]". United States.
@article{osti_6913438,
title = {Experimental technique to obtain material response at strain rates to 10[sup 5]s[sup [minus]1]},
author = {Young, R and Silliling, S},
abstractNote = {An experimental technique is under development to probe high strain rate pressure volume material response. The experimental domain consists of strain rates to 10[sup 5] s[sup [minus]1], pressures to 2.2 GPa, and dwell times around 50 [mu]s. The development is focused on providing a standardized testing technique to acquire data for conditions that are difficult to explore using present methods. This technique uses direct projectile impact to pressurize the sample, and radial confinement to maintain the specimen in a known volume for for the duration of the experiment. Varying the projectile length controls the dwell time and projectile velocity controls the peak pressure. This technique bridges the gap between planar impact experiments commonly yielding strain rates of 10[sup 6] s[sup [minus]1] and split Hopkinson bar experiments normally performed at strain rates of 10[sup 3] s[sup [minus]1]. This testing technique is expected to be beneficial in determining material properties used in numerical simulations, and in probing transient deformational processes in the time domain of 50 [mu]s. Examples of such processes include heat conduction from heterogeneous sources, mass diffusion, some types of phase change phenomena, large void collapse, crack and/or damage evolution, and some types of chemical kinetics. This discussion centers around the use of numerical experiments to understand how accurately the pressure volume material response can be extracted from this experiment. [copyright]American Institute of Physics},
doi = {},
journal = {AIP Conference Proceedings (American Institute of Physics); (United States)},
issn = {0094-243X},
number = ,
volume = 309:1,
place = {United States},
year = {1994},
month = {7}
}

Conference:
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