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Title: A Novel Mechanical Method to Measure Shear Strength in Specimens Under Pressure

Abstract

A new experimental apparatus has been developed for performing shear tests on specimens held under moderately high hydrostatic pressures (on the order of 4 GPa). This testing procedure experimentally determines the pressure-dependent shear strength of thin foil specimens. The experiments provide calibration data for models of materials subjected to extreme pressures such as the Steinberg-Guinan hardening model and can assist in model validation for discrete dislocation dynamics simulations, among others. This paper reports the development of the experimental procedures and the results of initial experiments on thin foils of polycrystalline Ta performed under hydrostatic pressures ranging from 1 to 4 GPa. Both yielding and hardening behavior of Ta are observed to be sensitive to the imposed pressure.

Authors:
; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
895718
Report Number(s):
UCRL-PROC-220534
Journal ID: ISSN 1946--4274; TRN: US200711%%284
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Journal Volume: 929; Conference: Presented at: Materials Research Society Spring Meeting, San Francisco, CA, United States, Apr 16 - Apr 20, 2006
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; 47 OTHER INSTRUMENTATION; CALIBRATION; DISLOCATIONS; HARDENING; HYDROSTATICS; SHEAR; SHEAR PROPERTIES; TESTING; VALIDATION

Citation Formats

Escobedo, J P, Field, D, Lassila, D, and Leblanc, M. A Novel Mechanical Method to Measure Shear Strength in Specimens Under Pressure. United States: N. p., 2006. Web. doi:10.1557/PROC-0929-II03-01.
Escobedo, J P, Field, D, Lassila, D, & Leblanc, M. A Novel Mechanical Method to Measure Shear Strength in Specimens Under Pressure. United States. doi:10.1557/PROC-0929-II03-01.
Escobedo, J P, Field, D, Lassila, D, and Leblanc, M. Tue . "A Novel Mechanical Method to Measure Shear Strength in Specimens Under Pressure". United States. doi:10.1557/PROC-0929-II03-01. https://www.osti.gov/servlets/purl/895718.
@article{osti_895718,
title = {A Novel Mechanical Method to Measure Shear Strength in Specimens Under Pressure},
author = {Escobedo, J P and Field, D and Lassila, D and Leblanc, M},
abstractNote = {A new experimental apparatus has been developed for performing shear tests on specimens held under moderately high hydrostatic pressures (on the order of 4 GPa). This testing procedure experimentally determines the pressure-dependent shear strength of thin foil specimens. The experiments provide calibration data for models of materials subjected to extreme pressures such as the Steinberg-Guinan hardening model and can assist in model validation for discrete dislocation dynamics simulations, among others. This paper reports the development of the experimental procedures and the results of initial experiments on thin foils of polycrystalline Ta performed under hydrostatic pressures ranging from 1 to 4 GPa. Both yielding and hardening behavior of Ta are observed to be sensitive to the imposed pressure.},
doi = {10.1557/PROC-0929-II03-01},
journal = {},
number = ,
volume = 929,
place = {United States},
year = {Tue Apr 11 00:00:00 EDT 2006},
month = {Tue Apr 11 00:00:00 EDT 2006}
}

Conference:
Other availability
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