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Title: Intermediate Strain-Rate Loading Experiments - Technique and Applications to Ceramics

Abstract

A new test methodology is described which allows access to loading rates that lie between split Hopkinson bar and shock-loading techniques. Gas gun experiments combined with velocity interferometry techniques have been used to experimentally determine the intermediate strain-rate loading behavior of Coors AD995 alumina and Cercom silicon-carbide rods. Graded-density materials have been used as impactors; thereby eliminating the tension states generated by the radial stress components during the loading phase. Results of these experiments demonstrate that the time-dependent stress pulse generated during impact allows an efficient transition from the initial uniaxial strain loading to a uniaxial stress state as the stress pulse propagates through the rod. This allows access to intermediate loading rates over 5 x 10{sup 3}/s to a few times 10{sup 4}/s.

Authors:
;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
9756
Report Number(s):
SAND99-2116C
TRN: AH200125%%39
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: 15th U.S. Army Symposium on Solid Mechanics, Myrtle Beach, SC (US), 04/12/1999--04/14/1999; Other Information: PBD: 16 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; INTERFEROMETRY; STRAIN RATE; SILICON CARBIDES; ALUMINIUM OXIDES; DYNAMIC LOADS

Citation Formats

Chhabildas, L.C., and Reinhart, W.D. Intermediate Strain-Rate Loading Experiments - Technique and Applications to Ceramics. United States: N. p., 1999. Web.
Chhabildas, L.C., & Reinhart, W.D. Intermediate Strain-Rate Loading Experiments - Technique and Applications to Ceramics. United States.
Chhabildas, L.C., and Reinhart, W.D. Mon . "Intermediate Strain-Rate Loading Experiments - Technique and Applications to Ceramics". United States. https://www.osti.gov/servlets/purl/9756.
@article{osti_9756,
title = {Intermediate Strain-Rate Loading Experiments - Technique and Applications to Ceramics},
author = {Chhabildas, L.C. and Reinhart, W.D.},
abstractNote = {A new test methodology is described which allows access to loading rates that lie between split Hopkinson bar and shock-loading techniques. Gas gun experiments combined with velocity interferometry techniques have been used to experimentally determine the intermediate strain-rate loading behavior of Coors AD995 alumina and Cercom silicon-carbide rods. Graded-density materials have been used as impactors; thereby eliminating the tension states generated by the radial stress components during the loading phase. Results of these experiments demonstrate that the time-dependent stress pulse generated during impact allows an efficient transition from the initial uniaxial strain loading to a uniaxial stress state as the stress pulse propagates through the rod. This allows access to intermediate loading rates over 5 x 10{sup 3}/s to a few times 10{sup 4}/s.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}

Conference:
Other availability
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