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Long-Rod Penetration into Intact and Pre-Damaged SiC Ceramic

Penetration experiments with long rods into SiC ceramics are available for two rod materials over a wide range of impact velocities [1-2]. The ceramics used in these experiments were initially intact, without cracks or other induced damage. The penetration response of three types of pre-damaged SiC...

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Main Authors: Anderson, Jr , Charles, Behner, Thilo, Orphal, Dennis, Nickolls, Arthur, Holmquist, Timothy
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Behner, Thilo
Orphal, Dennis
Nickolls, Arthur
Holmquist, Timothy
description Penetration experiments with long rods into SiC ceramics are available for two rod materials over a wide range of impact velocities [1-2]. The ceramics used in these experiments were initially intact, without cracks or other induced damage. The penetration response of three types of pre-damaged SiC was also investigated [3]. The pre-damaged targets, which were confined in 7075 aluminum sleeves consisted of 1) thermally shocked (many non-contiguous cracks), 2) thermally shocked with mechanical load/unload cycling (in-situ comminuted), and 3) compacted powder. Further experiments were conducted on intact and thermally shocked (predamaged) SiC-N that overlapped the previous test data, and to extend the data to lower impact velocities. The results of these additional experiments were different than expected; this article describes the experiments and comparisons with previous data. Prepared in collaboration with the Fraunhofer Institut fur Kurzzeitdynamik (EMI), Freiburg, Germany, International Research Associates, Inc, Pleasanton, CA, and Southwest Research Institute, Minneapolis, MN.
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The ceramics used in these experiments were initially intact, without cracks or other induced damage. The penetration response of three types of pre-damaged SiC was also investigated [3]. The pre-damaged targets, which were confined in 7075 aluminum sleeves consisted of 1) thermally shocked (many non-contiguous cracks), 2) thermally shocked with mechanical load/unload cycling (in-situ comminuted), and 3) compacted powder. Further experiments were conducted on intact and thermally shocked (predamaged) SiC-N that overlapped the previous test data, and to extend the data to lower impact velocities. The results of these additional experiments were different than expected; this article describes the experiments and comparisons with previous data. 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source DTIC Technical Reports
subjects ALUMINUM
ALUMINUM SLEEVES
CERAMIC MATERIALS
Ceramics, Refractories and Glass
COMPACTED POWDERS
CRACKING(FRACTURING)
IMPACT
IMPACT VELOCITY
Inorganic Chemistry
INTACT SIC CERAMICS
LOADS(FORCES)
LONG-ROD PENETRATION
Mechanics
PENETRATION
PENETRATION RESPONSE
POWDERS
PRE-DAMAGED SIC CERAMICS
RODS
SIC(SILICON CARBIDES)
SILICON CARBIDES
SLEEVES
THERMAL SHOCK
VELOCITY
title Long-Rod Penetration into Intact and Pre-Damaged SiC Ceramic
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