Investigating the relationship between radial pre-stress magnitude and ballistic projectile dwell in heavy confined ceramic targets

Ryan, Shannon; Gallardy, Denver; Zellner, Michael; Bunn, Jeff R.; Nguyen, Long H.; Swoboda, Patrick

doi:10.1016/j.ijimpeng.2021.104002

Title: Investigating the relationship between radial pre-stress magnitude and ballistic projectile dwell in heavy confined ceramic targets

Journal Article · Sat Aug 14 00:00:00 EDT 2021 · International Journal of Impact Engineering

DOI:https://doi.org/10.1016/j.ijimpeng.2021.104002· OSTI ID:1884010

^[1]; Gallardy, Denver ^[2]; Zellner, Michael ^[2];

^[3]; Nguyen, Long H. ^[1]; Swoboda, Patrick ^[2]

Defense Science and Technology Group, Fishermans Bend, VIC (Australia)
DEVCOM US Army Research Laboratory (USARL), Aberdeen Proving Grounds, MD (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

A series of bare silicon carbide ceramic armour disks were manufactured with high-strength steel containment to induce varying magnitudes of radial pre-stress. The induced radial stresses, ranging from 0 to 900 MPa, were measured via neutron diffraction and verified by comparison with numerical calculations. Four targets of each configuration, referred to as slip-fit, moderate pre-stress, and high pre-stress, were subject to ballistic testing with hemispherical-nose, tungsten heavy alloy long rod projectiles to determine the interface defeat transition velocity. In-situ diagnostics were unsuccessful in aiding the identification of interface defeat, necessitating a reliance on post-mortem assessment. A transition velocity of approx. 1000 m/s was identified for the unstressed target, increasing to approx. 1200 m/s for the pre-stressed configurations. No performance effect was discernible between the moderate (372 MPa) and high (899 MPa) pre-stress configurations, suggesting that an optimal performance may be achieved for lower pre-stress levels (i.e., <372 MPa). Additionally, the test results were compared with four semi-analytical predictions of interface defeat performance and good agreement was found, albeit with significant range in the model predictions.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1884010

Alternate ID(s):: OSTI ID: 1868575

Journal Information:: International Journal of Impact Engineering, Vol. 157, Issue 1; ISSN 0734-743X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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