CALIBRATING THE JOHNSON-HOLMQUIST CERAMIC MODEL FOR SIC USING CTH

Journal Article · Mon Dec 28 04:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3295073· OSTI ID:21366841

Cazamias, J U ^[1]; Bilyk, S R ^[2]

---

1. University of Alabama at Birmingham (United States)
2. U.S. Army Research Laboratory, APG, MD 21005 (United States)

The Johnson-Holmquist ceramic material model has been calibrated and successfully applied to numerically simulate ballistic events using the Lagrangian code EPIC. While the majority of the constants are ''physics'' based, two of the constants for the failed material response are calibrated using ballistic experiments conducted on a confined cylindrical ceramic target. The maximum strength of the failed ceramic is calibrated by matching the penetration velocity. The second refers to the equivalent plastic strain at failure under constant pressure and is calibrated using the dwell time. Use of these two constants in the CTH Eulerian hydrocode does not predict the ballistic response. This difference may be due to the phenomenological nature of the model and the different numerical schemes used by the codes. This paper determines the aforementioned material constants for SiC suitable for simulating ballistic events using CTH.

• OSTI ID: 21366841
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1195; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBIDES
CARBON COMPOUNDS
CERAMICS
CONFIGURATION
CYLINDRICAL CONFIGURATION
FAILURES
FUNCTIONS
LAGRANGIAN FUNCTION
MECHANICAL PROPERTIES
PLASTICITY
SILICON CARBIDES
SILICON COMPOUNDS
STRAINS