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Hydrocode modelling of hypervelocity impact on brittle materials: depth of penetration and conchoidal diameter

Taylor, Emma A., Tsembelis, K., Hayhurst, Colin J., Kay, L., Burchell, Mark J. (1999) Hydrocode modelling of hypervelocity impact on brittle materials: depth of penetration and conchoidal diameter. International Journal of Impact Engineering, 23 (1). pp. 895-904. ISSN 0734-743X. (doi:10.1016/S0734-743X(99)00133-5) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:5081)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL:
http://dx.doi.org/10.1016/S0734-743X(99)00133-5

Abstract

The Johnson-Holmquist brittle material model has been implemented into the AUTODYN hydrocode and used for Lagrangian simulations of hypervelocity impact of spherical projectiles onto soda-lime glass targets. A second glass model (based on a shock equation of state and the Mohr-Coulomb strength model) has also been used. Hydrocode simulations using these two models were compared with experimental results. At 5 km s(-1), the Mohr-Coulomb model under-predicted the depth of penetration, whilst adjustment of the Johnson-Holmquist model bulking parameter was required to match the experimental data to the simulation results. Neither model reproduced the conchoidal diameter; a key measured parameter in the analysis of retrieved solar arrays, so two failure models were used to investigate the tensile failure regime. A principal tensile failure stress model, with crack softening, when used with failure stresses between 100 and 150 MPa and varying bulking parameters, reproduced the conchoidal diameter morphology. Empirically-determined, power-law damage equation predictions for the range 5-15 km s(-1) were compared with simulations using both models since no experimental data was available. The power law velocity dependence of the depth of penetration simulations was found to be significantly lower than the 0.67 predicted by the empirically-determined damage equations.

Item Type: Article
DOI/Identification number: 10.1016/S0734-743X(99)00133-5
Additional information: Issue: 1
Subjects: Q Science
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Mark Burchell
Date Deposited: 21 Mar 2009 12:22 UTC
Last Modified: 16 Nov 2021 09:43 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/5081 (The current URI for this page, for reference purposes)

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