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Simulation of dynamic response of granite: A numerical approach of shock-induced damage beneath impact craters

Ai, H. A. and Ahrens, T. J. (2006) Simulation of dynamic response of granite: A numerical approach of shock-induced damage beneath impact craters. International Journal of Impact Engineering, 33 (1-12). pp. 1-10. ISSN 0734-743X. doi:10.1016/j.ijimpeng.2006.09.046. https://resolver.caltech.edu/CaltechAUTHORS:20110120-142722360

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Abstract

The mechanical response of rocks to dynamic loading is complex. It is not well understood because of the difficulty of defining an effective shear and tensile strength model. Recently AUTODYN-2D from Century Dynamics is used to simulate the shock-induced damage in granite targets impacted by projectiles at different velocities. The simulated results are compared with experiment data. Johnson–Holmquist shock damage constitutive model for brittle materials is applied to describe the damage and shear strain achieved in a confined volume of granite. A tensile crack softening model is coupled with the JH model to simulate the propagation of radial tensile cracks generated by the principal tensile stress perpendicular to the shock front. The tensile stress is assumed to be equal to the deviatoric stress at radii that experience less than the Hogoniot elastic limit stress. Instead of traditional grid-based methods, a smooth particle hydrodynamics is used to define damaged regions in brittle media.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.ijimpeng.2006.09.046DOIUNSPECIFIED
http://www.sciencedirect.com/science/article/B6V3K-4MCW9SN-C/2/8402fef47d83592cc7a47d9c3b2255cbPublisherUNSPECIFIED
Additional Information:© 2006 Elsevier Ltd. Available online 20 November 2006. Research supported by NASA/Goddard grant under award no. NNG04GI07G. We appreciate the technical support of Century Dynamics Inc. for numerical studies, and E. Gelle, M. Long for experimental parts. Contribution No. 9114. Division of Geological and Planetary Sciences, Caltech.
Funders:
Funding AgencyGrant Number
NASA/GoddardNNG04GI07G
Subject Keywords:Granite; Shock-induced damage; JH2 model; Impact crater
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences9114
Issue or Number:1-12
DOI:10.1016/j.ijimpeng.2006.09.046
Record Number:CaltechAUTHORS:20110120-142722360
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110120-142722360
Official Citation:H.A. Ai, T.J. Ahrens, Simulation of dynamic response of granite: A numerical approach of shock-induced damage beneath impact craters, International Journal of Impact Engineering, Volume 33, Issues 1-12, Hypervelocity Impact Proceedings of the 2005 Symposium, December 2006, Pages 1-10, ISSN 0734-743X, DOI: 10.1016/j.ijimpeng.2006.09.046. (http://www.sciencedirect.com/science/article/B6V3K-4MCW9SN-C/2/8402fef47d83592cc7a47d9c3b2255cb)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21837
Collection:CaltechAUTHORS
Deposited By: Benjamin Perez
Deposited On:20 Jan 2011 23:02
Last Modified:09 Nov 2021 16:00

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