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Numerical Modeling of Shock-Induced Damage for Granite under Dynamic Loading

Ai, H. A. and Ahrens, T. J. (2006) Numerical Modeling of Shock-Induced Damage for Granite under Dynamic Loading. In: Shock compression of condensed matter--2005 : proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter held at Baltimore, MD 31 July-5 August, 2005. AIP Conference Proceedings. No.845. American Institute of Physics , Melville, NY, pp. 1431-1434. ISBN 0-7354-0341-4.

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Johnson-Holmquist constitutive model for brittle materials, coupled with a crack softening model, is used to describe the deviatoric and tensile crack propagation beneath impact crater in granite. Model constants are determined either directly from static uniaxial strain loading experiments, or indirectly from numerical adjustment. Constants are put into AUTODYN-2D from Century Dynamics to simulate the shock-induced damage in granite targets impacted by projectiles at different velocities. The agreement between experimental data and simulated results is encouraging. Instead of traditional grid-based methods, a Smooth Particle Hydrodynamics solver is used to define damaged regions in brittle media.

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Additional Information:© 2006 American Institute of Physics. Research supported by NASA/Goddard grant under award no. NNG04GI07G. Contribution No. 9123. Division of Geological and Planetary Sciences, Caltech.
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Subject Keywords:shock wave effects; rocks; dynamic response; brittle fracture; cracks; numerical analysis; granite; JH2 model; crack softening; shock-induced damage; AUTODYN; SPH
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Caltech Division of Geological and Planetary Sciences9123
Series Name:AIP Conference Proceedings
Issue or Number:845
Record Number:CaltechAUTHORS:AIHaipcp06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4791
Deposited By: Archive Administrator
Deposited On:06 Sep 2006
Last Modified:02 Oct 2019 23:16

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