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Verification and validation of the Optimal Transportation Meshfree (OTM) simulation of terminal ballistics

Li, B. and Kidane, A. and Ravichandran, G. and Ortiz, M. (2012) Verification and validation of the Optimal Transportation Meshfree (OTM) simulation of terminal ballistics. International Journal of Impact Engineering, 42 . pp. 25-36. ISSN 0734-743X.

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We evaluate the performance of the OptimalTransportationMeshfree (OTM) method of Li et al. [21], suitably extended to account for seizing contact and fracture, in applications involving terminalballistics. The evaluation takes the form of a conventional Verification and Validation (V&V) analysis. In support of the validation analysis, we have conducted tests concerned with the normal impact of Aluminum alloy 6061-T6 thin plates by S2 tool steel spherical projectile over a range of plate thicknesses of [0.8 mm, 1.6 mm] and a range of impact velocities of [100, 400]m/s. The tests were conducted at Caltech’s GALCIT gas-gun Plate-Impact Facility. We find excellent agreement between measured and computed perforation areas and a ballistic limits over the thickness and velocity ranges considered. Our verification analysis consists of model-on-model comparisons and an assessment of the convergence of the OTM method. Specifically, we find excellent agreement between the incident vs. residual velocities predicted by the OTM method and by the power-law relation of Recht and Ipson [36]. We also find robust linear convergence of the OTM method as measured in terms of residual velocity error vs. number of nodes.

Item Type:Article
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URLURL TypeDescription
Ravichandran, G.0000-0002-2912-0001
Ortiz, M.0000-0001-5877-4824
Additional Information:© 2011 Elsevier Ltd. Received 11 April 2011. Revised 9 November 2011. Accepted 10 November 2011. Available online 25 November 2011. The authors gratefully acknowledge the support of the Department of Energy National Nuclear Security Administration under Award Number DE-FC52-08NA28613 through Caltech’s ASC/PSAAP Center for the Predictive Modeling and Simulation of High Energy Density Dynamic Response of Materials.
Funding AgencyGrant Number
Department of Energy (DOE) National Nuclear Security AdministrationDE-FC52-08NA28613
Subject Keywords: Optimaltransportation; Local max-ent interpolation; Material-point sampling; Material-point failure; Ballistic impact
Record Number:CaltechAUTHORS:20120403-094946212
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Official Citation:B. Li, A. Kidane, G. Ravichandran, M. Ortiz, Verification and validation of the Optimal Transportation Meshfree (OTM) simulation of terminal ballistics, International Journal of Impact Engineering, Volume 42, April 2012, Pages 25-36, ISSN 0734-743X, 10.1016/j.ijimpeng.2011.11.003. (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29953
Deposited By: Ruth Sustaita
Deposited On:03 Apr 2012 18:01
Last Modified:09 Mar 2020 13:19

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