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Published April 2012 | metadata_only
Journal Article

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


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.

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.

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August 22, 2023
August 22, 2023