An Assessment of Peridynamics for Pre and Post Failure Deformation

Report No. ARL-TR-5811
Authors: Richard Becker and Richard J. Lucas
Date/Pages: November 2011; 44 pages
Abstract: The peridynamics method was examined in the context of deformation conditions commonly observed before and after dynamic material failure by using a combination of full simulations, targeted numerical techniques, and analytic solutions. The results show numerical dispersion and boundary condition artifacts expected with nonlocal methods, anomalous volume-shear coupling related to the numerical grid, and limitations of the current material model implementations for large strain and impact simulations. Implications of these observations and potential modifications are discussed. Differences and similarities between peridynamics and conventional finite element formulations are also explored.
Distribution: Approved for public release
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Last Update / Reviewed: November 1, 2011