Determination of horizon size in state-based peridynamics

Wang, Bingquan and Oterkus, Selda and Oterkus, Erkan (2023) Determination of horizon size in state-based peridynamics. Continuum Mechanics and Thermodynamics, 35 (3). pp. 705-728. ISSN 0935-1175 (https://doi.org/10.1007/s00161-020-00896-y)

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Abstract

Peridynamics is based on integro-differential equations and has a length scale parameter called horizon which gives peridynamics a non-local character. Currently, there are three main peridynamic formulations available in the literature including bond-based peridynamics, ordinary state-based peridynamics and non-ordinary state-based peridynamics. In this study, the optimum horizon size is determined for ordinary state-based peridynamics and non-ordinary state-based peridynamics formulations by using uniform and non-uniform discretisation under dynamic and static conditions. It is shown that the horizon sizes selected as optimum sizes for uniform discretisation can also be used for non-uniform discretisation without introducing significant error to the system. Moreover, a smaller horizon size can be selected for non-ordinary state-based formulation which can yield significant computational advantage. It is also shown that same horizon size can be used for both static and dynamic problems.